CN106501776B - Phased array radar and phased array radar control method - Google Patents
Phased array radar and phased array radar control method Download PDFInfo
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- CN106501776B CN106501776B CN201610984091.6A CN201610984091A CN106501776B CN 106501776 B CN106501776 B CN 106501776B CN 201610984091 A CN201610984091 A CN 201610984091A CN 106501776 B CN106501776 B CN 106501776B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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Abstract
The embodiment of the invention discloses a phased array radar and a phased array radar control method, wherein the phased array radar comprises the following components: a plurality of waveguides each including a plurality of straight line portions and a plurality of arc portions, the straight line portions being connected to one another by the arc portions in each of the waveguides, center lines of the arc portions being coincident with center lines of corresponding straight line portions of adjacent waveguides, the plurality of straight line portions of the plurality of waveguides being parallel to one another; a plurality of antenna transmitters disposed at each of the straight portions of each of the waveguides; each phase shifter corresponds to one waveguide tube and is connected with the corresponding waveguide tube; and the metal wire is sequentially connected with the phase shifters. The embodiment of the invention can improve the scanning efficiency.
Description
Technical Field
The invention relates to the field of laser radars, in particular to a phased array radar and a phased array radar control method.
Background
The laser radar is a system for detecting characteristic quantities such as position, speed and the like of a target by emitting laser beams, and is widely applied to the field of laser detection. In order to accommodate two-dimensional and/or three-dimensional detection, the laser beam emitted by the lidar needs to be rotated. In order to achieve a rotation of the laser beam emitted by the lidar, there are two ways. One is to rotate the lidar itself by mechanical means and the second is to keep the lidar itself stationary or relatively stationary and only change the beam emitted by the lidar. A phased array radar is a radar that is stationary or relatively stationary in itself, with only the transmitted beam being altered.
A phased array radar generally includes: the laser transmitting and receiving array is used for transmitting and receiving multi-path laser; a thermo-optically tunable phase shifter for controlling the phase of the emitted light beam, i.e. for controlling the direction of the emitted light beam.
The one-dimensional phased array radar is a planar phased array radar, which is generally linear, as shown in fig. 1, and has the advantages of simple structure and low scanning efficiency.
Disclosure of Invention
The embodiment of the invention provides a phased array radar and a phased array radar control method, which can improve the scanning efficiency.
In order to solve the technical problem, the embodiment of the invention discloses the following technical scheme:
in one aspect, there is provided a phased array radar comprising:
a plurality of waveguides each including a plurality of straight line portions and a plurality of arc-shaped portions, the straight line portions being connected to one another by the arc-shaped portions in each of the waveguides, center lines of the arc-shaped portions being coincident with center lines of corresponding straight line portions of adjacent waveguides,
a plurality of straight line portions of the plurality of waveguides are parallel to each other;
a plurality of antenna transmitters disposed at each of the straight portions of each of the waveguides;
each phase shifter corresponds to one waveguide tube and is connected with the corresponding waveguide tube;
and the metal wire is sequentially connected with the phase shifters.
Optionally, the distance between the phase shifter and a plurality of adjacent phase shifters is equal.
Optionally, the arc-shaped part is smoothly connected with the linear part.
Optionally, the metal wire is connected to a power supply for controlling the input electric power.
Optionally, the phase of the phase shifter is controlled by a temperature, the temperature being controlled by the input electrical power.
Optionally, the phase difference of the radar emission beam is determined by the distance between two adjacent waveguide lines.
Optionally, the waveguide is silicon.
Optionally, the antenna transmitter is copper, or aluminum.
Optionally, the phase shifter is a silicon resistor with impurities.
In a second aspect, a method for controlling a phased array radar is provided, the method being applied to the above phased array radar, and the method including:
the metal line controls the input electric power, and the temperature of the phase shifter is controlled by the transmission power to control the phase of the emission beam.
