An active integrated electrically polarized transceiver flat antenna

Abstract

The present invention relates to an active integrated electrically polarized transceiver flat panel antenna, belonging to the field of satellite communication technology. It comprises a dual-polarized antenna panel, a transmitting intermediate frequency amplifier amplifies an L-band signal, and then sends it to the common port of a transmitting intermediate frequency power divider for equal amplitude and in-phase power division, one port of the transmitting intermediate frequency power divider is connected to the transmitting port of a No. 1 duplexer through a transmitting horizontal polarization link, and the common port of the No. 1 duplexer is connected to the horizontal polarization port of the dual-polarized antenna panel to achieve the feeding of horizontal polarized waves; the second port of the transmitting intermediate frequency power divider is connected to the transmitting port of the No. 2 duplexer through a transmitting vertical polarization link, and the common port of the No. 2 duplexer is connected to the vertical polarization port of the dual-polarized antenna panel to achieve the feeding of vertical polarized waves. The present invention can adjust the amplitude-phase ratio of horizontally polarized and vertically polarized waves through a voltage-controlled reflective phase shifter and a digitally controlled attenuator to achieve arbitrary polarization state adjustment.

Description

Technical Field

[0001] The invention relates to an active integrated electrically polarized transceiver flat antenna, belonging to the technical field of satellite communications. Background Art

[0002] Modern satellite communications have a wide coverage area, long communication distance, wide frequency bandwidth, flexible services, stable and reliable performance, convenient deployment, and are not restricted by geographical environment. They are an important part of modern wireless communications and 6G integrated space-ground communication systems, and are widely used in broadband wireless communications, television broadcasting, emergency communications, etc. However, due to changes in the posture of ground carriers and the influence of environmental rain, multipath propagation, etc., the polarization state of electromagnetic waves changes, resulting in polarization mismatch of communication equipment, reduced signal power, and poor communication quality. Traditional mechanical adjustment of antenna polarization technology is inefficient and has poor accuracy. Therefore, realizing high-precision active integrated electrically adjustable polarization transceiver antennas is a technical difficulty that needs to be solved and improved in modern satellite communication systems. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems existing in the prior art and provide an active integrated electrically adjustable polarization transceiver flat-panel antenna, which can adjust the amplitude-phase ratio of horizontally polarized and vertically polarized waves through a voltage-controlled reflective phase shifter and a digitally controlled attenuator to achieve arbitrary polarization state adjustment.

[0004] In order to solve the above technical problems, an active integrated electrically adjustable polarization transceiver flat panel antenna of the present invention comprises a dual-polarization antenna panel, a dual-polarization antenna panel, and a transmitting intermediate frequency amplifier. The transmitting intermediate frequency amplifier amplifies the L-band signal and then sends it to the common port of the transmitting intermediate frequency power divider for equal-amplitude and in-phase power division.

[0005] One port of the transmitting intermediate frequency power divider is connected to the transmitting port of the first duplexer through a transmitting horizontal polarization link, and the common port of the first duplexer is connected to the horizontal polarization port of the dual-polarization antenna panel to realize the feeding of horizontal polarization waves;

[0006] The two ports of the transmitting intermediate frequency power divider are connected to the transmitting port of the second duplexer through a transmitting vertical polarization link, and the common port of the second duplexer is connected to the vertical polarization port of the dual-polarization antenna panel to realize the feeding of vertical polarization waves.

[0007] Further, the transmitting horizontal polarization link includes a transmitting digitally controlled attenuator No. 1, a transmitting mixer No. 1, a transmitting radio frequency bandpass filter No. 1 and a transmitting power amplifier No. 1 connected in sequence, so as to achieve gain adjustment of the horizontal polarization signal, and filter and amplify the horizontal polarization intermediate frequency signal after up-conversion, and then enter the transmitting port of the No. 1 duplexer;

[0008] The transmitting vertical polarization link includes a transmitting No. 2 digitally controlled attenuator, a transmitting No. 2 mixer, a transmitting No. 2 radio frequency bandpass filter and a transmitting No. 2 power amplifier which are connected in sequence, so as to achieve gain adjustment of the vertical polarization signal, and filter and amplify the vertical polarization intermediate frequency signal after up-conversion, and then enter the transmitting port of the No. 2 duplexer.

[0009] Further, the external 10MHz reference signal is connected to the input end of the transmit frequency synthesizer, the output end of the transmit frequency synthesizer is connected to the input end of the transmit local oscillator filter, and the output end of the transmit local oscillator filter is connected to the common port of the transmit local oscillator power divider;

[0010] One port of the transmitting local oscillator power divider is connected to the input end of the transmitting No. 1 voltage-controlled reflective phase shifter, and the output end of the transmitting No. 1 voltage-controlled reflective phase shifter is connected to the local oscillator input end of the transmitting No. 1 mixer;

[0011] The two ports of the transmitting local oscillator power divider are connected to the input end of the transmitting No. 2 voltage-controlled reflective phase shifter, and the output end of the transmitting No. 2 voltage-controlled reflective phase shifter is connected to the local oscillator input end of the transmitting No. 2 mixer.

