CN118232936A - Very low frequency synchronous tuning communication system based on coupling inductance - Google Patents
Very low frequency synchronous tuning communication system based on coupling inductance Download PDFInfo
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- CN118232936A CN118232936A CN202410634557.4A CN202410634557A CN118232936A CN 118232936 A CN118232936 A CN 118232936A CN 202410634557 A CN202410634557 A CN 202410634557A CN 118232936 A CN118232936 A CN 118232936A
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- 230000008878 coupling Effects 0.000 title claims abstract description 69
- 238000010168 coupling process Methods 0.000 title claims abstract description 69
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 69
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 60
- 238000004891 communication Methods 0.000 title claims abstract description 27
- 238000005259 measurement Methods 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 238000002955 isolation Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
The invention relates to the technical field of low-frequency communication processing, in particular to a very low-frequency synchronous tuning communication system based on coupling inductance, which comprises an exciter, a power divider, a transmitter and a synchronous tuning loop, wherein the exciter is used for generating MSK (minimum shift keying) modulation signals; the power divider is used for dividing an MSK modulation signal generated by the exciter into two paths, wherein one path of signal enters the antenna feed system after being amplified, and the other path of signal is used as a control signal to be input into the synchronous tuning loop; the transmitter amplifies the MSK modulation signal power and transmits the amplified MSK signal to the antenna feed system; the synchronous tuning loop controls the coupling inductance secondary loop to be connected or disconnected according to the control signal, so that the voltage and the current of the antenna are in phase. The synchronous tuning system provided by the invention has the advantages that the switching speed of the coupling inductor and the switch state is high, the synchronous tuning system can adapt to high-power very low frequency signals, the coupling inductor has high isolation, and the safety of the system is further improved, so that the communication rate of the very low frequency communication system is effectively improved.
Description
Technical Field
The invention relates to the technical field of low-frequency communication processing, in particular to a very low-frequency synchronous tuning communication system based on coupling inductance.
Background
The very low frequency communication antenna belongs to a high Q electric small antenna, the working bandwidth is limited, the communication rate is low, and the synchronous tuning system can expand the bandwidth of an antenna feed system and improve the communication rate by dynamically adjusting an antenna matching network.
However, the following difficulties exist with current very low frequency synchronous tuning communication systems: the tuning inductor and the switch are required to withstand high voltage and high current; the tuning inductor and the switch need to have fast state switching; the tuning inductor needs to have a high Q value, and the switch needs to have low loss; the synchronization control delay is required to be much smaller than the symbol duration; the system needs to have protective isolation measures to ensure the safety during high-power operation.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a very low frequency synchronous tuning communication system based on coupling inductance, which specifically comprises the following steps: the device comprises an exciter, a power divider, a transmitter and a synchronous tuning loop, wherein the exciter is used for generating an MSK modulation signal; the power divider is used for dividing an MSK modulation signal generated by the exciter into two paths, wherein one path of signal enters the antenna feed system after being amplified, and the other path of signal is used as a control signal to be input into the synchronous tuning loop; the transmitter is used for amplifying MSK modulation signal power and transmitting the amplified MSK signal to the antenna feed system, and the synchronous tuning loop is used for controlling the connection or disconnection of the secondary loop of the coupling inductor according to the code element switching frequency of the control signal, so that the antenna voltage and the antenna current are in phase. The synchronous tuning system provided by the invention has the advantages that the switching speed of the coupling inductor and the switch state is high, the synchronous tuning system can withstand high voltage and high current, is suitable for high-power very low frequency signals, and has high coupling inductor isolation, so that the safety of the system is further improved, and the communication rate of the very low frequency communication system is effectively improved.
The invention adopts the following technical scheme that the very low frequency synchronous tuning communication system based on the coupling inductance comprises an exciter, a power divider, a transmitter and a synchronous tuning loop, wherein:
The exciter is used for generating an MSK modulation signal;
The power divider is used for dividing an MSK modulation signal generated by the exciter into two paths, wherein one path of signal enters the antenna feed system after being amplified, and the other path of signal outputs a code element signal after being demodulated and is used as a control signal to be input into the synchronous tuning loop;
The transmitter is used for amplifying the MSK modulation signal power and transmitting the amplified MSK signal to the antenna feed system;
The synchronous tuning loop takes the demodulated code element signal as a control signal, and changes the resonance frequency of the antenna feed system by controlling the connection or disconnection of the secondary loop of the coupling inductor, so that the frequencies corresponding to the null marks and the mark marks in the MSK signal resonate in real time.
