A multi-band high-integration active antenna system and a working method thereof

Abstract

The application discloses a multi-frequency-band high-integration active antenna system and a working method thereof. A power supply output end of a power supply module is connected with a power supply input end of a multi-frequency-band antenna and a sampling input end of an extraction module, an output radio frequency signal of the multi-frequency-band antenna is output to a radio frequency signal input end of a down converter through a multi-frequency-band receiver, a radio frequency signal output by the down converter is fed into a radio frequency signal input end of a waveguide filter through a wave micro converter, a radio frequency signal output by the waveguide filter is output to a radio frequency signal input end of a radio frequency amplifier through a polarization switching switch after being amplified by a low noise amplifier, and a radio frequency signal output by the radio frequency amplifier is transmitted to a radio frequency signal input end of the extraction module after being mixed by a mixer. The application utilizes the multi-frequency-band antenna to cooperate with the multi-frequency-band receiver to receive radio frequency signals of X, Ku and K frequency bands, and obtains S frequency band intermediate frequency signals after processing the radio frequency signals output by the multi-frequency-band receiver.

Description

Technical Field

[0001] This invention specifically relates to a multi-band highly integrated active antenna system and its operating method. Background Technology

[0002] Receivers used in satellite communication systems serve the same purpose as satellite portable stations, primarily for data exchange with satellites within the system. With the rapid development of satellite communication technology, the frequency bands used by satellite communication systems include C-band, Ku-band, and Ka-band, with different systems occupying different frequency band resources.

[0003] With the successful launch of China Satcom Corporation Limited's first Ka-band high-throughput satellite, China's domestic satellite communication service capabilities have achieved a leapfrog development. Existing active antennas in satellite communication systems cannot achieve multi-band collaborative operation across X, Ku, and K bands, exhibiting poor adaptability and failing to meet the demands of multi-band satellite communication services. Summary of the Invention

[0004] Objective of the invention: To provide a multi-band highly integrated active antenna system and its operating method, thereby solving the aforementioned problems existing in the prior art.

[0005] Technical Solution: A multi-band highly integrated active antenna system includes a power supply module. The power supply output terminal of the power supply module is simultaneously connected to the power supply input terminal of the multi-band antenna and the sampling input terminal of the extraction module. The RF signal output terminal of the multi-band antenna is connected to the RF signal input terminal of the multi-band receiver. The RF signal output terminal of the multi-band receiver is connected to the RF signal input terminal of a downconverter. The RF signal output terminal of the downconverter is fed into the RF signal input terminal of a waveguide filter via a wave-micro converter. The RF signal output terminal of the waveguide filter is connected to the RF signal input terminal of a low-noise amplifier. The RF signal output terminal of the low-noise amplifier is connected to the RF signal input terminal of the RF amplifier via a polarization switching switch. The RF signal output terminal of the RF amplifier is connected to the RF signal input terminal of a mixer. The RF signal output terminal of the mixer is connected to the RF signal input terminal of the extraction module.

[0006] Preferably, the multi-band antenna includes a dual-element microstrip antenna and a K-band antenna. The signal output terminal of the dual-element microstrip antenna is connected to the signal input terminal of the multi-band receiver, and the signal output terminal of the K-band antenna is connected to the signal input terminal of the multi-band receiver. The dual-element microstrip antenna includes an X-band polarized antenna, a Ku-band polarized antenna, and a feed network. The X-band polarized antenna and the Ku-band polarized antenna are orthogonally polarized. The feed point of the dual-element microstrip antenna is connected to the feed point of the feed network via a metal probe. The signal output terminal of the dual-element microstrip antenna is connected to the radio frequency (RF) signal input terminal of the multi-band receiver, and the signal output terminal of the K-band antenna is connected to the RF signal input terminal of the multi-band receiver.

[0007] Preferably, the K-band antenna includes two sets of dielectric substrates, with a feeding network arranged between the dielectric substrates. Two sets of feeding probes are mounted on one of the dielectric substrates, and a radiating patch is provided on the top surface of the top dielectric substrate. The two sets of feeding probes are located at the two orthogonal edges of the radiating patch, and the two signals have a 90° phase difference, forming a circularly polarized wave.