The embodiment of the invention discloses a phased array radar, which comprises a plurality of waveguide tubes, a plurality of antenna emitters, a plurality of phase shifter metal wires and a plurality of waveguide tubes, wherein each waveguide tube comprises a plurality of linear parts and a plurality of arc-shaped parts; a plurality of antenna transmitters disposed at each of the straight portions of each of the waveguides; each phase shifter corresponds to one waveguide tube and is connected with the corresponding waveguide tube; and the metal wire is sequentially connected with the phase shifters. In the embodiment of the invention, one waveguide is changed into a plurality of waveguides, and in unit length, the length of the waveguide is increased, so that the number of the antenna emitters is increased, the number of emergent light beams is increased, and the scanning efficiency can be improved. In addition, in the embodiment of the invention, the number of the phase shifters is not increased, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a one-dimensional phased array radar in the prior art;
FIG. 2 is a schematic structural diagram of a phased array radar according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of two waveguides according to an embodiment of the present invention;
fig. 4 is a schematic diagram of phase angles according to an embodiment of the invention.
Detailed Description
The following embodiments of the present invention provide a phased array radar capable of improving scanning efficiency.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a schematic structural diagram of a phased array radar according to an embodiment of the present invention, and as shown in fig. 2, the phased array radar includes:
a plurality of waveguides 201, a plurality of antenna radiators 202, a plurality of phase shifters 203, and a metal line 204.
Each of the waveguides includes a plurality of straight line portions and a plurality of arc portions, the straight line portions are connected to another straight line portion by the arc portions, a center point of the arc portion is aligned with a center point of a corresponding straight line portion of an adjacent waveguide,
a plurality of straight line portions of the plurality of waveguides are parallel to each other;
a plurality of antenna radiators 202 provided in each straight portion of each waveguide;
a plurality of phase shifters 203, each phase shifter corresponding to one waveguide and connected to the corresponding waveguide;
and a metal line 204 connected to the plurality of phase shifters in turn.
Fig. 3 shows a schematic view of the structure of two adjacent waveguides, and as shown in fig. 3, for the waveguide 30, a straight portion 301 is connected to another straight portion 303 through an arc portion 302.
In fig. 3, the curved portion 302 of the waveguide 30 corresponds to the straight portion 311 of the waveguide 31, and thus the center line of the curved portion 302 coincides with the center line of the straight portion 311 of the waveguide 31. The dashed lines in fig. 3 indicate coincident center lines and do not represent actual structures.
In the embodiment of the invention, the distance between the phase shifter and the adjacent phase shifters is equal. As shown in fig. 3, the phase shifters in the embodiment of the present invention are circular ring-shaped, and the distances from the center of the phase shifter 2021 to the centers of the phase shifters 2022, 2023, 2024, and 2025 are equal.
Only two waveguide lines are shown in the embodiment of fig. 3, and typically one waveguide line will be adjacent to two waveguide lines and one phase shifter will be adjacent to six phase shifters, all at equal distances from the adjacent six phase shifters. The dashed lines connecting the phase shifters in fig. 3 are for illustrative purposes only and do not represent actual structures.
In the embodiment of the invention, the arc-shaped part is smoothly connected with the straight line part, and in practical application, the structure is formed by bending a waveguide tube and has no seam structure.
The arcuate portion may be a semi-arc or a circular arc.
In the embodiment of the invention, the waveguide is silicon; the antenna transmitter is copper, or aluminum; the phase shifter is a silicon resistor added with impurities.
The embodiment of the invention discloses a phased array radar, which comprises a plurality of waveguide tubes, a plurality of antenna emitters, a plurality of phase shifter metal wires and a plurality of waveguide tubes, wherein each waveguide tube comprises a plurality of linear parts and a plurality of arc-shaped parts; a plurality of antenna transmitters disposed at each of the straight portions of each of the waveguides; each phase shifter corresponds to one waveguide tube and is connected with the corresponding waveguide tube; and the metal wire is sequentially connected with the phase shifters. In the embodiment of the invention, one waveguide is changed into a plurality of waveguides, and in unit length, the length of the waveguide is increased, so that the number of the antenna emitters is increased, the number of emergent light beams is increased, and the scanning efficiency can be improved. In addition, in the embodiment of the invention, the number of the phase shifters is not increased, and the cost is reduced.
