CN114839443A

CN114839443A - Multi-port antenna scattering parameter measuring system and method and calibration system and method

Info

Publication number: CN114839443A
Application number: CN202210776110.1A
Authority: CN
Inventors: 苏光杰; 宋茂盛; 王智君
Original assignee: FOSHAN KENBOTONG COMMUNICATION Ltd; Kenbotong Technology Co ltd
Current assignee: FOSHAN KENBOTONG COMMUNICATION Ltd; Kenbotong Technology Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2022-08-02
Anticipated expiration: 2042-07-04
Also published as: CN115356541A; CN115356541B; CN114839443B

Abstract

The application provides a calibration system and a method for scattering parameters of a multi-port antenna, and a measurement method and a system. The calibration method comprises the following steps: acquiring scattering parameters to be detected; traversing various scattering parameters to be tested at the same test frequency, generating direct response calibration for the scattering parameters to be tested between two antenna ports which are not identical, and generating full 1-port calibration scripts for the scattering parameters to be tested of different single antenna ports; under the same test frequency, combining each through response calibration script with a full 1-port calibration script of the same source switch channel and/or the same target switch channel of the through response calibration script to generate a full 2-port calibration script or an enhanced response calibration script; and executing the calibration script to realize calibration. The method and the device can realize the multiplexing of error coefficients, reduce calibration steps, do not need to use expensive electronic calibration parts, and reduce calibration time by half; the one-time switch can measure multiple indexes, reduce the switching times of the switch, reduce the testing time and reduce the aging of the switch.

Description

Multi-port antenna scattering parameter measuring system and method and calibration system and method

Technical Field

The invention belongs to the field of radio frequency parameter measurement, and particularly relates to a multi-port scattering parameter measurement system and method and a calibration system and method.

Background

From the application of smart antennas to 3G communication systems, multi-port antennas, smart antennas and TDD + FDD multi-mode antennas are increasingly used in modern wireless systems, and in 5G systems, large-scale array antennas with 32 ports, 64 ports or even 128 ports are used.

Testing the metrics of each port and between ports has become a challenge when developing and producing multi-port antennas. Usually we need to measure the standing wave ratio of each port, the isolation between two ports, and in case of smart antenna or large scale array antenna, the transmission coefficient from each antenna port to the calibration port. These indices are collectively referred to as scattering parameters (S-parameters) in the test system, and the basic measurement device is a microwave network analyzer. In order to measure all these scattering parameters quickly, it is usually necessary to add a switch matrix on the basis of the network analyzer to form a multi-port test system to expand the test capability of the network analyzer.

As shown in FIG. 1, in order for the network analyzer to accurately measure the scattering parameters of the DUT, the multi-port test system needs to be calibrated. Different index measurements require different ways of calibration, such as: measuring the standing-wave ratio of the i port, and calibrating the i port by using all 1 ports; and if the isolation or transmission coefficient between the i port and the j port is measured, direct connection calibration between the i port and the j port needs to be carried out. In order to reduce the number of switching times and the measurement time, a program is usually designed to measure the isolation or transmission coefficient between the i port and the j port and simultaneously measure the standing-wave ratio between the i port and the j port, so that all 2-port calibration needs to be performed between the i port and the j port.

Calibration of a scattering parameter test system based on a network analyzer generally uses four standard loads, namely Short-circuit, Open-circuit, matching and direct connection, which respectively measure known performances, to calibrate a test port, and is called a Short Open Load direct connection response calibration Script (SOLT). For example, when the i port is calibrated at all 1 ports, three loads of short circuit, open circuit and matching need to be measured at the i port for calibration; when direct connection calibration is carried out between the i and j ports, direct connection loads need to be measured between the i and j ports; when all 2-port calibration is performed between the i and j ports, a through load needs to be measured between the i and j ports, and the i and j ports respectively measure a short circuit load, an open circuit load and a matched load. A multi-port scattering parameter measurement system is characterized in that a network analyzer is used for executing SOLT calibration, a main control computer is used for extracting error coefficients, and the corresponding error coefficients are recovered according to the current switch channel and the calibration type before testing, so that the calibration of the system is realized. The specific method comprises the following steps: the main control computer switches on a switch channel according to the index and the port to be measured, sets the required calibration type, controls a network analyzer to execute SOLT calibration, and then extracts an error coefficient; and when in measurement, the switch channel is switched on according to the index and the port to be measured, the corresponding error coefficient is recovered, and then the measurement is executed. The type of calibration used during calibration must be the same as the type of calibration used during testing, resulting in each index having almost its own calibration procedure.

It can be seen that the calibration process is very cumbersome, especially when the number of ports is large. According to measurement, in order to measure an 8-column smart antenna, a 9-port switch matrix is required, and the calibration time is required to be more than 30 minutes. In order to solve the problem of complicated calibration, foreign mainstream network analyzer manufacturers are matched with multi-port electronic calibration pieces, and the calibration of a 9-port switch matrix can be shortened to within 3 minutes. However, the electronic calibration piece is high in manufacturing cost and cannot be borne by common manufacturers, and a mechanical SOLT method which is time-consuming and low in manufacturing cost is still adopted.

There is a need for a new calibration method that reduces the number of times the standard load is measured to reduce the calibration time.

Disclosure of Invention

The embodiment of the invention aims to provide a multi-port scattering parameter measuring system and method and a calibration system and method, which can reduce the times of measuring standard loads and reduce the calibration time.

In order to achieve the above object, an embodiment of the present invention provides a calibration method for a scattering parameter of a multiport antenna, including:

acquiring scattering parameters to be detected, wherein each scattering parameter to be detected comprises: the device comprises a parameter name, test frequency, antenna ports and switch channels, wherein each antenna port corresponds to one switch channel, and the switch channels are one or two of a source switch channel and a target switch channel;

traversing various scattering parameters to be tested at the same test frequency, generating direct response calibration for the scattering parameters to be tested between two antenna ports which are not identical, and generating full 1-port calibration scripts for the scattering parameters to be tested of different single antenna ports;

under the same test frequency, recombining each straight-through response calibration script with a full 1-port calibration script of the same source switch channel and/or the same target switch channel to generate a full 2-port calibration script or an enhanced response calibration script;

and executing the calibration script to realize calibration.

The embodiment of the invention also provides a calibration system for the scattering parameters of the multi-port antenna, which comprises the following steps:

the acquisition module is used for acquiring scattering parameters to be detected, and each scattering parameter to be detected comprises: the device comprises a parameter name, test frequency, antenna ports and switch channels, wherein each antenna port corresponds to one switch channel, and the switch channels are one or two of a source switch channel and a target switch channel;

the script generation module is used for traversing various scattering parameters to be tested under the same test frequency, generating direct response calibration for the scattering parameters to be tested between two antenna ports which are not identical, and generating all-1-port calibration scripts for the scattering parameters to be tested of different single antenna ports;

the script recombination module is used for combining each through response calibration script with a full 1-port calibration script of the same source switch channel and/or the same target switch channel of the through response calibration script to generate a full 2-port calibration script or an enhanced response calibration script under the same test frequency;

and the script execution module is used for executing the calibration script to realize calibration.