[0008] Preferably, the power module includes a DC / DC power conversion circuit, an LDO power conversion circuit, and an electronic control switching circuit. The power input terminal of the DC / DC power conversion circuit is connected to an external integrated RF module. The DC / DC power conversion circuit converts the 18V / 24V high voltage to a 6V power supply voltage. The output terminal of the DC / DC power conversion circuit is connected to the input terminal of the LDO power conversion circuit, providing a pre-stage power supply for the LDO power conversion circuit. The output terminal of the LDO power conversion circuit is simultaneously connected to the power input terminals of the X-band polarized antenna, the Ku-band polarized antenna, and the K-band antenna.

[0009] Preferably, the DC / DC power conversion circuit includes a chip U1, resistors R10, R11, R12, and R15, capacitors C21, C22, C23, C27, C28, and C29, and an inductor L6. Pin 3 of the chip U1 is simultaneously connected to the integrated RF module, one end of capacitor C21, one end of capacitor C22, and pin 1 of the chip U1. The other end of capacitor C21 is grounded, and the other end of capacitor C22 is grounded. Pin 4 of the chip U1 is simultaneously connected to one end of resistor R10 and one end of resistor R11. The other end of R10 is grounded. The other end of resistor R11 is connected to one end of resistor R12. Resistor R11 is connected in parallel with resistor R15. The other end of resistor R12 is simultaneously connected to pin 5 of chip U1, one end of capacitor C28, one end of capacitor C29, and one end of inductor L6. The other end of capacitor C28 is grounded. The other end of capacitor C29 is grounded. The other end of inductor L6 is simultaneously connected to one end of capacitor C27, one end of capacitor C23, and the input terminal of LDO power conversion circuit. The other end of capacitor C23 is grounded. The other end of capacitor C27 is grounded.

[0010] Preferably, the chip U1 is a chip of model SGM2211.

[0011] Preferably, the LDO power conversion circuit includes a 3.5V conversion sub-circuit and a 5V conversion sub-circuit. The input terminal of the 5V conversion sub-circuit is connected to the output terminal of the DC / DC power conversion circuit. The output terminal of the 5V conversion sub-circuit is simultaneously connected to the input terminal of the 3.5V conversion sub-circuit, the power supply input terminal of the K-band antenna, and the power supply input terminal of the Ku-band polarized antenna. The output terminal of the 3.5V conversion sub-circuit is connected to the power supply input terminal of the X-band polarized antenna. Preferably, the extraction module includes a power extraction circuit and a reference signal extraction circuit. The power extraction circuit and the reference signal extraction circuit are connected in series. The input terminal of the power extraction circuit is connected to the output terminal of the DC / DC power conversion circuit, and the input terminal of the reference signal extraction circuit is connected to the RF signal output terminal of the mixer.

[0012] Preferably, the extraction module includes capacitors C5, C4, C3, C2, and C1, resistors R1, R2, and R3, inductors L1, L2, L3, and L4, a 4-port, a 3-port, a 2-port, and a 1-port. The 4-port is connected to the DC / DC power conversion circuit. One end of inductor L4 is connected to both the 4-port and one end of capacitor C5. The other end of capacitor C5 is grounded. The other end of inductor L4 is connected to one end of capacitor C3, one end of inductor L3, and one end of capacitor C4. The other end of capacitor C3 is grounded. The other end of 4 is connected to one end of resistor R2 and one end of resistor R1. The other end of resistor R2 is grounded. The other end of resistor R1 is connected to one end of resistor R3 and port 3. The other end of resistor R3 is grounded. The other end of inductor L3 is connected to one end of capacitor C2 and one end of inductor L2. The other end of capacitor C2 is grounded. The other end of inductor L2 is connected to one end of capacitor C1 and port 2. The other end of capacitor C1 is connected to one end of inductor L1 and port 1. The other end of inductor L1 is grounded. Port 1 is connected to the RF signal output terminal of the mixer.