[0012] Further, the receiving port of the first duplexer is connected to one port of the receiving intermediate frequency combiner through a receiving horizontal polarization link, the receiving port of the second duplexer is connected to two ports of the receiving intermediate frequency combiner through a receiving vertical polarization link, the common port of the receiving intermediate frequency combiner is connected to the input end of the receiving intermediate frequency amplifier, and the output end of the receiving intermediate frequency amplifier is used as a receiving L-band signal output;

[0013] The receiving horizontal polarization link comprises a receiving No. 1 low noise amplifier, a receiving No. 1 radio frequency bandpass filter, a receiving No. 1 down converter and a receiving No. 1 digitally controlled attenuator which are connected in sequence, the receiving port of the No. 1 duplexer is connected to the input end of the receiving No. 1 low noise amplifier, and the output end of the receiving No. 1 digitally controlled attenuator is connected to a port of the receiving intermediate frequency combiner;

[0014] The receiving vertical polarization link includes a receiving No. 2 low noise amplifier, a receiving No. 2 radio frequency bandpass filter, a receiving No. 2 down converter and a receiving No. 2 digitally controlled attenuator which are connected in sequence. The receiving port of the No. 2 duplexer is connected to the input end of the receiving No. 2 low noise amplifier, and the output end of the receiving No. 2 digitally controlled attenuator is connected to two ports of the receiving intermediate frequency combiner.

[0015] Furthermore, the output end of the receiving reference crystal oscillator is connected to the common port of the receiving reference power divider.

[0016] A port of the receiving reference power divider is connected to the input end of the receiving No. 1 voltage-controlled reflective phase shifter, the output end of the receiving No. 1 voltage-controlled reflective phase shifter is connected to the reference input port of the receiving No. 1 frequency synthesizer, and the output end of the receiving No. 1 frequency synthesizer is connected to the local oscillator input end of the receiving No. 1 down-converter;

[0017] The two ports of the receiving reference power divider are connected to the input end of the receiving No. 2 voltage-controlled reflective phase shifter, the output end of the receiving No. 2 voltage-controlled reflective phase shifter is connected to the reference input port of the receiving No. 2 frequency synthesizer, and the output end of the receiving No. 2 frequency synthesizer is connected to the local oscillator input end of the receiving No. 2 down-converter.

[0018] Furthermore, the receiving frequency synthesizer No. 1 and the receiving frequency synthesizer No. 2 both use fractional-frequency phase-locked loops with integrated voltage-controlled oscillators, and their output frequency range is 9.75 GHz to 10.6 GHz.

[0019] The center frequency of the receiving No. 1 voltage-controlled reflective phase shifter and the receiving No. 2 voltage-controlled reflective phase shifter is 25 MHz, the control voltage is 0-5 V, and the phase shift range after frequency multiplication by the frequency synthesizer is 0-360 degrees.

[0020] Furthermore, the control unit of the transceiver channel is composed of a microcontroller, a first dual-channel digital-to-analog converter and a second dual-channel digital-to-analog converter.

[0021] Each amplitude signal output terminal of the microcontroller is respectively connected to the control terminal of the transmitting digital controlled attenuator No. 1, the transmitting digital controlled attenuator No. 2, the receiving digital controlled attenuator No. 1 and the receiving digital controlled attenuator No. 2;

[0022] The transmitting phase signal output terminal of the microcontroller is connected to the digital signal input terminal of the No. 1 dual-channel digital-to-analog converter, the control voltage output terminal 1 of the No. 1 dual-channel digital-to-analog converter is connected to the control terminal of the No. 1 transmitting voltage-controlled reflective phase shifter, and the control voltage output terminal 2 of the No. 1 dual-channel digital-to-analog converter is connected to the control terminal of the No. 2 transmitting voltage-controlled reflective phase shifter;

[0023] The receiving phase signal output terminal of the microcontroller is connected to the digital signal input terminal of the second dual-channel digital-to-analog converter, the control voltage output terminal 1 of the second dual-channel digital-to-analog converter is connected to the control terminal of the receiving voltage-controlled reflective phase shifter No. 1, and the control voltage output terminal 2 of the second dual-channel digital-to-analog converter is connected to the control terminal of the receiving voltage-controlled reflective phase shifter No. 2.

[0024] The beneficial effects of the present invention are: 1. The polarization adjustment accuracy of the present invention is high. The electrical polarization adjustment is achieved by using a digitally controlled attenuator and a voltage-controlled reflective phase shifter to adjust the amplitude-phase ratio of the horizontal and vertical polarized waves in the transceiver channel respectively. The adjustment range is 0-180 degrees and the adjustment accuracy is 1 degree.

[0025] 2. The present invention has a simple structure. The horizontal and vertical polarization amplitudes are adjusted by an intermediate frequency digitally controlled attenuator, and the phase is adjusted by a voltage-controlled reflective phase shifter. The transmitting channel adjusts the phase of the transmitting signal by performing phase shifting on the local oscillator signal, and the receiving channel adjusts the phase of the receiving signal by performing phase shifting on the reference signal. The phase shifting is low in cost and has a large adjustment range.