The calibration method and the calibration system for the scattering parameters of the multi-port antenna provided by the embodiment of the invention realize the multiplexing of error coefficients, thereby effectively reducing the calibration steps, avoiding the use of expensive electronic calibration parts and reducing the calibration time by half.

The embodiment of the invention also provides a method for testing the scattering parameters of the multi-port antenna, which comprises the following steps:

executing the test of the double-port scattering parameters, wherein the switch channels corresponding to the double-port scattering parameters comprise a source switch channel and a target switch channel;

when a double-port scattering parameter test is executed, if single-port scattering parameters of the same source switch channel and/or the same target switch channel exist, the communication state of the two switch channels is kept unchanged, and the single-port scattering parameters of the same source switch channel and/or the same target switch channel are measured.

The embodiment of the invention also provides a multi-port scattering parameter testing system, which comprises: the network analyzer, the microwave switch matrix and the main control computer are provided with the calibration method, wherein the network analyzer is in communication connection with the switch matrix, and the switch matrix is in communication connection with the tested piece.

According to the system and the method for measuring the scattering parameters of the multi-port antenna, provided by the embodiment of the invention, when the port indexes are measured, the double-port scattering parameters are measured, meanwhile, the single-port scattering parameters with the same port name are searched under the condition of matching of calibration types, and meanwhile, the single-port scattering parameters are measured, namely, a single-switch can measure multiple indexes, the switching times of the switch are reduced, the test time is reduced, and the aging of the switch is reduced.

Drawings

FIG. 1 is a block diagram showing the structure of a conventional multi-port scattering parameter measurement system;

FIG. 2 is a flow chart illustrating the steps of a calibration method for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 3 is a flowchart illustrating a detailed step of the calibration method for scattering parameters of a multi-port antenna in step S120 according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating a detailed step of the calibration method for scattering parameters of a multi-port antenna according to an embodiment of the present invention, in step S130;

FIG. 5 is a flowchart illustrating a detailed step of the calibration method for scattering parameters of a multi-port antenna in step S140 according to an embodiment of the present invention;

FIG. 6 is a flowchart illustrating a calibration procedure of a full 2-port calibration script of the calibration method for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 7 is a flowchart illustrating the calibration steps of an enhanced response calibration script of the calibration method for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 8 is a flowchart illustrating the calibration steps of a pass-through response calibration script of the calibration method for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 9 is a flowchart illustrating the calibration procedure of a full 1-port calibration script of the calibration method for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 10 is a block diagram of a calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

fig. 11 is a block diagram illustrating a script generation module 120 of a calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 12 is a block diagram of a script re-organizing module 130 of the calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 13 is a block diagram of a script execution module 140 of the calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 14 is a flow chart illustrating the steps of a method for testing scattering parameters of a multi-port antenna according to an embodiment of the present invention;

FIG. 15 is a flow chart illustrating the steps of a multi-port antenna scattering parameter testing method according to an embodiment of the present invention;

fig. 16 is a diagram illustrating a main control interface of an 8-port antenna according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the embodiment of the invention, the isolation, the coupling phase and the coupling amplitude between the two antenna ports are collectively referred to as scattering parameters between the two ports. The standing wave ratio of one port is collectively referred to as the scattering parameter of one port.

The standard load is a load used as a test standard. The standard load includes: open circuit load, short circuit load, matched load, and shoot through load. Wherein, the first three standard loads: the open load, the short load, and the matched load are divided forward and backward. In the measurement, both the forward and backward indicators need to be measured. If the calibration is all 1-port calibration, the open-circuit load, the short-circuit load and the matched load need to be measured, the straight-through load needs to be measured according to the straight-through calibration rule, the open-circuit load, the short-circuit load and the matched load need to be measured on two channels respectively according to the all 2-port calibration, and the straight-through load is measured between the two channels; enhanced response calibration measures through loads and measures open, short, and matched loads on either the source or target switch path.

The scattering parameter, also called index. In the embodiment of the present invention, the scattering parameters (indexes) include 2 types: two-port scattering parameters (two-port index) and single-port scattering parameters (single-port index).

The two-port scattering parameter (two-port index) represents the scattering parameter between the source antenna port to the target antenna port. The source antenna port and the target antenna port may be two adjacent ports or two non-adjacent ports. The scattering parameter between two adjacent ports is isolation, and the scattering parameter between two non-adjacent ports is isolation, coupling phase and coupling amplitude. For example, the scattering parameter between the adjacent port 1 and port 2 is isolation, the scattering parameter between the non-adjacent calibration port 0 and port 2 is coupling amplitude and coupling phase, and the scattering parameter between the port 1 and port 4 is isolation.

The single-port scattering parameter (single-port index) represents the scattering parameter of one port. For example, the standing wave ratio of port 1, the standing wave ratio of port 2.

The invention aims to improve the standard SOLT calibration method and reduce the times of measuring standard load so as to reduce the calibration time.

The SOLT calibration method uses 6 error coefficient models, namely source matching error ES, reflection tracking error ER, directivity error ED, load matching error EL, transmission tracking error ET and isolation error EX.

The error coefficients required for the common calibration types are shown in table 1:

TABLE 1 common calibration types and error coefficients

By analyzing the results of table 1 above, it was found that,

1. enhanced response calibration = full 1 port calibration + pass response calibration;

2. error coefficients of the full 1-port calibration and the straight-through response calibration can be separated from the full 2-port calibration and the enhanced response calibration;

3. the calibration type may be specified by a combination of error coefficients;

therefore, as long as there is an error coefficient required by a certain calibration type, the corresponding calibration type can be restored, and the one-to-one correspondence of the calibration types when calibration and measurement are not required. According to the principle, the error coefficients can be shared in different calibration types, so that the generation of the corresponding error coefficients can be omitted if the corresponding error coefficients exist during calibration, thereby reducing certain calibration processes, or simplifying the calibration of all 2 ports with higher complexity into simpler through-response calibration.

The embodiments of the present invention are mainly directed to multi-port antennas, for example, multi-port array antennas such as 8-port, 32-port, and 64-port antennas. An 8-port antenna actually has 9 ports, respectively calibration port (CAL), port 1 (P1), port 2 (P2), port 3 (P3), port 4 (P4), port 5 (P5), port 6 (P6), port 7 (P7), port 8 (P8), and so on, with the 32-port antenna having 33 ports and the 64-port antenna having 65 ports.