[0013] A method for operating a multi-band highly integrated active antenna, implemented using the aforementioned multi-band highly integrated active antenna system, includes the following steps: S1. Power is supplied to the multi-band antenna and extraction module through the power module; S2. The multi-band antenna transmits radio frequency (RF) signals to the multi-band receiver. The multi-band antenna outputs X-band, Ku-band, and K-band RF signals respectively. When the multi-band receiver receives the X-band and Ku-band RF signals, they are down-converted and output as RF signals. The RF signals output by the down-converter are fed into X-band and Ku-band waveguide filters by a wavelet converter to suppress out-of-band interference signals, then amplified with low noise. After passing through a polarization switching switch and an amplifier, they are sent to a mixer to complete down-conversion, obtaining an S-band intermediate frequency (IF) signal. The IF signal is then filtered and amplified before being output. Similarly, when the multi-band receiver receives the K-band signal, it is down-converted and output as RF signals. The RF signals output by the down-converter are fed into a K-band waveguide filter by a wavelet converter to suppress out-of-band interference signals, then amplified with low noise. After passing through a polarization switching switch and an amplifier, they are sent to a mixer to complete down-conversion, obtaining an S-band IF signal. The IF signal is then filtered and amplified before being output. S3. Use the extraction module to obtain the output signal of the mixer and the external reference signal. Use the external reference signal as the frequency reference source of the multi-band receiver to correct the local oscillator signal frequency. The local oscillator signal generated by integer / fraction frequency division technology based on the external reference signal is sent to the mixer. S4. The DC / DC power conversion circuit in the power module provides a +6V power supply voltage to the X-band polarized antenna and the Ku-band polarized antenna, and preferably outputs at least +5V and 3.5V power supply voltages after passing through the LDO power conversion circuit.

[0014] Beneficial Effects: This invention relates to a multi-band highly integrated active antenna system and its operating method. It utilizes a multi-band antenna in conjunction with a multi-band receiver to receive X-band, Ku-band, and K-band radio frequency signals. The radio frequency signal output from the multi-band receiver is fed into a waveguide filter via a frequency converter and a waveguide-microwave converter. After polarization switching and amplification, it is sent to a mixer for down-conversion to obtain an S-band intermediate frequency signal. The intermediate frequency signal is then filtered and amplified before being output. Simultaneously, a sampling module acquires the output voltage of the DC / DC power conversion circuit in the power supply module, realizing the conversion of the DC / DC power conversion circuit switching information into a low-voltage polarization switching control signal. This signal is used to control the polarization switching switch and the modulation of the LDO power conversion circuit, thereby ensuring high polarization isolation. Attached Figure Description

[0015] Figure 1 This invention describes the working principle of the X and Ku band active antennas. Figure 2 This describes the working principle of the Ka-band active antenna of the present invention. Figure 3 This is a block diagram of the K-band downconverter of the present invention; Figure 4 This is a circuit diagram of the extraction module of the present invention; Figure 5 This refers to the insertion loss from the RF port to the main port in this invention; Figure 6 This refers to the insertion loss from the 10MHz port to the main port in this invention; Figure 7 This refers to the 10MHz port-to-RF port isolation of the present invention; Figure 8 This is a circuit diagram of the DC / DC power conversion of the present invention; Figure 9 This is a circuit diagram of the LDO power conversion circuit of the present invention; Figure 10 The noise figures for downconversion in the X and Ku bands of this invention; Figure 11 This refers to the downconversion gain in the X and Ku bands of this invention; Figure 12 The K-band downconversion noise figure of this invention; Figure 13 This refers to the K-band downconversion gain of this invention. Detailed Implementation