[0026] 3. The polarization control method of the present invention is simple. First, the amplitude and phase of the horizontal and vertical polarization links of the transmission and reception are aligned through automatic calibration. Then, the amplitude control word and phase control word of the horizontal and vertical polarization waves are obtained by looking up the table according to the required polarization angle, so as to control the amplitude phase ratio of the horizontal polarization and vertical polarization waves of the transmission and reception channels respectively.

[0027] 4. The local oscillator frequencies of the transmitting mixer No. 1 and mixer No. 2 are both 12.8 GHz, which are generated by the transmitting frequency synthesizer; the external 10 MHz reference signal is input into the transmitting frequency synthesizer, and the output of the transmitting frequency synthesizer is filtered out by the transmitting local oscillator filter to remove harmonic spurs, and then the transmitting local oscillator power divider performs equal-amplitude and in-phase power division, and the two local oscillator signals output by the transmitting local oscillator power divider are phase-shifted by the transmitting voltage-controlled reflective phase shifter No. 1 and the transmitting voltage-controlled reflective phase shifter No. 2 respectively, and then sent to the local oscillator input ends of the transmitting mixer No. 1 and the transmitting mixer No. 2.

[0028] 5. Any linearly polarized wave can be decomposed into two orthogonal linearly polarized waves such as the vector sum of horizontal polarization and vertical polarization in the Cartesian coordinate system. Therefore, by adjusting the transmitting No. 1 digitally controlled attenuator of the horizontal polarization link and the transmitting No. 1 voltage-controlled reflective phase shifter of the local oscillator link, as well as the transmitting No. 2 digitally controlled attenuator of the vertical polarization link and the transmitting No. 2 voltage-controlled reflective phase shifter of the local oscillator link, the amplitude and phase adjustment of the transmitting horizontal polarization and vertical polarization can be achieved, thereby achieving arbitrary adjustment of the polarization angle of the transmitted composite signal within the range of 0 to 180 degrees.

[0029] 6. After being received from the dual-polarization antenna panel, the received signal is divided into two paths, horizontal polarization and vertical polarization. The received horizontal polarization signal is sent to the receiving No. 1 low-noise amplifier of the receiving horizontal polarization link through the No. 1 duplexer. The receiving horizontal polarization link is used to perform low-noise amplification, filtering, and down-converting the received Ku-band horizontal polarization small signal to the L-band for gain adjustment, and then send it to one port of the receiving intermediate frequency power divider; the received horizontal polarization signal is sent to the receiving No. 2 low-noise amplifier of the receiving vertical polarization link through the No. 2 duplexer. The receiving vertical polarization link is used to perform low-noise amplification, filtering, and down-converting the received Ku-band vertical polarization small signal to the L-band for gain adjustment, and then send it to the second port of the receiving intermediate frequency power divider; the receiving intermediate frequency power divider performs equal-amplitude and in-phase power synthesis on the horizontal polarization and vertical signals, and sends them to the receiving intermediate frequency amplifier for amplification and output.

[0030] 7. The local oscillator signals of the receiving down converter No. 1 and No. 2 are generated by the receiving frequency synthesizer No. 1 and No. 2 respectively. The reference signals of the receiving frequency synthesizer No. 1 and No. 2 are generated by the receiving reference crystal oscillator, and the reference signal frequency is 25MHz. The 25MHz reference signal is divided into equal amplitude and phase by the receiving reference power divider. The two reference signals after power division are phase-shifted by the receiving voltage-controlled reflective phase shifter No. 1 and sent to the receiving frequency synthesizer No. 1, and phase-shifted by the receiving voltage-controlled reflective phase shifter No. 2 and sent to the reference input port of the receiving frequency synthesizer No. 2.

[0031] 8. By adjusting the receiving digital controlled attenuator No. 1 of the horizontal polarization link and the receiving voltage controlled reflective phase shifter No. 1 of the reference link, as well as the receiving digital controlled attenuator No. 2 of the vertical polarization link and the receiving voltage controlled reflective phase shifter No. 2 of the reference link, the amplitude and phase adjustment of the received horizontal polarization and vertical polarization can be achieved, thereby achieving arbitrary adjustment of the polarization angle of the received composite signal within the range of 0 to 180 degrees.

[0032] 9. First, the amplitude and phase of the horizontal and vertical polarization links of the transceiver channel are aligned through automatic calibration. Then, the amplitude control word and phase control word of the horizontal and vertical polarization waves are obtained by looking up the table according to the required polarization angle, and the amplitude and phase of the horizontal polarization and vertical polarization waves of the transceiver channel are adjusted respectively. The microcontroller is connected to each digitally controlled attenuator to adjust the amplitude of the transceiver link. The microcontroller controls the No. 1 dual-channel digital-to-analog converter to output two control voltages to the No. 1 voltage-controlled reflective phase shifter for transmission and the No. 2 voltage-controlled reflective phase shifter for transmission to complete the phase adjustment of the transmission link. The microcontroller controls the No. 2 dual-channel digital-to-analog converter to output two control voltages to the No. 1 voltage-controlled reflective phase shifter for reception and the No. 2 voltage-controlled reflective phase shifter for reception to complete the phase adjustment of the reception link. Finally, the transceiver polarization adjustment range is 0~180 degrees, the accuracy is 1 degree, and the cross-polarization is better than 25dB. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The schematic diagram of the active integrated electrically polarized transceiver flat antenna of the present invention.