Example 1

Fig. 2 is a flowchart illustrating steps of a calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 2, the calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention includes:

step S110, scattering parameters to be measured are obtained, and each scattering parameter to be measured comprises: the device comprises a parameter name, test frequency, antenna ports and switch channels, wherein each antenna port corresponds to one switch channel, and the switch channels comprise a source switch channel and/or a target switch channel;

step S120, traversing scattering parameters to be detected under the same test frequency, generating direct response calibration for the scattering parameters to be detected between two antenna ports which are not identical, and generating full 1-port calibration scripts for the scattering parameters to be detected of different single antenna ports;

fig. 3 is a flowchart illustrating a detailed step of step S120 of a calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 3, the calibration method according to an embodiment of the present invention, specifically, step S120 further includes:

step S121, traversing all scattering parameters to be tested under the same test frequency, and detecting the number of switch channels corresponding to the scattering parameters to be tested;

step S122, if the number of the switch channels is two, generating a direct connection response calibration script based on two switch channels which are not identical; if the number of the switch channels is 1, generating all 1-port calibration scripts based on different single switch channels.

For a multiport antenna, the scattering parameters of the multiport antenna are measured at a plurality of different test frequencies.

In the embodiment of the invention, firstly, under the same test frequency, the scattering parameters to be tested are traversed, the scattering parameters to be tested between two ports which are not identical are generated into the through response calibration script, the scattering parameters to be tested between different single antenna ports are generated into the all-1-port calibration script, and the through response calibration script and the all-1-port calibration script are a temporary storage calibration script at the moment. The generation process of the temporary calibration script is also applicable to the generation process of the temporary calibration scripts of other test frequencies, and the embodiment of the invention is not described in detail.

Specifically, in the embodiment of the present invention, two switch channels corresponding to each generated through response calibration script cannot be completely the same, that is, a plurality of through response calibration scripts cannot be generated for the completely same two switch channels. That is, the two-by-two direct response calibration scripts may be the same only with the source switch channel, or may be the same only with the target switch channel; but not the same source switch channel, as does the target switch channel. For example, assuming that a pass-through response calibration script for a 0-1 switch path has been generated, the next traversal to the 0-1 switch path does not require repeated generation of the pass-through response calibration script. If the next traversal is carried out to the 0-2 switch channel, a 0-2 through response calibration script can be generated; if the next traversal is made to the 1-2 switch channel, a 1-2 pass-through response calibration script can also be generated.

Step S130, under the same test frequency, combining each through response calibration script with a full 1-port calibration script of the same source switch channel and/or the same target switch channel to generate a full 2-port calibration script or an enhanced response calibration script;

in the embodiment of the invention, the temporary calibration script is recombined to generate a new calibration script. The temporary storage calibration script comprises the following steps: the method comprises a through response calibration script and a full 1-port calibration script, wherein the new calibration script is an enhanced response calibration script and a full 2-port calibration script.

In the embodiment of the invention, the script recombination process under the same test frequency is as follows: and (3) temporarily storing the calibration scripts, and combining the full 1-port calibration scripts of the same source switch channel and/or the same target switch channel according to the switch channels to generate an enhanced response calibration script and a full 2-port calibration script.

Fig. 4 is a flowchart illustrating a detailed step of step S130 of a calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 4, the calibration method according to an embodiment of the present invention, step S130 further includes:

step S131, during the first time, sequentially traversing all the through response calibration scripts, searching all 1-port calibration scripts of the same source switch channel and the same target switch channel based on the switch channels of all the through response calibration scripts, if the all 1-port calibration scripts are found, generating all 2-port calibration scripts based on two switch channels, and deleting the combined all 1-port calibration scripts;

and step S132, sequentially traversing all the remaining through response calibration scripts during next traversal, searching all 1-port calibration scripts of the same source switch channel or the same target switch channel, if the all 1-port calibration scripts are searched, generating enhanced response calibration scripts based on two switch channels, and deleting the combined all 1-port calibration scripts.

For the through response calibration script that does not find the full 1-port calibration script of the same source switch channel or the same target switch channel, no processing is performed, and the through response calibration script is directly used as a final target calibration script together with the full 2-port calibration script and the enhanced response calibration script, as the through response calibration script in the following table 6, the through response calibration script in the table is the full 1-port calibration script that does not find the same source switch channel or the same target switch channel, and is directly used as the target calibration script.

For example, for the isolation of the source switch channel 1 and the target switch channel 2, since the pass-through response calibration scripts are generated between the switch channels 1-2, the first pass searches whether all 1-port calibration scripts of the switch channels 1 and 2 exist in the temporary calibration script, and if so, all 2-port calibration scripts of the switch channels 1-2 are generated.

For the coupling phase or the coupling amplitude of the source switch channel 0 and the target switch channel 4, if the first pass does not find the all-1-port calibration scripts of the switch channel 0 and the switch channel 4 at the same time, the second pass searches the all-1-port calibration scripts of the switch channel 0 or the switch channel 4 in the temporary storage calibration scripts, and if the all-1-port calibration scripts of the switch channel 0 or the switch channel 4 are found, the enhanced response calibration scripts of the switch channels 0-4 are generated.

In the embodiment of the present invention, the process of reconstructing the temporary calibration script is also applicable to the process of reconstructing temporary scripts of other test frequencies, and the description of the embodiment of the present invention is omitted.

Step S140, executing the calibration script to implement calibration.

In the embodiment of the invention, after the reconfiguration of the calibration script is completed, the calibration is executed according to the corresponding calibration script.

Fig. 5 is a flowchart illustrating a detailed step of step S140 of a calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 5, a specific calibration executing process of the calibration method according to an embodiment of the present invention is as follows:

step S141, based on different calibration scripts, connecting corresponding switch channels;

the embodiment of the invention comprises 4 calibration scripts which are a full 2-port calibration script, an enhanced response calibration script, a direct response calibration script and a full 1-port calibration script.

The number of switch channels corresponding to different calibration scripts is different. Like a full 2-port calibration script, an enhanced response calibration script and a through response calibration script, the number of corresponding switch channels is two. The number of switch channels corresponding to the full 1-port calibration script is 1;

different calibration scripts may also have different numbers of measured port scattering parameters.

The number of scattering parameters to be measured corresponding to the full 2-port calibration script is 3, namely the scattering parameters of the two ports and the scattering parameters between the two antenna ports.

The number of scattering parameters to be measured corresponding to the image enhancement calibration script is 2, and the scattering parameters are respectively the scattering parameters of the source antenna port or the target antenna port and the scattering parameters between the two antenna ports.

The number of scattering parameters to be measured corresponding to the through-response calibration script is 1, and the scattering parameters are scattering parameters between two antenna ports.

The number of scattering parameters to be measured corresponding to the all-1-port calibration script is also 1, and the scattering parameters are scattering parameters of a source antenna port or a target antenna port.

Step S142, measuring a standard load;

in the embodiment of the invention, different calibration scripts have different standard loads when measurement is performed. See in particular the following steps S140-A2, S140-B2, S140-C2, S140-D2.