[0016] like Figures 1 to 13 As shown, this invention provides a technical solution: a multi-band highly integrated active antenna system, including a power supply module. The power supply output terminal of the power supply module is simultaneously connected to the power supply input terminal of the multi-band antenna and the sampling input terminal of the extraction module. The power supply module includes a DC / DC power conversion circuit, an LDO power conversion circuit, and an electronic control switching circuit. The multi-band antenna includes a dual-element microstrip antenna and a K-band antenna. The signal output terminal of the dual-element microstrip antenna is connected to the signal input terminal of the multi-band receiver, and the signal output of the K-band antenna is connected to the signal input terminal of the multi-band receiver. The dual-element microstrip antenna includes an X-band polarized antenna, a Ku-band polarized antenna, and a feed network. The X-band polarized antenna and the Ku-band polarized antenna are orthogonally polarized. The feed point of the dual-element microstrip antenna is connected to the feed point of the feed network via a metal probe. The signal output terminal of the dual-element microstrip antenna is connected to the RF signal input terminal of the multi-band receiver. The signal output of the K-band antenna is connected to the RF signal input of the multi-band receiver. The power supply output of the DC / DC power converter is simultaneously connected to the power supply inputs of the X-band polarized antenna, the Ku-band polarized antenna, and the LDO power converter. The outputs of the X-band, Ku-band, and K-band antennas are connected to the RF signal input of the multi-band receiver. The RF signal output of the multi-band receiver is connected to the RF signal input of the downconverter. The RF signal output from the downconverter is fed into the RF signal input of the waveguide filter via a wave converter. The RF signal output of the waveguide filter is connected to the RF signal input of the low-noise amplifier. The RF signal output of the low-noise amplifier is connected to the RF signal input of the RF amplifier via a polarization switching switch. The RF signal output of the RF amplifier is connected to the RF signal input of the mixer. Figures 10 to 13 As shown, test data for X-band, Ku-band, and K-band RF signals are obtained. The RF signal output of the mixer is connected to the RF signal input of the extraction module. A multi-band antenna and a multi-band receiver are used to receive the X-band, Ku-band, and K-band RF signals. The RF signal output from the multi-band receiver is fed into a waveguide filter via a frequency converter and a waveguide-microwave converter. After polarization switching and amplification, it is sent to the mixer to complete the down-conversion to obtain the S-band intermediate frequency signal. The intermediate frequency signal is filtered and amplified before being output. At the same time, the sampling module is used to obtain the output voltage of the DC / DC power conversion circuit in the power supply module, realizing the conversion of the DC / DC power conversion circuit switching information into a low-voltage polarization switching control signal. This signal is used to control the polarization switching switch and the first-stage low-noise amplifier power supply modulation, thereby ensuring high polarization isolation.

[0017] In a further embodiment, the K-band antenna includes two sets of dielectric substrates, with a feed network arranged between the dielectric substrates. Two sets of feed probes are mounted on one of the dielectric substrates, and a radiating patch is provided on the top surface of the top dielectric substrate. The two sets of feed probes are located at the two orthogonal edges of the radiating patch, with a 90° phase difference between the two signals, forming a circularly polarized wave. This causes the radiating patch to generate a circularly polarized wave, meeting the circularly polarized transmission requirements of the K-band antenna and ensuring stable signal radiation without polarization distortion.

[0018] In a further embodiment, the extraction module includes a power extraction circuit and a reference signal extraction circuit, which are connected in series. The input of the power extraction circuit is connected to the output of a DC / DC power converter circuit. The DC / DC power converter circuit efficiently converts the 18V / 24V high voltage into a +6V power supply voltage close to that used by active circuits. Then, through an LDO power converter circuit, it outputs low-ripple, highly stable +5V and 3.5V power supply voltages, respectively, for the X-band polarized antenna, Ku-band polarized antenna, and K-band polarized antenna. The antenna and sampling module are powered, and the switching circuit converts the 18V / 24V power supply switching information into a low-voltage polarization switching control signal. This signal controls the polarization switching switch and the first-stage low-noise amplifier power supply modulation, ensuring high polarization isolation. The input of the reference signal extraction circuit is connected to the RF signal output of the mixer. In this embodiment, the reference signal extraction circuit mainly extracts the mixed signal of the 18V / 24V power supply and the 10MHz reference signal, outputting the intermediate frequency signal to the integrated RF module. The 18V / 24V power supply is sent to the electronically controlled switching circuit for voltage conversion. Figure 5 As shown, 10MHz is used as the phase-locked reference signal for the 100MHz voltage-controlled crystal oscillator.

[0019] In a further embodiment, such as Figure 8 and Figure 9As shown, the DC / DC power conversion circuit includes chip U1, resistors R10, R11, R12, R15, capacitors C21, C22, C23, C27, C28, C29, and inductor L6. Chip U1 is an SGM2211 model chip. Pin 3 of chip U1 is connected to the integrated RF module, one end of capacitor C21, one end of capacitor C22, and pin 1 of chip U1. The other end of capacitor C21 and the other end of capacitor C22 are grounded. Pin 4 of chip U1 is connected to one end of resistor R10 and one end of resistor R11. The other end of resistor R10 is grounded. The other end of resistor R11 is connected to one end of resistor R12. Resistor R11 is connected in parallel with resistor R15. The other end of resistor R12 is simultaneously connected to pin 5 of chip U1, one end of capacitor C28, one end of capacitor C29, and one end of inductor L6. The other end of capacitor C28 is grounded, and the other end of capacitor C29 is grounded. The other end of inductor L6 is simultaneously connected to one end of capacitor C27, one end of capacitor C23, and the input terminal of the LDO power conversion circuit, outputting a 6V voltage to power the LDO power conversion circuit. The other end of capacitor C23 is grounded, and the other end of capacitor C27 is grounded. Figure 9 The LDO power conversion circuit shown outputs 5V and 3.5V voltages, and uses the SGM8740 chip of chip U8 to compare the voltages and achieve electronic control switching.