[0034] In the figure: 1. Transmit intermediate frequency amplifier; 2. Transmit intermediate frequency power divider; 3. Transmit digital controlled attenuator No. 1; 4. Transmit mixer No. 1; 5. Transmit RF bandpass filter No. 1; 6. Transmit power amplifier No. 1; 7. Transmit voltage-controlled reflective phase shifter No. 1; 8. Transmit local oscillator power divider; 9. Transmit local oscillator filter; 10. Transmit frequency synthesizer; 11. Transmit voltage-controlled reflective phase shifter No. 2; 12. Transmit digital controlled attenuator No. 2; 13. Transmit mixer No. 2; 14. Transmit RF bandpass filter No. 2; 15. Transmit power amplifier No. 2; 16. No. 1 duplexer; 17. Dual-polarization antenna panel; 18. Receive No. 1 digitally controlled attenuator; 19. Receive No. 1 downconverter; 20. Receive No. 1 RF bandpass filter; 21. Receive No. 1 low-noise amplifier; 22. Receive No. 1 frequency synthesizer; 23. Receive No. 1 voltage-controlled reflective phase shifter; 24. Receive reference power divider; 25. No. 2 duplexer; 26. Receive No. 2 voltage-controlled reflective phase shifter; 27. Receive reference crystal oscillator; 28 Receive intermediate frequency amplifier; 29. ​​Receive intermediate frequency combiner; 30. Receive No. 2 frequency synthesizer; 31. Receive No. 2 digitally controlled attenuator; 32. Receive No. 2 downconverter; 33. Receive No. 2 RF bandpass filter; 34. Receive No. 2 low-noise amplifier; 35. Microcontroller; 36. No. 1 dual-channel digital-to-analog converter; 37. No. 2 dual-channel digital-to-analog converter. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] like Figure 1 As shown, the active integrated electrically polarized transceiver flat panel antenna of the present invention comprises a dual-polarized antenna panel 17, the transmitting L-band signal is connected to the input end of the transmitting intermediate frequency amplifier 1, and the output port of the transmitting intermediate frequency amplifier 1 is connected to the common port of the transmitting intermediate frequency power divider 2.

[0037] One port of the transmitting intermediate frequency power divider 2 is connected to the transmitting port of the first duplexer 16 through a transmitting horizontal polarization link, and the common port of the first duplexer 16 is connected to the horizontal polarization port of the dual-polarization antenna panel 17;

[0038] The two ports of the transmitting intermediate frequency power divider 2 are connected to the transmitting port of the second duplexer 25 through a transmitting vertical polarization link, and the common port of the second duplexer 25 is connected to the vertical polarization port of the dual-polarization antenna panel 17 .

[0039] The transmitting horizontal polarization link includes a transmitting digital controlled attenuator No. 1 3, a transmitting mixer No. 1 4, a transmitting radio frequency bandpass filter No. 1 5 and a transmitting power amplifier No. 1 6 which are connected in sequence, a port of the transmitting intermediate frequency power divider 2 is connected to the input end of the transmitting digital controlled attenuator No. 1 3, and the output end of the transmitting power amplifier No. 1 6 is connected to the transmitting port of the No. 1 duplexer 16;

[0040] The transmitting vertical polarization link includes a transmitting No. 2 digitally controlled attenuator 12, a transmitting No. 2 mixer 13, a transmitting No. 2 RF bandpass filter 14 and a transmitting No. 2 power amplifier 15 which are connected in sequence. The two ports of the transmitting intermediate frequency power divider 2 are connected to the input end of the transmitting No. 2 digitally controlled attenuator 12, and the output end of the transmitting No. 2 power amplifier 15 is connected to the transmitting port of the No. 2 duplexer 25.

[0041] The transmitting intermediate frequency amplifier 1 amplifies the L-band signal with an input power of -20dBm and a frequency of 0.95~1.7GHz, and then sends it to the transmitting intermediate frequency power divider 2 for equal amplitude and in-phase power division;

[0042] The transmitting horizontal polarization link realizes the gain adjustment of the horizontal polarization signal, and up-converts the horizontal polarization intermediate frequency signal to 13.75~14.5GHz, filters and amplifies it, and then enters the transmitting port of the No. 1 duplexer 16, and is transmitted from the common port of the No. 1 duplexer 16 to the horizontal polarization port of the dual-polarization antenna panel 17, realizing the feeding of the horizontal polarization wave, and radiated outward by the antenna.

[0043] The transmitting vertical polarization link realizes the gain adjustment of the vertical polarization signal, and up-converts the vertical polarization intermediate frequency signal to 13.75~14.5GHz, filters and amplifies it, and then enters the transmitting port of the second duplexer 25, and is transmitted from the common port of the second duplexer 25 to the vertical polarization port of the dual-polarization antenna panel 17, so as to realize the feeding of the vertical polarization wave, which is radiated outward by the antenna.