Step S143, obtaining error coefficients corresponding to different calibration scripts;

the error coefficients for each different calibration script are also different. See in particular the following steps S140-A3, S140-B3, S140-C3, S140-D3.

And step S144, storing the error coefficient by taking the switch channel as an index.

Fig. 6 is a flowchart illustrating a calibration procedure of a full 2-port calibration script of a calibration method for scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 6, a specific calibration execution process of the full 2-port calibration script according to the calibration method according to the embodiment of the present invention is as follows:

step S140-A1, when the calibration script is a full 2-port calibration script, connecting two corresponding switch channels;

step S140-A2, measuring an open circuit load, a short circuit load, a matched load and a through load between two switch channels respectively;

step S140-A3, obtaining error coefficients corresponding to the full 2-port calibration script, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER, a directional error ED, a load matching error EL, a transmission tracking error ET and an isolation error EX;

and step S140-A4, storing error coefficients by taking two switching channels as indexes.

Fig. 7 is a flowchart illustrating a calibration procedure of an enhanced response calibration script of a calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 7, a specific calibration execution process of the calibration method according to the embodiment of the present invention is as follows:

and S140-B1, when the calibration script is the enhanced response calibration script, communicating the two corresponding switch channels, wherein the communication of the switch channels of the two ports means that the two antenna ports are not only physically connected, but also are communicated with the two switch channels in a one-to-one manner.

Step S140-B2, measuring an open circuit load, a short circuit load and a matched load on a source switch channel or a target switch channel, and measuring a through load between the two switch channels;

and if the single-port scattering parameters to be measured are the scattering parameters of the port corresponding to the source switch channel, measuring the open-circuit load, the short-circuit load and the matched load on the source switch channel, and otherwise, measuring the open-circuit load, the short-circuit load and the matched load on the target switch channel.

Step S140-B3, obtaining error coefficients corresponding to the enhanced response calibration script, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER, a directional error ED, a transmission tracking error ET and an isolation error EX;

step S140-B4, storing error coefficients by taking two switch channels as indexes;

fig. 8 is a flowchart illustrating a calibration procedure of a through-response calibration script of a calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 8, a specific calibration execution process of the calibration method according to the embodiment of the present invention for the through-response calibration script is as follows:

step S140-C1, when the calibration script is a through response calibration script, connecting the two corresponding switch channels;

step S140-C2, measuring a through load between two switch channels;

step S140-C3, obtaining an error coefficient corresponding to the through response script, wherein the error coefficient comprises a transmission tracking error ET and an isolation error EX;

step S140-C4, storing error coefficients by taking two switch channels as indexes;

fig. 9 is a flowchart illustrating calibration steps of a calibration script of a total 1-port calibration method for a scattering parameter of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 9, a specific calibration execution process of the calibration method according to the embodiment of the present invention for the total 1-port calibration script is as follows:

and S140-D1, when the calibration script is a full 1-port calibration script, communicating a corresponding switch channel, wherein communicating the corresponding switch channel means that the antenna port realizes both physical connection and one-to-one communication with the switch channel.

Step S140-D2, measuring an open circuit load, a short circuit load and a matched load on a switch channel;

step S140-D3, obtaining error coefficients corresponding to the all-1-port calibration program, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER and a directional error ED;

step S140-D4, an error coefficient is stored with a switch channel as an index.

The calibration method for the scattering parameters of the multi-port antenna provided by the embodiment of the invention realizes the multiplexing of error coefficients, thereby effectively reducing the calibration steps, avoiding the use of expensive electronic calibration parts and reducing the calibration time by half.

The implementation process of the calibration method for scattering parameters of a multi-port antenna of the present invention is described below by taking a 4-port antenna as an example:

for example, assume the scattering parameters to be measured are as shown in the following table:

serial number	Parameter name	Test frequency (MHz)	Antenna port	Switch channel (Source channel-target channel)
					1	Magnitude of coupling	1880-2010	CAL – P1	0 - 1
2	Coupled phase	1880-2010	CAL – P1	0 - 1
					3	Magnitude of coupling	1880-2010	CAL – P2	0 - 2
4	Coupled phase	1880-2010	CAL – P2	0 - 2
					5	Magnitude of coupling	1880-2010	CAL – P3	0 - 3
6	Coupled phase	1880-2010	CAL – P3	0 - 3
					7	Magnitude of coupling	1880-2010	CAL – P4	0 - 4
8	Coupled phase	1880-2010	CAL – P4	0 - 4
					9	Degree of isolation	1880-2010	P1 – P2	1 - 2
10	Degree of isolation	1880-2010	P2 – P3	2 - 3
					11	Degree of isolation	1880-2010	P3 – P4	3 - 4
12	Degree of isolation	1880-2010	P1 – P4	1 - 4
					13	Standing wave ratio	1880-2010	CAL	0
14	Standing wave ratio	1880-2010	P1	1
					15	Standing wave ratio	1880-2010	P2	2
16	Standing wave ratio	1880-2010	P3	3
					17	Standing wave ratio	1880-2010	P4	4

TABLE 2 Scattering parameters to be measured

Firstly, scattering parameters to be measured in table 2 are obtained, with serial numbers 1 to 12 being dual-port scattering parameters, and serial numbers 13 to 17 being single-port scattering parameters. Each parameter to be tested includes a parameter name, a test frequency, an antenna port and a switch channel, the switch channel includes a source switch channel and a target switch channel, the left side of a switch channel field in table 2 is the source switch channel, and the right side is the target switch channel.

The traversal process is shown in table 3 below:

step (ii) of	Judgment of	Treatment of
			1	Taking the index of item 1, finding no through-response calibration script of 0-1	Generating a pass-through response calibration script for channels 0-1, temporarily storing 1
2	Taking index 2, find that there is already a through response calibration script of 0-1	Skip over
			3	Taking index 3, finding no through-response calibration script of 0-2	Generating a pass-through response calibration script for channels 0-2, temporarily storing 2
4	Taking index 4, find that there is already a through response calibration script of 0-2	Skip over
			5	Taking the 5 th index, and finding no through response calibration script of 0-3	Generating a pass-through response calibration script for channels 0-3, temporarily storing 3
6	Taking the 6 th indexThere are already 0-3 pass-through response calibration scripts	Skip over
			7	Taking the 7 th index, and finding no through response calibration script of 0-4	Generating a pass-through response calibration script for channels 0-4, temporarily storing 4
8	Taking index 8, find that there is already a through response calibration script of 0-4	Skip over
			9	Taking the 9 th index, finding no 1-2 through response calibration script	Generating a pass-through response calibration script for channels 1-2, temporarily storing 5
10	Taking the 10 th index, finding no 2-3 through response calibration script	Generating a pass-through response calibration script for channels 2-3, temporarily storing 6
			11	Taking the 11 th index, and finding no 3-4 through response calibration script	Generating a pass-through response calibration script for channels 3-4, temporary storage 7
12	Taking the 12 th index, finding no through-response calibration script of 1-4	Generating a pass-through response calibration script for channels 1-4, temporarily storing 8
			13	Get the 13 th index, find all 1 mouth calibration script of 0 not	Generating a full 1-port calibration script of 0, temporarily storing 9
14	Get the 14 th index, find 1 all 1 mouth calibration script	Generating 1 all-1 port calibration script, temporarily storing 10
			15	Get the 15 th index, find 2 all 1 mouth calibration script	Generating 2 all 1 port calibration script, temporarily storing 11
16	Get the 16 th index, find all 1 mouth calibration script of 3 not	Generating 3 all 1 port calibration script, temporarily storing 12
			17	Get the 17 th index, find 4 all 1 mouth calibration scripts	Generating 4 all-1-port calibration scripts and temporarily storing 13