In the embodiment of the invention, the metal wire is connected with the power supply and used for controlling the input electric power.
The phase of the phase shifter is controlled by the temperature, which is controlled by the input electric power.
The phase difference of the radar emission beams is determined by the distance between two adjacent waveguide lines. As shown in fig. 4, the phase difference is determined by the distance between the waveguide lines 30 and 31. The dashed lines in fig. 4 are for illustrative distance only and do not represent structures that actually exist.
In the prior art, a phase diagram of a one-dimensional phased array radar is shown in fig. 1, and includes 0 °, 30 °, 60 °, and 90 °. In the phased array radar according to the embodiment of the present invention, the phase of the light beam controlled by each waveguide line is the same, and the phase of the light beam between different waveguide lines is different, as shown in fig. 4.
The phased array radar of the embodiment of the invention can be an 8 multiplied by 4 type silicon photon phased array radar and can be manufactured on the same chip. The phased array radar of the embodiment of the invention uses 32 antenna transmitters to emit light beams, 7 thermo-optic phase integrated tuners adjust phases, and the thermo-optic tuners are phase shifters controlled by temperature. In the embodiment of the present invention, under the condition that the total length is not changed, the number of the emergent beams is increased due to the increase of the antenna emitters, and the scanning efficiency is increased. Meanwhile, in the embodiment of the invention, the number of phase shifters of the phased array is doubled, and the electric power required to be input by each phase shifter is only half of that of the linear phased array. For example, linear shifters each require 10V inputs, the shifters in the embodiments of the present invention each require only 5V inputs. Because the input electric power that a single phase shifter can accept has the upper limit, the phase shifter of the embodiment of the invention has more total amount, can accept more electric power, has larger phase shift change, has larger beam steering angle and wider scanning range.
Corresponding to the one-dimensional phased array radar, the embodiment of the invention also discloses a phased array radar control method, which is applied to the phased array radar and comprises the following steps:
the metal line controls the input electric power, and the temperature of the phase shifter is controlled by the transmission power to control the phase of the emission beam.
The method of the embodiment of the invention increases the number of the emergent light beams, thereby improving the scanning efficiency.
The embodiment of the invention discloses a phased array radar, which comprises a plurality of waveguide tubes, a plurality of antenna emitters, a plurality of phase shifter metal wires and a plurality of waveguide tubes, wherein each waveguide tube comprises a plurality of linear parts and a plurality of arc-shaped parts; a plurality of antenna transmitters disposed at each of the straight portions of each of the waveguides; each phase shifter corresponds to one waveguide tube and is connected with the corresponding waveguide tube; and the metal wire is sequentially connected with the phase shifters. In the embodiment of the invention, one waveguide is changed into a plurality of waveguides, and in unit length, the length of the waveguide is increased, so that the number of the antenna emitters is increased, the number of emergent light beams is increased, and the scanning efficiency can be improved. In addition, in the embodiment of the invention, the number of the phase shifters is not increased, and the cost is reduced.
Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention may be implemented by software plus necessary general hardware, including general purpose integrated circuits, general purpose CPUs, general purpose memories, general purpose components, etc., or by special purpose hardware, including special purpose integrated circuits, special purpose CPUs, special purpose memories, special purpose components, etc., but the former is a better implementation in many cases. Based on such understanding, the technical solutions in the embodiments of the present invention may be substantially implemented or portions thereof that contribute to the prior art may be embodied in the form of a software product, which may be stored in a storage medium, such as a Read-Only Memory (ROM), a Random-Access Memory (RAM), a magnetic disk, an optical disk, and so on, and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute the method in the embodiments or some portions thereof.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A phased array radar, characterized in that the phased array radar comprises:
a plurality of waveguides each including a plurality of straight portions and a plurality of arc portions, the straight portions being connected to one another by the arc portions in each of the waveguides, a center line of the arc portion coinciding with a center line of a corresponding straight portion of an adjacent waveguide, phases of light beams controlled by each of the waveguides being the same, the light beams controlled by the plurality of waveguides having different phases, a phase difference between the light beams controlled by the plurality of waveguides being determined by a distance between the adjacent two waveguides;
a plurality of straight line portions of the plurality of waveguides are parallel to each other;
the antenna transmitters are arranged on each straight line part of each waveguide, the distances between each antenna transmitter and the adjacent antenna transmitters are equal, and the number of the antenna transmitters is 32;
each phase shifter corresponds to one waveguide tube and is connected with the corresponding waveguide tube, and the number of the phase shifters is 7;
and the metal wire is sequentially connected with the phase shifters.
2. The radar according to claim 1, wherein distances between the phase shifter and adjacent ones of the phase shifters are equal.
3. A radar as claimed in claim 1 or 2 wherein the arcuate portions are smoothly connected with the linear portions.
4. A radar as claimed in any one of claims 1 to 3 wherein the wire is connected to a power supply for controlling the input electrical power.
5. The radar of claim 4 wherein the phase of said phase shifter is controlled by temperature, said temperature being controlled by said input electrical power.
6. Radar according to any one of claims 1 to 5, wherein the waveguide is silicon.
7. Radar according to any one of claims 1 to 6, characterised in that the antenna transmitter is copper, or aluminium.
8. A radar as claimed in any one of claims 1 to 7 wherein the phase shifter is an impure silicon resistor.
9. A phased array radar control method applied to the phased array radar of any one of claims 1 to 8, the method comprising:
the metal line controls an input electric power by which a temperature of the phase shifter is controlled to control a phase of the emission beam.
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| CN201610984091.6A CN106501776B (en) | 2016-11-07 | 2016-11-07 | Phased array radar and phased array radar control method |
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| CN201610984091.6A CN106501776B (en) | 2016-11-07 | 2016-11-07 | Phased array radar and phased array radar control method |
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| CN106501776B true CN106501776B (en) | 2020-08-28 |
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| CN111220964B (en) * | 2018-11-27 | 2022-04-15 | 北京万集科技股份有限公司 | Mixed material phased array laser radar transmitting chip, manufacturing method and laser radar |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000082906A (en) * | 1998-09-07 | 2000-03-21 | Mitsubishi Electric Corp | Antenna turning mechanism |
| JP2008178034A (en) * | 2007-01-22 | 2008-07-31 | Toshiba Corp | Phased array antenna device and beam forming method therefor |
| CN102385053A (en) * | 2010-09-01 | 2012-03-21 | 株式会社电装 | Radar apparatus provided with series-feed array-antennas each including a plurality of antenna elements |
| CN103166691A (en) * | 2013-02-05 | 2013-06-19 | 广东通宇通讯股份有限公司 | Intelligent antenna and motivational method thereof |
| CN103457015A (en) * | 2013-08-07 | 2013-12-18 | 中国电子科技集团公司第十研究所 | Integrated millimeter wave active phased-array antenna |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000082906A (en) * | 1998-09-07 | 2000-03-21 | Mitsubishi Electric Corp | Antenna turning mechanism |
| JP2008178034A (en) * | 2007-01-22 | 2008-07-31 | Toshiba Corp | Phased array antenna device and beam forming method therefor |
| CN102385053A (en) * | 2010-09-01 | 2012-03-21 | 株式会社电装 | Radar apparatus provided with series-feed array-antennas each including a plurality of antenna elements |
| CN103166691A (en) * | 2013-02-05 | 2013-06-19 | 广东通宇通讯股份有限公司 | Intelligent antenna and motivational method thereof |
| CN103457015A (en) * | 2013-08-07 | 2013-12-18 | 中国电子科技集团公司第十研究所 | Integrated millimeter wave active phased-array antenna |
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