[0044] The operating frequency band of the transmitting intermediate frequency amplifier 1 is 50MHz~4GHz, and the gain is 20dB;

[0045] The operating frequency of the transmitting intermediate frequency power divider 2 is 500MHz~2500MHz, the amplitude imbalance is 0.02dB, and the phase imbalance is 0.9 degrees;

[0046] Both the transmitting No. 1 digital controlled attenuator 3 and the transmitting No. 2 digital controlled attenuator 12 adopt 6-bit digital controlled attenuators, with an attenuation range of 0~31.5dB, a step of 0.5dB, and an operating frequency band of 1MHz~4GHz;

[0047] Both the transmitting mixer No. 1 4 and the transmitting mixer No. 2 13 adopt passive double-balanced mixers with a conversion loss of 8 dB and an operating frequency band of 8 to 16 GHz;

[0048] Both the transmitting No. 1 RF bandpass filter 5 and the transmitting No. 2 RF bandpass filter 14 use 6-cavity substrate integrated waveguide filters with a center frequency of 14.13 GHz and a bandwidth of 1.25 GHz;

[0049] Both the transmitting power amplifier No. 1 6 and the transmitting power amplifier No. 2 15 use gallium arsenide amplifiers, with an operating frequency of 13.75 GHz to 14.5 GHz and an output 1 dB compression point of 35 dBm.

[0050] The external 10MHz reference signal is connected to the input end of the transmitting frequency synthesizer 10, the output end of the transmitting frequency synthesizer 10 is connected to the input end of the transmitting local oscillator filter 9, and the output end of the transmitting local oscillator filter 9 is connected to the common port of the transmitting local oscillator power divider 8.

[0051] One port of the transmitting local oscillator power divider 8 is connected to the input end of the transmitting No. 1 voltage-controlled reflective phase shifter 7, and the output end of the transmitting No. 1 voltage-controlled reflective phase shifter 7 is connected to the local oscillator input end of the transmitting No. 1 mixer 4;

[0052] The two ports of the transmitting local oscillator power divider 8 are connected to the input end of the transmitting No. 2 voltage-controlled reflective phase shifter 11 , and the output end of the transmitting No. 2 voltage-controlled reflective phase shifter 11 is connected to the local oscillator input end of the transmitting No. 2 mixer 13 .

[0053] The local oscillator frequencies of the transmitting mixer No. 1 4 and the transmitting mixer No. 2 13 are both 12.8 GHz, which are generated by the transmitting frequency synthesizer 10; the external 10 MHz reference signal is input into the transmitting frequency synthesizer 10, and the output of the transmitting frequency synthesizer 10 is filtered out by the transmitting local oscillator filter 9 to remove harmonic spurs, and then the transmitting local oscillator power divider 8 performs equal-amplitude and in-phase power division, and the two local oscillator signals output by the transmitting local oscillator power divider 8 are phase-shifted by the transmitting voltage-controlled reflective phase shifter No. 1 7 and the transmitting voltage-controlled reflective phase shifter No. 2 11 respectively, and then sent to the local oscillator input ends of the transmitting mixer No. 1 4 and the transmitting mixer No. 2 13.

[0054] The transmitting frequency synthesizer 10 adopts a fractional-frequency phase-locked loop with an integrated voltage-controlled oscillator VCO, with an output frequency range of 12.8GHz~13.05GHz, and the phase-locked loop is locked to an external 10MHz reference signal; the operating frequency band of the transmitting No. 1 voltage-controlled reflective phase shifter 7 and the transmitting No. 2 voltage-controlled reflective phase shifter 11 is 12.7~13.2GHz, the control voltage is 0-5V, and the phase shift range is 0~180 degrees.

[0055] For any linear polarization wave, it can be decomposed into two orthogonal linear polarization waves such as the vector sum of horizontal polarization and vertical polarization in the Cartesian coordinate system. Therefore, by adjusting the transmitting digital controlled attenuator No. 1 3 of the horizontal polarization link and the transmitting voltage-controlled reflective phase shifter No. 1 7 of the local oscillator link as well as the transmitting digital controlled attenuator No. 2 12 of the vertical polarization link and the transmitting voltage-controlled reflective phase shifter No. 2 11 of the local oscillator link, the amplitude and phase adjustment of the transmitting horizontal polarization and vertical polarization can be achieved, thereby achieving arbitrary adjustment of the polarization angle of the transmitted composite signal within the range of 0 to 180 degrees.

[0056] The signal bandwidth is 1MHz and the carrier frequency is 14.05GHz.

[0057] The receiving port of the first duplexer 16 is connected to one port of the receiving intermediate frequency combiner 29 via a receiving horizontal polarization link, the receiving port of the second duplexer 25 is connected to two ports of the receiving intermediate frequency combiner 29 via a receiving vertical polarization link, the common port of the receiving intermediate frequency combiner 29 is connected to the input end of the receiving intermediate frequency amplifier 28, and the output end of the receiving intermediate frequency amplifier 28 is used as a receiving L-band signal output;

[0058] The receiving horizontal polarization link includes a receiving No. 1 low noise amplifier 21, a receiving No. 1 radio frequency bandpass filter 20, a receiving No. 1 down converter 19 and a receiving No. 1 digitally controlled attenuator 18 which are connected in sequence, a receiving port of a No. 1 duplexer 16 is connected to an input end of the receiving No. 1 low noise amplifier 21, and an output end of the receiving No. 1 digitally controlled attenuator 18 is connected to a port of a receiving intermediate frequency combiner 29;

[0059] The receiving vertical polarization link includes a receiving No. 2 low noise amplifier 34, a receiving No. 2 RF bandpass filter 33, a receiving No. 2 down converter 32 and a receiving No. 2 digitally controlled attenuator 31 which are connected in sequence. The receiving port of the No. 2 duplexer 25 is connected to the input end of the receiving No. 2 low noise amplifier 34, and the output end of the receiving No. 2 digitally controlled attenuator 31 is connected to two ports of the receiving intermediate frequency combiner 29.