[0020] In a further embodiment, such as Figure 4 As shown, the extraction module includes capacitors C5, C4, C3, C2, and C1; resistors R1, R2, and R3; inductors L1, L2, L3, and L4; a 4-port terminal; a 3-port terminal; a 2-port terminal; and a 1-port terminal. The 4-port terminal is connected to the DC / DC power conversion circuit. One end of inductor L4 is connected to both the 4-port terminal and one end of capacitor C5. The other end of capacitor C5 is grounded. The other end of inductor L4 is connected to one end of capacitor C3, one end of inductor L3, and one end of capacitor C4. The other end of capacitor C3 is grounded. The capacitor C4... The other end of the inductor L3 is connected to one end of resistor R2 and one end of resistor R1. The other end of resistor R2 is grounded. The other end of resistor R1 is connected to one end of resistor R3 and port 3. The other end of resistor R3 is grounded. The other end of inductor L3 is connected to one end of capacitor C2 and one end of inductor L2. The other end of capacitor C2 is grounded. The other end of inductor L2 is connected to one end of capacitor C1 and port 2. The other end of capacitor C1 is connected to one end of inductor L1 and port 1. The other end of inductor L1 is grounded. Port 1 is connected to the RF signal output terminal of the mixer. Figure 6The figure shows the insertion loss from the 10MHz port to the main port. Figure 7 The figure shows the isolation from port 1 to port 1 at 10MHz.

[0021] A method for operating a multi-band highly integrated active antenna, implemented using the aforementioned multi-band highly integrated active antenna system, includes the following steps: Step 1: Power the multi-band antenna and extraction module through the power module; Step 2: The multi-band antenna transmits radio frequency (RF) signals to the multi-band receiver. The multi-band antenna outputs X-band, Ku-band, and K-band RF signals respectively. When the multi-band receiver receives the X-band and Ku-band RF signals, they are down-converted and output as RF signals. The RF signals output from the down-converter are fed into X-band and Ku-band waveguide filters by a wavelet converter to suppress out-of-band interference signals, then amplified with low noise. After passing through a polarization switch and an amplifier, they are sent to a mixer to complete down-conversion, obtaining an S-band intermediate frequency (IF) signal. The IF signal is then filtered and amplified before being output. Similarly, when the multi-band receiver receives the K-band signal, it is down-converted and output as RF signals. The RF signals output from the down-converter are fed into a K-band waveguide filter by a wavelet converter to suppress out-of-band interference signals, then amplified with low noise. After passing through a polarization switch and an amplifier, they are sent to a mixer to complete down-conversion, obtaining an S-band IF signal. The IF signal is then filtered and amplified before being output.

[0022] Step 3: Use the extraction module to obtain the mixer's output signal and external reference signal. Use the external reference signal as the frequency reference source for the multi-band receiver to correct the local oscillator signal frequency. In this embodiment, based on a 10MHz reference signal, first use phase-locked loop (PLL) technology to lock a 100MHz voltage-controlled crystal oscillator, and then use integer / fractional frequency division technology to generate a 17.4GHz local oscillator signal which is sent to the mixer. Figure 10 As shown, the noise figure fluctuation between the horizontal and vertical polarization paths is within ±0.1dB, and the noise figure across the entire X and KU bands is ≤2dB. Figure 11 As shown, the gain consistency of the horizontal and vertical polarization paths is within ±1dB, the in-band ripple of the entire X and KU paths is ≤±1dB, and the gain of the entire link is ≥57dB. Figure 12 As shown, the noise figure within the entire K-band is ≤2.6dB. Figure 13 As shown, the gain for the entire K-band is ≥65dB, and the in-band ripple is ≤±1.5dB.