TABLE 3 traversal Process of Scattering parameters to be measured

And traversing the scattering parameters to be tested under the test frequency of 1880-2010MHz, generating a through-response calibration script by using the double-port scattering parameters with the serial numbers 1-12, generating a full-1-port calibration script by using the serial numbers 13-17, and taking the through-response calibration script and the full-1-port calibration script as temporary storage calibration scripts at the moment. The list of the scratch calibration scripts is shown in table 4 below:

serial number	Switch channel index	Calibration script	Script sequence number
				1	0-1	Pass-through response calibration script	Temporary storage	1
2	0-2	Pass-through response calibration script	Temporary storage 2
				3	0-3	Pass-through response calibration script	Temporary storage 3
4	0-4	Pass-through response calibration script	Temporary storage 4
				5	1-2	Pass-through response calibration script	Temporary storage 5
6	2-3	Pass-through response calibration script	Temporary storage 6
				7	3-4	Pass-through response calibration script	Temporary storage 7
8	1-4	Pass-through response calibration script	Temporary storage 8
				9	0	All 1 port calibration script	Temporary storage 9
10	1	All 1 port calibration script	Temporary storage 10
				11	2	All 1 port calibration script	Temporary storage 11
12	3	All 1 port calibration script	Temporary storage 12
				13	4	All 1 port calibration script	Temporary storage 13

Table 4 temporary storage of calibration scripts

The script reassembly process is shown in table 5 below:

step (ii) of	Judgment of	Treatment of
			1	A first round of traversal: taking temporary storage 1, matching switch channels to temporary storage 9 and temporary storage 10	Upgrading temporary storage 1 into full 2-port calibration script, deleting temporary storage 9 and temporary storage 10
2	Taking temporary storage 2, channel 0 is used	Not processing, temporarily storing 2 a keep-pass response calibration script;
			3	taking temporary storage 3, channel 0 is used	Not processing, temporarily storing 3 a keep-pass response calibration script;
4	taking temporary storage 4, channel 0 is used	Not processing, temporarily storing 4 a direct response calibration script;
			5	taking temporary storage 5, the channel 1 is used	Not processed, scratch 5 keep-through response calibration script
6	Taking out the temporary storage 6, matching to the temporary storage 11 and the temporary storage 12	The temporary storage 6 is upgraded into a full 2-port calibration script, and the temporary storage 11 and the temporary storage 12 are deleted
			7	Taking temporary storage 7 and using channel 3	Not processed, scratch 7 holds pass-through response calibration script
8	Taking out the temporary storage 8 and using the channel 1	Not processing, temporarily storing 8 a direct response calibration script;
			9	and a second round of traversal: taking the temporary storage 7, and matching to the temporary storage 13 regardless of whether the channel is used or not	Staging 7 to an enhanced response calibration script, deleting 13 staging
10	Taking out temporary storage 8 without all 1 port calibration script	Not processing, temporarily storing 8 a direct response calibration script;

TABLE 5 calibration script reassembly procedure

The list of target calibration scripts is shown in table 6 below:

serial number	Channel	Script sequence number	Calibration type
					1	0-1	Temporary storage 1	Full 2-port calibration script
2	2-3	Temporary storage 6	Full 2-port calibration script
				3	0-2	Temporary storage 2	Pass-through response calibration script
4	0-3	Temporary storage 3	Pass-through response calibration script
				5	0-4	Temporary storage 4	Pass-through response calibration script
6	1-2	Temporary storage 5	Pass-through response calibration script
				7	3-4	Temporary storage 7	Enhanced response calibration script
8	1-4	Temporary storage 8	Pass-through response calibration script

Table 6 temporary storage of calibration scripts

Example 2

Fig. 10 is a block diagram illustrating a structure of a calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 10, the calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention includes:

an obtaining module 110, configured to obtain scattering parameters to be measured, where each scattering parameter to be measured includes: the device comprises a parameter name, test frequency, antenna ports and switch channels, wherein each antenna port corresponds to one switch channel, and the switch channels are one or two of a source switch channel and a target switch channel;

the script generation module 120 is configured to traverse various scattering parameters to be detected at the same test frequency, generate a direct response calibration for the scattering parameters to be detected between two different antenna ports that are not identical, and generate a full 1-port calibration script for the scattering parameters to be detected of different single antenna ports;

the script recombination module 130 is configured to combine each through-response calibration script with a full-1-port calibration script of the same source switch channel and/or the same target switch channel thereof to generate a full-2-port calibration script or an enhanced response calibration script at the same test frequency;

and the script execution module 140 is used for executing the calibration script to realize calibration.

The implementation process of the embodiment of the present invention refers to the foregoing calibration method, and details are not described here.

The calibration system for the scattering parameters of the multi-port antenna provided by the embodiment of the invention realizes the multiplexing of error coefficients, thereby effectively reducing the calibration steps, avoiding the use of expensive electronic calibration parts and reducing the calibration time by half.

Fig. 11 is a block diagram illustrating a structure of a script generating module 120 of a calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 11, the script generating module 120 includes:

the detection unit 121 is configured to traverse each scattering parameter to be detected at the same test frequency, and detect the number of switch channels corresponding to the scattering parameter to be detected;

a temporary storage script generating unit 122, configured to generate a direct connection response calibration script based on two incompletely identical switch channels if the number of the switch channels is two; and if the number of the switch channels is 1, generating a full 1-port calibration script based on different single switch channels.

Fig. 12 is a block diagram illustrating a configuration of a script re-organizing module 130 of a calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 12, the calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention includes:

the first script upgrading unit 131 is configured to sequentially traverse all the pass-through response calibration scripts during a first pass, search all 1-port calibration scripts of the same source switch channel and the same target switch channel based on the switch channels of each pass-through response calibration script, upgrade the pass-through response calibration scripts based on every two switch channels into a full 2-port calibration script if the all 1-port calibration scripts are found, and delete the merged full 1-port calibration scripts;

the second script upgrading unit 132 is configured to sequentially traverse all remaining through response calibration scripts during next traversal, and search for all 1-port calibration scripts of the same source switch channel or the same target switch channel; and if the direct connection response calibration scripts of the two switch channels are found, upgrading the direct connection response calibration scripts of the two switch channels into enhanced response calibration scripts, and deleting the combined all-1-port calibration scripts.