[0060] The received signal is divided into two paths, horizontal polarization and vertical polarization, after being received from the dual-polarization antenna panel 17.

[0061] The received horizontal polarization signal is sent to the receiving No. 1 low noise amplifier 21 of the receiving horizontal polarization link through the No. 1 duplexer 16. The receiving horizontal polarization link is used to perform low noise amplification, filtering, and down-converting the received Ku-band horizontal polarization small signal to the L-band for gain adjustment, and then sent to a port of the receiving intermediate frequency combiner 29;

[0062] The received horizontal polarization signal is sent to the receiving second low noise amplifier 34 of the receiving vertical polarization link through the second duplexer 25. The receiving vertical polarization link is used to perform low noise amplification, filtering, and down-converting the received Ku-band vertical polarization small signal to the L-band for gain adjustment, and then sent to the second port of the receiving intermediate frequency combiner 29;

[0063] The receiving intermediate frequency combiner 29 combines the power of the horizontal polarization signal and the vertical polarization signal with equal amplitude and phase, and sends the combined power to the receiving intermediate frequency amplifier 28 for amplification and output.

[0064] The operating frequency band of the receiving No. 1 low noise amplifier 21 and the receiving No. 2 low noise amplifier 34 is 10.5~13GHz, and the noise figure is 0.35dB;

[0065] The receiving radio frequency bandpass filter No. 1 20 and the receiving radio frequency bandpass filter No. 2 33 use 6-cavity substrate integrated waveguide filters, the center frequency of the filter is 11.7 GHz, and the bandwidth is 2.5 GHz;

[0066] The operating frequency band of the receiving down converter No. 1 19 and the receiving down converter No. 2 32 is 10.7-12.75 GHz, and the frequency conversion gain is 36 dB;

[0067] The receiving intermediate frequency amplifier 28 has an operating frequency band of 50MHz~4GHz and a gain of 20dB;

[0068] The operating frequency of the receiving intermediate frequency combiner 29 is 500MHz~2500MHz, the amplitude imbalance is 0.02dB, and the phase imbalance is 0.9 degrees.

[0069] The output end of the receiving reference crystal oscillator 27 is connected to the common port of the receiving reference power divider 24.

[0070] One port of the receiving reference power divider 24 is connected to the input end of the receiving No. 1 voltage-controlled reflective phase shifter 23, the output end of the receiving No. 1 voltage-controlled reflective phase shifter 23 is connected to the reference input port of the receiving No. 1 frequency synthesizer 22, and the output end of the receiving No. 1 frequency synthesizer 22 is connected to the local oscillator input end of the receiving No. 1 down-converter 19;

[0071] The two ports of the receiving reference power divider 24 are connected to the input end of the receiving No. 2 voltage-controlled reflective phase shifter 26, the output end of the receiving No. 2 voltage-controlled reflective phase shifter 26 is connected to the reference input port of the receiving No. 2 frequency synthesizer 30, and the output end of the receiving No. 2 frequency synthesizer 30 is connected to the local oscillator input end of the receiving No. 2 down-converter 32.

[0072] The local oscillator signals of the receiving down converter No. 1 19 and the receiving down converter No. 2 32 are respectively generated by the receiving frequency synthesizer No. 1 22 and the receiving frequency synthesizer No. 2 30, and the reference signals of the receiving frequency synthesizer No. 1 22 and the receiving frequency synthesizer No. 2 30 are generated by the receiving reference crystal oscillator 27, and the reference signal frequency is 25MHz. The 25MHz reference signal is divided into equal amplitude and phase by the receiving reference power divider 24, and the two reference signals after the power division are respectively phase-shifted by the receiving voltage-controlled reflective phase shifter No. 1 23 and sent to the receiving frequency synthesizer No. 1 22, and phase-shifted by the receiving voltage-controlled reflective phase shifter No. 2 26 and sent to the reference input port of the receiving frequency synthesizer No. 2 30.

[0073] By adjusting the receiving digital controlled attenuator No. 1 18 of the horizontal polarization link and the receiving voltage-controlled reflective phase shifter No. 1 23 of the reference link, as well as the receiving digital controlled attenuator No. 31 of the vertical polarization link and the receiving voltage-controlled reflective phase shifter No. 2 26 of the reference link, the amplitude and phase adjustment of the received horizontal polarization and vertical polarization can be achieved, thereby achieving arbitrary adjustment of the polarization angle of the received composite signal within the range of 0 to 180 degrees.