Further, the synchronous tuning loop includes: fixed inductance, coupled inductance, synchronous control, switch drive, current measurement, and voltage measurement;
The fixed inductor is used for tuning the very low frequency synchronous tuning communication system to the null frequency or mark frequency of the MSK modulation signal;
The synchronous control is used for sending a switching instruction to the switch drive according to the code element switching frequency of the control signal;
the switch drive is used for controlling the connection or disconnection of the secondary loop of the coupling inductor according to the switching instruction;
the current and voltage measurements are used to measure the current and voltage of the antenna.
Further, according to the symbol switching frequency of the control signal, a switching instruction is sent to the switch driver, specifically:
Judging whether the code element frequency of the current control signal is switched or not, and if so, controlling the secondary loop of the coupling inductor to be communicated by the switch in a driving way when the current in the secondary loop of the coupling inductor passes through a zero point;
Acquiring the current and voltage phase difference of the antenna at the moment, and if the current and the voltage of the antenna are in phase, completing switching;
If the current in the coupling inductance secondary loop is different in phase, the switch drive controls the coupling inductance secondary loop to be disconnected when the current in the coupling inductance secondary loop passes through a zero point; and the steps are repeated in sequence until the current and the voltage of the antenna are in phase.
Further, the coupling inductance specifically satisfies the following conditions:
The coupling coefficient of the coupling inductor is 1;
the primary-secondary winding transformation ratio of the coupling inductor is 1;
the same name ends of the coupling inductors are different.
The beneficial effects of the invention are as follows: the synchronous tuning system provided by the invention can improve the communication rate of the very low frequency communication system; coaxial coupling inductance can be adopted in the synchronous tuning loop to effectively reduce magnetic saturation phenomenon, hysteresis loss and the like; meanwhile, the invention has the advantage of strong expansibility, the coupling inductor can be composed of a single coupling inductor or a coupling inductor matrix and the like, and is suitable for broadband synchronous tuning; the switch can be composed of IGBT or MOSFET, and is suitable for quick switching, so that the coupling inductor and the switch can withstand high voltage and high current, and are suitable for high-power very low frequency signals; meanwhile, the isolation degree of the coupling inductor is high, and the safety of the system can be further improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a very low frequency synchronous tuning communication system based on coupling inductance according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a synchronous tuning control flow according to an embodiment of the present invention;
Fig. 3 is a schematic waveform diagram of switching an MSK signal at a peak of a carrier amplitude according to an embodiment of the present invention;
fig. 4 is a schematic waveform diagram of switching an MSK signal when the carrier amplitude is 0 according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a coupling inductance model according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of a controlled source model of coupling inductance according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a very low frequency synchronous tuning communication system based on coupling inductance, the structure of which is shown in fig. 1, wherein the system mainly comprises a terminal, an exciter, a power divider, a transmitter, a fixed inductance, coupling inductance, an antenna, synchronous control, switch driving, current measurement, voltage measurement and antenna monitoring, wherein:
The exciter is used for generating an MSK modulation signal;
the power divider is used for dividing an MSK modulation signal generated by the exciter into two paths, wherein one path of signal enters the antenna feed system after being amplified, and the other path of signal is used as a control signal to be input into the synchronous tuning loop;
The transmitter is used for amplifying the MSK modulation signal power and transmitting the amplified MSK signal to the antenna feed system;
The synchronous tuning loop takes the demodulated code element signal as a control signal to control the connection or disconnection of the secondary loop of the coupling inductor, so as to change the resonance frequency of the antenna feed system, enable the frequencies corresponding to the space numbers and the mark numbers in the MSK signal to resonate in real time, and enable the antenna voltage and the current to be in phase at the moment; wherein, the code element signal is a signal which is demodulated and output by MSK signal.
The synchronous tuning loop includes: fixed inductance, coupled inductance, synchronous control, switch driving, current measurement, voltage measurement, antenna monitoring;
The fixed inductor is used for tuning the very low frequency synchronous tuning communication system to the null frequency or mark frequency of the MSK modulation signal;
The synchronous control is used for sending a switching instruction to the switch drive according to the code element switching frequency of the control signal;
the switch drive is used for controlling the connection or disconnection of the secondary loop of the coupling inductor according to the switching instruction;
current and voltage measurements are used to measure the current and voltage of the antenna.
The secondary loop of the coupling inductor is controlled to be connected or disconnected according to the code element switching frequency of the control signal, and the method specifically comprises the following steps:
Judging whether the code element frequency of the current control signal is switched or not, and if so, controlling the secondary loop of the coupling inductor to be communicated by the switch in a driving way when the current in the secondary loop of the coupling inductor passes through a zero point;
Acquiring the current and voltage phase difference of the antenna at the moment, and if the current and the voltage of the antenna are in phase, completing switching;
If the current in the coupling inductance secondary loop is different in phase, the switch drive controls the coupling inductance secondary loop to be disconnected when the current in the coupling inductance secondary loop passes through a zero point; and the steps are repeated in sequence until the current and the voltage of the antenna are in phase.