Fig. 13 is a block diagram illustrating a script execution module 140 of a calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 13, the script execution module 140 includes:

a connection unit 141 for connecting corresponding switch channels based on different calibration scripts;

a measuring unit 142 for measuring a standard load;

an obtaining unit 143, configured to obtain error coefficients corresponding to different calibration scripts;

and a storage unit 144 for storing the error coefficient by using the switch channel as an index.

In the calibration system of the embodiment of the present invention, the calibration script includes: a full 2-port calibration script, an enhanced response calibration script, a straight-through response calibration script and a full 1-port calibration script;

the standard load includes: open circuit load, short circuit load, matched load and through load;

the communication unit 141 is configured to communicate the two corresponding switch channels when the calibration script is a full 2-port calibration script;

a measuring unit 142, configured to measure an open-circuit load, a short-circuit load, a matching load, and a through load between the two switch channels, respectively;

the obtaining unit 143 is configured to obtain error coefficients corresponding to the full 2-port calibration script, where the error coefficients include a source matching error ES, a reflection tracking error ER, a directional error ED, a load matching error EL, a transmission tracking error ET, and an isolation error EX;

a storage unit 144, configured to store an error coefficient by using two switching channels as indexes;

a communication unit 141, which communicates the two corresponding switch channels when the calibration script is the enhanced response calibration script;

a measuring unit 142, configured to measure an open-circuit load, a short-circuit load, and a matching load on a source switch channel or a target switch channel, and measure a through load between the two switch channels;

the obtaining unit 143 is configured to obtain error coefficients corresponding to the full 2-port calibration script, where the error coefficients include a source matching error ES, a reflection tracking error ER, a directional error ED, a transmission tracking error ET, and an isolation error EX;

a communication unit 141, which communicates the two corresponding switch channels when the calibration script is a direct response script;

a measurement unit 142 for measuring the through load between the two switch channels;

an obtaining unit 143, configured to obtain an error coefficient corresponding to the pass-through response script, where the error coefficient includes a transmission tracking error ET and an isolation error EX;

a communicating unit 141, which communicates a corresponding switch channel when the calibration script is a full 1-port calibration script;

a measuring unit 142 for measuring an open load, a short load and a matched load on the switching channel;

an obtaining unit 143, configured to obtain error coefficients corresponding to all 1-port calibration programs, where the error coefficients include a source matching error ES, a reflection tracking error ER, and a directional error ED;

the storage unit 144 is configured to store the error coefficient with one switching channel as an index.

According to the multi-port scattering parameter calibration system and method provided by the embodiment of the invention, most of single-port scattering parameter calibration is combined into full 2-port calibration, and calibration steps are effectively reduced. Compared with a control system, when the same smart antenna is measured, the calibration steps are reduced from 37 steps to 20 steps, and the calibration time is reduced from more than 30 minutes to less than 15 minutes.

Example 3

Fig. 14 is a flowchart illustrating steps of a method for testing scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 14, the method for testing scattering parameters of a multi-port antenna according to an embodiment of the present invention includes:

step 210, testing double-port scattering parameters, wherein switch channels corresponding to the double-port scattering parameters comprise a source switch channel and a target switch channel;

step 220, when the dual-port scattering parameter test is executed, if the single-port scattering parameters of the same source switch channel and/or the same target switch channel exist, the communication state of the two switch channels is kept unchanged, and the single-port scattering parameters of the same source switch channel and/or the same target switch channel are measured.

In the prior art, each time a port index measurement is performed, a corresponding switch channel needs to be switched, that is, one index measurement is performed, that is, a switch is switched once. In order to reduce the switching times, in the embodiment of the invention, when the port index is measured, according to the port index and the calibration type, a test flow of the dual-port scattering parameter between the two ports is executed first, the connection state of the two ports and the two switch channels is kept unchanged, and a test flow of the single-port scattering parameter of a single port is executed at the same time.

According to the method for measuring the scattering parameters of the multi-port antenna, provided by the embodiment of the invention, when the port indexes are measured, the double-port scattering parameters are measured, meanwhile, the single-port scattering parameters with the same port name are searched under the condition of matching of calibration types, and meanwhile, the single-port scattering parameters are measured, namely, a single-switch can measure multiple indexes, the switching times of the switch are reduced, the test time is reduced, and the aging of the switch is reduced.

Fig. 15 is a flowchart illustrating steps of a method for testing scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 15, the method for testing scattering parameters of a multi-port antenna according to an embodiment of the present invention, step 210, performs a test of dual-port scattering parameters, specifically:

step S211, acquiring two scattering parameters to be detected with the number of switch channels;

step S212, inquiring the error coefficient according to the switch channel and recovering the error coefficient;

step S213, identifying the calibration type according to the combination of the inquired error coefficients;

and step S214, communicating the corresponding two switch channels, and executing the test of the double-port scattering parameters.

The embodiment of the invention provides a method for testing scattering parameters of a multi-port antenna, wherein error coefficients comprise: source matching error ES, reflection tracking error ER, directivity error ED, load matching error EL, transmission tracking error ET and isolation error EX;

the method for testing the scattering parameters of the multi-port antenna provided by the embodiment of the invention identifies the calibration type according to the combination of the inquired error coefficients, and specifically comprises the following steps:

when the combination of the error coefficients is a transmission tracking error ET and an isolation error EX, the calibration type is a straight-through response calibration;

when the combination of the error coefficients is a source matching error ES, a reflection tracking error ER and a directional error ED, the calibration type is all 1-port calibration;

when the combination of the error coefficients is a source matching error ES, a reflection tracking error ER, a directional error ED, a transmission tracking error ET and an isolation error EX, the calibration type is enhanced response calibration;

when the combination of the error coefficients is source matching error ES, reflection tracking error ER, directional error ED, load matching error EL, transmission tracking error ET and isolation error EX, the calibration type is full 2-port calibration.

Fig. 16 is a diagram illustrating a main control interface of an 8-port antenna according to an embodiment of the present invention. As shown in fig. 16, a test procedure of calibration types (full 2-port calibration, through-response calibration, enhanced response calibration) including a two-port scattering parameter and a single-port scattering parameter is described below by taking the measurement of the isolation between the ports 2 to 3 as an example.

TABLE 7

Antenna port	Calibration port	Port	1	Port 2	Port 3	Port 4	Port 5	Port 6	Port 7	Port 8
											Switch channel	0	1	2	3	4	5	6	7	8

Table 78 mapping relationship between port antennas and switch channels

Before testing, all antenna ports are connected to corresponding switch channels, the mapping relationship between the antenna ports and the switch channels is shown in table 7, the ports 2 and 3 are connected to the test port 1 and the test port 2 of the network analyzer, at this time, the switch channel 2 is connected to the port 2 of the antenna, the switch channel 3 is connected to the antenna port 3, and the isolation degree S21 from the port 3 to the port 2 is obtained through measurement.