[0074] The receiving frequency synthesizer No. 1 22 and the receiving frequency synthesizer No. 2 30 both use a fractional frequency phase-locked loop with an integrated voltage-controlled oscillator VCO, and the output frequency range of the loop is 9.75 GHz to 10.6 GHz;

[0075] The center frequency of the receiving No. 1 voltage-controlled reflective phase shifter 23 and the receiving No. 2 voltage-controlled reflective phase shifter 26 is 25 MHz, the control voltage is 0-5 V, and the phase shift range after frequency multiplication by the frequency synthesizer is 0-360 degrees.

[0076] At the intermediate frequency of 1.955~1.965GHz, the antenna receives two service carrier signal spectra with good signal quality.

[0077] The control unit of the transceiver channel is composed of a microcontroller 35, a first dual-channel digital-to-analog converter 36 and a second dual-channel digital-to-analog converter 37.

[0078] Each amplitude signal output terminal of the microcontroller 35 is connected to the control terminal of the transmitting digital controlled attenuator No. 1 3, the transmitting digital controlled attenuator No. 2 12, the receiving digital controlled attenuator No. 1 18 and the receiving digital controlled attenuator No. 2 31 respectively;

[0079] The transmitting phase signal output terminal of the microcontroller 35 is connected to the digital signal input terminal of the first dual-channel digital-to-analog converter 36, the control voltage output terminal 1 of the first dual-channel digital-to-analog converter 36 is connected to the control terminal of the transmitting first voltage-controlled reflective phase shifter 7, and the control voltage output terminal 2 of the first dual-channel digital-to-analog converter 36 is connected to the control terminal of the transmitting second voltage-controlled reflective phase shifter 11;

[0080] The receiving phase signal output terminal of the microcontroller 35 is connected to the digital signal input terminal of the second dual-channel digital-to-analog converter 37, the control voltage output terminal 1 of the second dual-channel digital-to-analog converter 37 is connected to the control terminal of the receiving voltage-controlled reflective phase shifter 23, and the control voltage output terminal 2 of the second dual-channel digital-to-analog converter 37 is connected to the control terminal of the receiving voltage-controlled reflective phase shifter 26.

[0081] First, the amplitude and phase of the horizontal and vertical polarization links of the transceiver channel are aligned by automatic calibration, and then the amplitude control word and phase control word of the horizontal and vertical polarization waves are obtained by looking up the table according to the required polarization angle, and the amplitude and phase of the horizontal polarization and vertical polarization waves of the transceiver channel are adjusted respectively. The microcontroller 35 is connected to each digitally controlled attenuator to adjust the amplitude of the transceiver link.

[0082] The microcontroller 35 controls the No. 1 dual-channel digital-to-analog converter 36 to output two control voltages to the No. 1 transmitting voltage-controlled reflective phase shifter 7 and the No. 2 transmitting voltage-controlled reflective phase shifter 11 to complete the phase adjustment of the transmitting link.

[0083] The microcontroller 35 controls the second dual-channel digital-to-analog converter 37 to output two control voltages to the first receiving voltage-controlled reflective phase shifter 23 and the second receiving voltage-controlled reflective phase shifter 26 to complete the phase adjustment of the receiving link. Finally, the transmit and receive polarization adjustment range is 0-180 degrees, the accuracy is 1 degree, and the cross polarization is better than 25dB.

[0084] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An active integrated electrically polarized transceiver flat panel antenna, comprising a dual-polarized antenna panel (17), characterized in that: It also includes a transmitting intermediate frequency amplifier (1), the transmitting intermediate frequency amplifier (1) amplifies the L-band signal and then sends it to the common port of the transmitting intermediate frequency power divider (2) for equal amplitude and in-phase power division, one port of the transmitting intermediate frequency power divider (2) is connected to the transmitting port of the first duplexer (16) through a transmitting horizontal polarization link, the common port of the first duplexer (16) is connected to the horizontal polarization port of the dual-polarization antenna panel (17), so as to achieve the feeding of horizontal polarization waves; two ports of the transmitting intermediate frequency power divider (2) are connected to the transmitting port of the second duplexer (25) through a transmitting vertical polarization link, the common port of the second duplexer (25) is connected to the vertical polarization port of the dual-polarization antenna panel (17), so as to achieve the feeding of vertical polarization waves; The transmitting horizontal polarization link comprises a transmitting digital controlled attenuator No. 1 (3), a transmitting mixer No. 1 (4), a transmitting radio frequency band pass filter No. 1 (5) and a transmitting power amplifier No. 1 (6) connected in sequence, to achieve gain adjustment of the horizontal polarization signal, and to filter and amplify the horizontal polarization intermediate frequency signal after up-conversion, and then enter the transmitting port of the No. 1 duplexer (16); the transmitting vertical polarization link comprises a transmitting digital controlled attenuator No. 2 (12), a transmitting mixer No. 2 (13), a transmitting radio frequency band pass filter No. 2 (14) and a transmitting power amplifier No. 2 (15) connected in sequence, to achieve gain adjustment of the vertical polarization signal, and to filter and amplify the vertical polarization intermediate frequency signal after up-conversion, and then enter the transmitting port of the No. 2 duplexer (25); An external 10 MHz reference signal is connected to an input end of a transmitting frequency synthesizer (10); an output end of the transmitting frequency synthesizer (10) is connected to an input end of a transmitting local oscillator filter (9); an output end of the transmitting local oscillator filter (9) is connected to a common port of a transmitting local oscillator power divider (8); one port of the transmitting local oscillator power divider (8) is connected to an input end of a transmitting voltage-controlled reflective phase shifter (7); an output end of the transmitting voltage-controlled reflective phase shifter (7) is connected to a local oscillator input end of the transmitting mixer (4); two ports of the transmitting local oscillator power divider (8) are connected to an input end of a transmitting voltage-controlled reflective phase shifter (11); an output end of the transmitting voltage-controlled reflective phase shifter (11) is connected to a local oscillator input end of the transmitting mixer (13).