[0023] Step 4: The DC / DC power conversion circuit in the power module provides a +6V power supply voltage to the X-band polarized antenna and the Ku-band polarized antenna. After passing through the LDO power conversion circuit, it outputs at least +5V and 3.5V power supply voltages, which are converted into low-voltage polarization switching control signals to control the polarization switching switch and the modulation of the LDO power conversion circuit, thereby ensuring high polarization isolation.

[0024] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A multi-band highly integrated active antenna system, characterized in that, The system includes a power supply module, whose power output is simultaneously connected to the power input of a multi-band antenna and the sampling input of an extraction module. The RF signal output of the multi-band antenna is connected to the RF signal input of a multi-band receiver. The RF signal output of the multi-band receiver is connected to the RF signal input of a down-converter. The RF signal output from the down-converter is fed into the RF signal input of a waveguide filter via a wave-to-microwave converter. The RF signal output of the waveguide filter is connected to the RF signal input of a low-noise amplifier. The RF signal output of the low-noise amplifier is connected to the RF signal input of an RF amplifier via a polarization switch. The RF signal output of the RF amplifier is connected to the RF signal input of a mixer. The RF signal output of the mixer is connected to the RF signal input of the extraction module. The multi-band antenna includes a dual-element microstrip antenna and a K-band antenna. The signal output terminal of the dual-element microstrip antenna is connected to the signal input terminal of the multi-band receiver, and the signal output terminal of the K-band antenna is connected to the signal input terminal of the multi-band receiver. The dual-element microstrip antenna includes an X-band polarized antenna, a Ku-band polarized antenna, and a feed network. The X-band polarized antenna and the Ku-band polarized antenna are orthogonally polarized. The feed point of the dual-element microstrip antenna is connected to the feed point of the feed network through a metal probe. The signal output terminal of the dual-element microstrip antenna is connected to the RF signal input terminal of the multi-band receiver, and the signal output terminal of the K-band antenna is connected to the RF signal input terminal of the multi-band receiver. The extraction module includes a power extraction circuit and a reference signal extraction circuit. The power module includes a DC / DC power conversion circuit. The power extraction circuit and the reference signal extraction circuit are connected in series. The input terminal of the power extraction circuit is connected to the output terminal of the DC / DC power conversion circuit, and the input terminal of the reference signal extraction circuit is connected to the RF signal output terminal of the mixer.

2. The multi-band highly integrated active antenna system according to claim 1, characterized in that, The K-band antenna includes two sets of dielectric substrates, with a feeding network arranged between the dielectric substrates. Two sets of feeding probes are installed on one of the dielectric substrates, and a radiating patch is provided on the top surface of the top dielectric substrate. The two sets of feeding probes are located at the two orthogonal edges of the radiating patch, and the two signals have a 90° phase difference, forming a circularly polarized wave.

3. The multi-band highly integrated active antenna system according to claim 1, characterized in that, The power module also includes an LDO power conversion circuit and an electronic control switching circuit. The power input terminal of the DC / DC power conversion circuit is connected to an external integrated RF module. The DC / DC power conversion circuit converts the 18V / 24V high voltage to a 6V power supply voltage. The output terminal of the DC / DC power conversion circuit is connected to the input terminal of the LDO power conversion circuit, providing a pre-stage power supply for the LDO power conversion circuit. The output terminal of the LDO power conversion circuit is simultaneously connected to the power input terminals of the X-band polarized antenna, the Ku-band polarized antenna, and the K-band antenna.

4. The multi-band highly integrated active antenna system according to claim 3, characterized in that, The DC / DC power conversion circuit includes chip U1, resistors R10, R11, R12, R15, capacitors C21, C22, C23, C27, C28, C29, and inductor L6. Pin 3 of chip U1 is simultaneously connected to the integrated RF module, one end of capacitor C21, one end of capacitor C22, and pin 1 of chip U1. The other end of capacitor C21 and the other end of capacitor C22 are grounded. Pin 4 of chip U1 is simultaneously connected to one end of resistor R10 and one end of resistor R11. The other end of resistor R11 is grounded. The other end of resistor R11 is connected to one end of resistor R12. Resistor R11 is connected in parallel with resistor R15. The other end of resistor R12 is simultaneously connected to pin 5 of chip U1, one end of capacitor C28, one end of capacitor C29, and one end of inductor L6. The other end of capacitor C28 is grounded. The other end of capacitor C29 is grounded. The other end of inductor L6 is simultaneously connected to one end of capacitor C27, one end of capacitor C23, and the input terminal of LDO power conversion circuit. The other end of capacitor C23 is grounded. The other end of capacitor C27 is grounded.