The coupling inductance specifically satisfies the following conditions:
the coupling coefficient of the coupling inductance is about 1;
The transformation ratio of the main winding to the auxiliary winding of the coupling inductor is 1;
the same name ends of the coupling inductors are different.
In the specific embodiment of the present invention, the MSK signal is a signal with envelope constant phase and continuous, and there are two cases of "mark" and "space" switching points, one is switching when the carrier amplitude is the peak value, as shown in fig. 3; the other is to switch when the carrier amplitude is 0, as shown in fig. 4.
MSK modulation signals generated by the exciter are divided into two parts by the power divider, one part of the MSK modulation signals is amplified by the power amplifier and then enters the antenna feed system, the second part of the MSK modulation signals is used as control signals to enter synchronous control in the synchronous tuning loop, and meanwhile antenna monitoring signals also enter synchronous control;
As shown in fig. 5 and fig. 6, a schematic diagram of a coupling inductance and a controlled source model thereof according to an embodiment of the present invention are shown, where the coupling inductance needs to satisfy the following conditions:
In fig. 5, L 1=L2 ≡m, i.e. the coupling coefficient k≡1 (full coupling); the transformation ratio of the main winding to the auxiliary winding is 1; the same name ends are different;
From the above conditions, the following formula can be obtained in fig. 6:
；
；
To sum up, when the secondary loop is turned on, u 1 (t) =0, and the primary inductance is equivalent to 0.
In another embodiment of the present invention, the synchronous tuning system of the present invention is not limited to implementing synchronous tuning using a single synchronous control device, a single coupled inductor, and a single fixed inductor, but can be further extended to synchronous control matrices, coupled inductor matrices, and fixed inductor matrices.
The synchronous tuning circuit in the invention realizes the concrete process of synchronous tuning: first, the fixed inductance tunes the system to the "null" or "mark" frequency of the MSK; secondly, when the code element is switched, the on or off of a secondary loop of the coupling inductor is controlled by a switch, so that the primary loop of the coupling inductor is cut out and cut in; finally, whether the switching of the switch is successful or not is confirmed by measuring the phase difference of the voltage and the current of the antenna.
Specifically, as shown in fig. 2, a schematic diagram of a synchronous tuning control flow in an embodiment of the present invention is provided, in a synchronous tuning loop, first, whether the symbol frequency of a control signal is switched is judged, if not, switching is waited, if switching occurs, a next zero crossing point of current is waited, when the current is waited to flow through zero, a switching instruction is sent to a switch driver, then whether the voltage and the current of an antenna are in phase is judged, if in phase, switching is proved to be successful, the next round of waiting is entered, otherwise, the next zero crossing point of current is waited again, and when the current is waited to flow through zero, the switching instruction is sent again until the voltage of the antenna is in phase with the current.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. A very low frequency synchronous tuning communication system based on coupling inductance, comprising an exciter, a power divider, a transmitter and a synchronous tuning loop, comprising:
The exciter is used for generating an MSK modulation signal;
The power divider is used for dividing an MSK modulation signal generated by the exciter into two paths, wherein one path of signal enters the antenna feed system after being amplified, and the other path of signal outputs a code element signal after being demodulated and is used as a control signal to be input into the synchronous tuning loop;
The transmitter is used for amplifying the MSK modulation signal power and transmitting the amplified MSK signal to the antenna feed system;
The synchronous tuning loop takes the demodulated code element signal as a control signal, and changes the resonance frequency of the antenna feed system by controlling the connection or disconnection of the secondary loop of the coupling inductor, so that the frequencies corresponding to the null marks and the mark marks in the MSK signal resonate in real time.
2. A coupling inductance based very low frequency synchronous tuning communication system according to claim 1, wherein: the synchronous tuning loop comprises: fixed inductance, coupled inductance, synchronous control, switch driving, current measurement, voltage measurement, and antenna monitoring;
The fixed inductor is used for tuning the very low frequency synchronous tuning communication system to the null frequency or mark frequency of the MSK modulation signal;
The synchronous control is used for sending a switching instruction to the switch drive according to the code element switching frequency of the control signal;
the switch drive is used for controlling the connection or disconnection of the secondary loop of the coupling inductor according to the switching instruction;
the current and voltage measurements are used to measure the current and voltage of the antenna.