2. The active integrated electrically polarized transceiver flat antenna according to claim 1, characterized in that: The receiving port of the first duplexer (16) is connected to one port of the receiving intermediate frequency combiner (29) via a receiving horizontal polarization link, the receiving port of the second duplexer (25) is connected to two ports of the receiving intermediate frequency combiner (29) via a receiving vertical polarization link, the common port of the receiving intermediate frequency combiner (29) is connected to the input end of the receiving intermediate frequency amplifier (28), and the output end of the receiving intermediate frequency amplifier (28) is used as a receiving L-band signal output; the receiving horizontal polarization link comprises a receiving first low noise amplifier (21), a receiving first radio frequency bandpass filter (20), a receiving first down converter (19) and a receiving first digitally controlled attenuator ( 18), the receiving port of the No. 1 duplexer (16) is connected to the input end of the No. 1 receiving low noise amplifier (21), and the output end of the No. 1 receiving digitally controlled attenuator (18) is connected to a port of the receiving intermediate frequency combiner (29); the receiving vertical polarization link comprises a No. 2 receiving low noise amplifier (34), a No. 2 receiving radio frequency bandpass filter (33), a No. 2 receiving down converter (32) and a No. 2 receiving digitally controlled attenuator (31) which are connected in sequence, the receiving port of the No. 2 duplexer (25) is connected to the input end of the No. 2 receiving low noise amplifier (34), and the output end of the No. 2 receiving digitally controlled attenuator (31) is connected to two ports of the receiving intermediate frequency combiner (29).

3. The active integrated electrically polarized transceiver flat antenna according to claim 2, characterized in that: The output end of the receiving reference crystal oscillator (27) is connected to the common port of the receiving reference power divider (24); one port of the receiving reference power divider (24) is connected to the input end of the receiving voltage-controlled reflective phase shifter (23); the output end of the receiving voltage-controlled reflective phase shifter (23) is connected to the reference input port of the receiving frequency synthesizer (22); the output end of the receiving frequency synthesizer (22) is connected to the local oscillator input end of the receiving down-converter (19); two ports of the receiving reference power divider (24) are connected to the input end of the receiving voltage-controlled reflective phase shifter (26); the output end of the receiving voltage-controlled reflective phase shifter (26) is connected to the reference input port of the receiving frequency synthesizer (30); the output end of the receiving frequency synthesizer (30) is connected to the local oscillator input end of the receiving down-converter (32).

4. The active integrated electrically polarized transceiver flat antenna according to claim 3, characterized in that: The first receiving frequency synthesizer (22) and the second receiving frequency synthesizer (30) both use a fractional frequency phase-locked loop with an integrated voltage-controlled oscillator, and the output frequency range is 9.75 GHz to 10.6 GHz; the first receiving voltage-controlled reflective phase shifter (23) and the second receiving voltage-controlled reflective phase shifter (26) have a center frequency of 25 MHz, a control voltage of 0 to 5 V, and a phase shift range of 0 to 360 degrees after frequency multiplication by the frequency synthesizer.

5. The active integrated electrically polarized transceiver flat antenna according to claim 4, characterized in that: The control unit of the transceiver channel is composed of a microcontroller (35), a first dual-channel digital-to-analog converter (36) and a second dual-channel digital-to-analog converter (37), and each amplitude signal output end of the microcontroller (35) is respectively connected to the control ends of the first transmitting digital controlled attenuator (3), the second transmitting digital controlled attenuator (12), the first receiving digital controlled attenuator (18) and the second receiving digital controlled attenuator (31); The transmission phase signal output terminal of the microcontroller (35) is connected to the digital signal input terminal of the first dual-channel digital-to-analog converter (36), the control voltage output terminal 1 of the first dual-channel digital-to-analog converter (36) is connected to the control terminal of the first transmission voltage-controlled reflective phase shifter (7), and the control voltage output terminal 2 of the first dual-channel digital-to-analog converter (36) is connected to the control terminal of the second transmission voltage-controlled reflective phase shifter (11); The receiving phase signal output terminal of the microcontroller (35) is connected to the digital signal input terminal of the second dual-channel digital-to-analog converter (37), the control voltage output terminal 1 of the second dual-channel digital-to-analog converter (37) is connected to the control terminal of the receiving first voltage-controlled reflective phase shifter (23), and the control voltage output terminal 2 of the second dual-channel digital-to-analog converter (37) is connected to the control terminal of the receiving second voltage-controlled reflective phase shifter (26).

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