At this time, if the calibration type is the all 2-port calibration, since the antenna ports 2 and 3 are in the connected state, the standing wave ratio of the port 2 and the port 3 can be obtained by reading the isolation S21 from the port 3 to the port 2. At this time, the standing-wave ratio of the port 2 and the port 3 is obtained, a test action is not required, and only the isolation degree S21 from the port 3 to the port 2 is required to be read, so that the single-port scattering parameter test is put into the double-port scattering parameter test, and the purpose is to reduce the switching times of the switch. Originally, 3 port indexes were tested: the isolation from the port 2 to the port 3, the standing-wave ratio of the port 2 and the standing-wave ratio of the port 3 need to be switched for 3 times, and the testing of the indexes of the 3 ports can be completed by switching the switching channels once.

If the calibration type is a pass-through response calibration, only the isolation from the port 2 to the port 3 can be measured, and the standing-wave ratio of any one of the port 2 and the port 3 cannot be obtained.

If the calibration type is enhanced response calibration, the standing-wave ratio of one of the port 2 or the port 3 can be obtained in addition to the isolation from the port 2 to the port 3. As for whether to measure which port is the source switch channel or the target switch channel, if the port to be measured is the source switch channel 2, the standing wave ratio of the port 2 can be obtained in addition to the isolation from the port 2 to the port 3.

For antennas with a single number of antenna ports, after all dual-port scattering parameter measurements are made (some single-port scattering parameters will be measured simultaneously), a complementary measurement is made of the single-port scattering parameters that have not yet been measured. The single-port scattering parameters that are measured additionally at this time are different from the single-port scattering parameters that are measured synchronously when the dual-port scattering parameters are measured.

The method for measuring the single-port scattering parameter of the single port includes the following specific steps:

and communicating the switch channel of the antenna port, and measuring the single-port scattering parameter of the port.

Example 4

Fig. 1 is a block diagram illustrating a structure of a calibration system for scattering parameters of a multi-port antenna according to an embodiment of the present invention, and referring to fig. 1, a system for testing multi-port scattering parameters according to an embodiment of the present invention includes: the network analyzer, the microwave switch matrix and the main control computer are provided with the calibration method, wherein the network analyzer is in communication connection with the switch matrix, and the switch matrix is in communication connection with the tested piece.

Specifically, the multi-port antenna (device under test) has N ports.

The switch matrix has 2 input ports and N output ports, wherein the 2 input ports of the switch matrix are connected to 2 test interfaces of the network analyzer. One of the N output ports is a calibration port, and before testing, the N antenna ports (containing 1 calibration port) are all connected to the N ports of the switch matrix in a one-to-one correspondence manner.

Before testing, all ports of the tested device (multi-port antenna) are connected to the corresponding switch channels, and the connection is only the connection on the physical line.

In the embodiment of the invention, the error coefficient is stored in the master control computer by taking the switch channel as an index. The antenna ports and the switch channels of the switch matrix are in one-to-one mapping relation. Therefore, the error coefficient can be inquired according to the unique mapping relation between the antenna port and the switch channel.

The multi-port antenna scattering parameter measuring system provided by the embodiment of the invention can firstly measure the double-port scattering parameter when the port index is measured, and simultaneously search the single-port scattering parameter with the same port name under the condition of matching the calibration types while measuring the double-port scattering parameter, and simultaneously measure the single-port scattering parameter, namely, a one-time switch can measure multiple indexes, thereby reducing the switching times of the switch, reducing the testing time and reducing the aging of the switch.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A method for calibrating a scattering parameter of a multiport antenna, comprising:

acquiring scattering parameters to be detected, wherein each scattering parameter to be detected comprises: the device comprises a parameter name, a test frequency, antenna ports and switch channels, wherein each antenna port corresponds to one switch channel, and the switch channels are one or two of a source switch channel and a target switch channel;

traversing all scattering parameters to be tested at the same test frequency, generating direct response calibration for the scattering parameters to be tested between two antenna ports which are not identical, and generating full 1-port calibration scripts for the scattering parameters to be tested of different single antenna ports;

under the same test frequency, recombining each through response calibration script with the full-1 port calibration script of the same source switch channel and/or the same target switch channel to generate a full-2 port calibration script or an enhanced response calibration script;

and executing the calibration script to realize calibration.

2. The calibration method according to claim 1, wherein traversing each scattering parameter to be measured, generating a direct response calibration for the scattering parameter to be measured between two antenna ports, and generating a full 1-port calibration script for the scattering parameter to be measured of one antenna port, specifically:

traversing each scattering parameter to be tested under the same testing frequency, and detecting the number of switch channels corresponding to the scattering parameter to be tested;

if the number of the switch channels is two, generating a direct connection response calibration script based on two incompletely identical switch channels;

if the number of the switch channels is 1, generating a total 1-port calibration script based on different single switch channels.

3. The calibration method according to claim 1 or 2, wherein, at the same test frequency, the pass-through response calibration script is recombined with the full-1 port calibration script of the same source switch channel and/or the same target switch channel to generate a full-2 port calibration script or an enhanced response calibration script, specifically:

during the first pass, sequentially traversing all the through response calibration scripts, searching all 1-port calibration scripts of the same source switch channel and the same target switch channel based on the switch channels of all the through response calibration scripts, upgrading the through response calibration scripts of every two switch channels into all 2-port calibration scripts if the through response calibration scripts are searched, and deleting the combined all 1-port calibration scripts;

when traversing next time, sequentially traversing all the residual straight-through response calibration scripts, and searching all 1-port calibration scripts of the same source switch channel or the same target switch channel; and if the direct connection response calibration scripts of the two switch channels are found, upgrading the direct connection response calibration scripts of the two switch channels into enhanced response calibration scripts, and deleting the combined all-1-port calibration scripts.

4. The calibration method according to claim 1, wherein the calibration script is executed to perform calibration, specifically:

based on different calibration scripts, communicating corresponding switch channels;

measuring a standard load;

acquiring error coefficients corresponding to different calibration scripts;

and saving the error coefficient by taking the switch channel as an index.