3. A coupling inductance based very low frequency synchronous tuning communication system according to claim 1, wherein: transmitting a switching instruction to the switch driver according to the code element switching frequency of the control signal, specifically:
Judging whether the code element frequency of the current control signal is switched or not, and if so, controlling the secondary loop of the coupling inductor to be communicated by the switch in a driving way when the current in the secondary loop of the coupling inductor passes through a zero point;
Acquiring the current and voltage phase difference of the antenna at the moment, and if the current and the voltage of the antenna are in phase, completing switching;
If the current in the coupling inductance secondary loop is different in phase, the switch drive controls the coupling inductance secondary loop to be disconnected when the current in the coupling inductance secondary loop passes through a zero point; and the steps are repeated in sequence until the current and the voltage of the antenna are in phase.
4. A coupling inductance based very low frequency synchronous tuning communication system according to claim 2, wherein:
The coupling coefficient of the coupling inductor is 1;
the primary-secondary winding transformation ratio of the coupling inductor is 1;
the same name ends of the coupling inductors are different.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103908A (en) * | 1987-05-30 | 1988-12-21 | 迈格普尔斯公司 | The system and method for dynamic antenna tuning |
| US20030119469A1 (en) * | 2001-10-26 | 2003-06-26 | Microsoft Corporation | System and method for automatically tuning an antenna |
| WO2009115996A1 (en) * | 2008-03-21 | 2009-09-24 | Nxp B.V. | Apparatus comprising a broadcast receiver circuit and an antenna and a tuning circuit |
| CN105007249A (en) * | 2015-06-04 | 2015-10-28 | 重庆大学 | 2FSK-based wireless energy and signal synchronous transmission system and method |
| US20160226400A1 (en) * | 2013-09-12 | 2016-08-04 | Auckland Uniservices Limited | Resonant power supply with self tuning |
| CN207339907U (en) * | 2017-11-07 | 2018-05-08 | 武汉华讯国蓉科技有限公司 | A kind of very low frequency fanaticism number demodulates verification system |
| CN112753151A (en) * | 2018-09-26 | 2021-05-04 | 艾格电子工程责任有限公司 | System for transmitting electric power to an electric load |
| US20210190894A1 (en) * | 2019-12-23 | 2021-06-24 | Rockwell Collins, Inc. | System and Method for Very Low Frequency and Low Frequency Transmitter Navigation |
| CN115549702A (en) * | 2021-06-29 | 2022-12-30 | 中电长城圣非凡信息系统有限公司 | Very low frequency transmitter and transmitting method |
-
2024
- 2024-05-22 CN CN202410634557.4A patent/CN118232936B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103908A (en) * | 1987-05-30 | 1988-12-21 | 迈格普尔斯公司 | The system and method for dynamic antenna tuning |
| US20030119469A1 (en) * | 2001-10-26 | 2003-06-26 | Microsoft Corporation | System and method for automatically tuning an antenna |
| WO2009115996A1 (en) * | 2008-03-21 | 2009-09-24 | Nxp B.V. | Apparatus comprising a broadcast receiver circuit and an antenna and a tuning circuit |
| US20160226400A1 (en) * | 2013-09-12 | 2016-08-04 | Auckland Uniservices Limited | Resonant power supply with self tuning |
| CN105007249A (en) * | 2015-06-04 | 2015-10-28 | 重庆大学 | 2FSK-based wireless energy and signal synchronous transmission system and method |
| CN207339907U (en) * | 2017-11-07 | 2018-05-08 | 武汉华讯国蓉科技有限公司 | A kind of very low frequency fanaticism number demodulates verification system |
| CN112753151A (en) * | 2018-09-26 | 2021-05-04 | 艾格电子工程责任有限公司 | System for transmitting electric power to an electric load |
| US20210190894A1 (en) * | 2019-12-23 | 2021-06-24 | Rockwell Collins, Inc. | System and Method for Very Low Frequency and Low Frequency Transmitter Navigation |
| CN115549702A (en) * | 2021-06-29 | 2022-12-30 | 中电长城圣非凡信息系统有限公司 | Very low frequency transmitter and transmitting method |
Non-Patent Citations (3)
| Title |
|---|
| ELENA N. BAIKOVA; ALEXANDRE V. BAIKOV; LUÍS ROMBA; STANIMIR VALTCHEV; RUI MELICIO: "Resonance Tuning in Wireless Energy Transfer System", 《2022 4TH GLOBAL POWER, ENERGY AND COMMUNICATION CONFERENCE (GPECOM)》, 11 July 2022 (2022-07-11) * |
| 周亮;柳超;董颖辉;谢旭;: "甚低频十三塔天线电气性能的研究", 通信技术, no. 09, 10 September 2013 (2013-09-10) * |
| 陈少昌;严亚龙;凌佳俊;: "甚低频发射天线动态调谐控制技术研究", 信息工程大学学报, no. 04, 15 August 2015 (2015-08-15) * |
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