5. A multi-band highly integrated active antenna system according to claim 4, characterized in that, The chip U1 is a chip of model SGM2211.

6. A multi-band highly integrated active antenna system according to claim 4, characterized in that, The LDO power conversion circuit includes a 3.5V conversion sub-circuit and a 5V conversion sub-circuit. The input terminal of the 5V conversion sub-circuit is connected to the output terminal of the DC / DC power conversion circuit. The output terminal of the 5V conversion sub-circuit is simultaneously connected to the input terminal of the 3.5V conversion sub-circuit, the power supply input terminal of the K-band antenna, and the power supply input terminal of the Ku-band polarized antenna. The output terminal of the 3.5V conversion sub-circuit is connected to the power supply input terminal of the X-band polarized antenna.

7. A multi-band highly integrated active antenna system according to claim 1, characterized in that, The extraction module includes capacitors C5, C4, C3, C2, and C1; resistors R1, R2, and R3; inductors L1, L2, L3, and L4; a 4-port terminal; a 3-port terminal; a 2-port terminal; and a 1-port terminal. The 4-port terminal is connected to the DC / DC power conversion circuit. One end of inductor L4 is connected to both the 4-port terminal and one end of capacitor C5. The other end of capacitor C5 is grounded. The other end of inductor L4 is connected to one end of capacitor C3, one end of inductor L3, and one end of capacitor C4. The other end of capacitor C3 is grounded. The capacitor C4... The other end is connected to one end of resistor R2 and one end of resistor R1. The other end of resistor R2 is grounded. The other end of resistor R1 is connected to one end of resistor R3 and port 3. The other end of resistor R3 is grounded. The other end of inductor L3 is connected to one end of capacitor C2 and one end of inductor L2. The other end of capacitor C2 is grounded. The other end of inductor L2 is connected to one end of capacitor C1 and port 2. The other end of capacitor C1 is connected to one end of inductor L1 and port 1. The other end of inductor L1 is grounded. Port 1 is connected to the RF signal output terminal of the mixer.

8. A method for operating a multi-band highly integrated active antenna, implemented using a multi-band highly integrated active antenna system as described in any one of claims 1-7, characterized in that... Includes the following steps: S1. Power is supplied to the multi-band antenna and extraction module through the power module; S2. The multi-band antenna transmits radio frequency (RF) signals to the multi-band receiver. The multi-band antenna outputs X-band, Ku-band, and K-band RF signals respectively. When the multi-band receiver receives the X-band and Ku-band RF signals, they are down-converted and output as RF signals. The RF signals output by the down-converter are fed into X-band and Ku-band waveguide filters by a wavelet converter to suppress out-of-band interference signals, then amplified with low noise. After passing through a polarization switching switch and an amplifier, they are sent to a mixer to complete down-conversion, obtaining an S-band intermediate frequency (IF) signal. The IF signal is then filtered and amplified before being output. Similarly, when the multi-band receiver receives the K-band signal, it is down-converted and output as RF signals. The RF signals output by the down-converter are fed into a K-band waveguide filter by a wavelet converter to suppress out-of-band interference signals, then amplified with low noise. After passing through a polarization switching switch and an amplifier, they are sent to a mixer to complete down-conversion, obtaining an S-band IF signal. The IF signal is then filtered and amplified before being output. S3. Use the extraction module to obtain the output signal of the mixer and the external reference signal. Use the external reference signal as the frequency reference source of the multi-band receiver to correct the local oscillator signal frequency. The local oscillator signal generated by integer / fraction frequency division technology based on the external reference signal is sent to the mixer. S4. The DC / DC power conversion circuit in the power module provides a +6V power supply voltage for the X-band polarized antenna and the Ku-band polarized antenna, and outputs at least +5V and 3.5V power supply voltages after passing through the LDO power conversion circuit, providing a stable power supply.

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