5. The calibration method according to claim 4, comprising: the calibration script includes: a full 2-port calibration script, an enhanced response calibration script, a straight-through response calibration script and a full 1-port calibration script;

the standard load comprises: open circuit load, short circuit load, matched load and through load;

when the calibration script is a full 2-port calibration script, communicating two corresponding switch channels;

respectively measuring an open-circuit load, a short-circuit load, a matched load and a through load between the two switch channels;

acquiring error coefficients corresponding to the full 2-port calibration script, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER, a directional error ED, a load matching error EL, a transmission tracking error ET and an isolation error EX;

storing the error coefficients by taking two switching channels as indexes;

when the calibration script is the enhanced response calibration script, communicating two corresponding switch channels;

measuring an open-circuit load, a short-circuit load and a matched load on a source switch channel or a target switch channel, and measuring a through load between the two switch channels;

acquiring error coefficients corresponding to the full 2-port calibration script, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER, a directional error ED, a transmission tracking error ET and an isolation error EX;

storing the error coefficients by taking two switching channels as indexes;

when the calibration script is a direct connection response script, connecting the two corresponding switch channels;

measuring a shoot-through load between two of said switch channels;

acquiring an error coefficient corresponding to the straight-through response script, wherein the error coefficient comprises a transmission tracking error ET and an isolation error EX;

storing error coefficients by taking two switch channels as indexes;

when the calibration script is a full 1-port calibration script, communicating a corresponding switch channel;

measuring an open circuit load, a short circuit load and a matched load on the switch channel;

acquiring error coefficients corresponding to the all-1-port calibration program, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER and a directional error ED;

and saving the error coefficient by taking one switching channel as an index.

6. A calibration system for a scattering parameter of a multiport antenna, comprising:

the acquisition module is used for acquiring scattering parameters to be detected, and each scattering parameter to be detected comprises: the device comprises a parameter name, a test frequency, antenna ports and switch channels, wherein each antenna port corresponds to one switch channel, and the switch channels are one or two of a source switch channel and a target switch channel;

the script generation module is used for traversing various scattering parameters to be tested under the same test frequency, generating direct response calibration for the scattering parameters to be tested between two antenna ports which are not identical, and generating all 1-port calibration scripts for the scattering parameters to be tested of different single antenna ports;

the script recombination module is used for combining each through-response calibration script with the full-1-port calibration script of the same source switch channel and/or the same target switch channel of the through-response calibration script to generate a full-2-port calibration script or an enhanced response calibration script under the same test frequency;

7. The calibration system of claim 6, wherein the script generation module comprises:

the detection unit is used for traversing various scattering parameters to be detected under the same test frequency and detecting the number of switch channels corresponding to the scattering parameters to be detected;

the temporary storage script generation unit is used for generating a direct connection response calibration script based on two incompletely identical switch channels if the number of the switch channels is two; and if the number of the switch channels is 1, generating a full 1-port calibration script based on different single switch channels.

8. The calibration system according to claim 6 or 7, wherein the script reorganization module comprises:

the first script upgrading unit is used for sequentially traversing all the through response calibration scripts during the first pass, searching all 1-port calibration scripts of the same source switch channel and the same target switch channel based on the switch channels of all the through response calibration scripts, upgrading the through response calibration scripts based on two switch channels into all 2-port calibration scripts if the through response calibration scripts are searched, and deleting the combined all 1-port calibration scripts;

the second script upgrading unit is used for sequentially traversing all the residual through response calibration scripts and searching all 1-port calibration scripts of the same source switch channel or the same target switch channel during next traversal; and if the direct connection response calibration scripts of the two switch channels are found, upgrading the direct connection response calibration scripts of the two switch channels into enhanced response calibration scripts, and deleting the combined all-1-port calibration scripts.

9. The calibration system of claim 6, wherein the script execution module comprises:

the communication unit is used for communicating the corresponding switch channels based on different calibration scripts;

a measuring unit for measuring a standard load;

the acquisition unit is used for acquiring error coefficients corresponding to different calibration scripts;

and the storage unit is used for storing the error coefficient by taking the switch channel as an index.

10. The calibration system of claim 9, wherein the calibration script comprises: a full 2-port calibration script, an enhanced response calibration script, a straight-through response calibration script and a full 1-port calibration script;

the communication unit is used for communicating the two corresponding switch channels when the calibration script is a full 2-port calibration script;

the measuring unit is used for measuring an open-circuit load, a short-circuit load, a matched load and a through load between the two switch channels on the two switch channels respectively;

the acquiring unit is used for acquiring error coefficients corresponding to the full 2-port calibration script, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER, a directional error ED, a load matching error EL, a transmission tracking error ET and an isolation error EX;

the storage unit is used for storing the error coefficient by taking two switching channels as indexes;

the communication unit is used for communicating the two corresponding switch channels when the calibration script is the enhanced response calibration script;

the measuring unit is used for measuring an open-circuit load, a short-circuit load and a matched load on a source switch channel or a target switch channel and measuring a through load between the two switch channels;

the acquiring unit is used for acquiring error coefficients corresponding to the full 2-port calibration script, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER, a directional error ED, a transmission tracking error ET and an isolation error EX;

the communication unit is used for communicating the two corresponding switch channels when the calibration script is a direct-connection response script;

the measuring unit is used for measuring a through load between the two switch channels;

the obtaining unit is used for obtaining an error coefficient corresponding to the pass-through response script, wherein the error coefficient comprises a transmission tracking error ET and an isolation error EX;

the storage unit is used for storing error coefficients by taking two switching channels as indexes;

the communication unit is used for communicating a corresponding switch channel when the calibration script is a full 1-port calibration script;

the measuring unit is used for measuring an open-circuit load, a short-circuit load and a matched load on the switch channel;

the acquiring unit is used for acquiring error coefficients corresponding to the all-1-port calibration program, wherein the error coefficients comprise a source matching error ES, a reflection tracking error ER and a directional error ED;

and the storage unit is used for storing the error coefficient by taking one switching channel as an index.

11. A multi-port antenna scattering parameter testing method is characterized by comprising the following steps:

when the dual-port scattering parameter test is executed, if single-port scattering parameters of the same source switch channel and/or the same target switch channel exist, the communication state of the two switch channels is kept unchanged, and the single-port scattering parameters of the same source switch channel and/or the same target switch channel are measured.

12. The test method according to claim 11, wherein the test of the two-port scattering parameters is performed by:

acquiring scattering parameters to be detected, wherein the number of the switch channels is two;

inquiring error coefficients according to the switching channels and recovering the error coefficients;

identifying a calibration type according to the combination of the inquired error coefficients;

and communicating the corresponding two switch channels, and executing the test of the dual-port scattering parameters.

13. The test method of claim 12, wherein the error coefficients comprise: source matching error ES, reflection tracking error ER, directivity error ED, load matching error EL, transmission tracking error ET and isolation error EX;

identifying the calibration type according to the combination of the inquired error coefficients, specifically:

when the combination of the error coefficients is a transmission tracking error ET and an isolation error EX, the calibration type is a pass-through response calibration;

when the combination of the error coefficients is a source matching error ES, a reflection tracking error ER, a directional error ED, a load matching error EL, a transmission tracking error ET and an isolation error EX, the calibration type is full 2-port calibration.

14. A multi-port scattering parameter testing system, the testing system comprising: the calibration method as claimed in any one of claims 1 to 5 is installed on a network analyzer, a microwave switch matrix and a main control computer, wherein the network analyzer is in communication connection with the switch matrix, and the switch matrix is in communication connection with a tested piece.