Method and device for monitoring phased-array antenna channel

Abstract

The invention discloses a channel monitoring device for a phased-array antenna. The channel monitoring device comprises an active sub-array, a main antenna feed network, a monitoring unit and a monitoring network, a plurality of monitoring units are integrated in the active sub-array, the active sub-array comprises a plurality of active channels, a main antenna radiation unit and a power supply control unit, and the main antenna feed network is used for realizing combination and power division of radio frequency signals of the active sub-array; the monitoring network is used for selecting a plurality of monitoring channels corresponding to the plurality of sub-arrays; according to the channel monitoring design of the phased-array antenna, a passive monitoring antenna is adopted and nested and integrated in an active sub-array, the problem of high-density phased-array antenna channel monitoring is solved, meanwhile, sub-array-level distributed monitoring is adopted, the robustness of the monitoring method is enhanced, only a monitoring network needs to be replaced during array plane scale expansion, and the monitoring efficiency is improved. The problem of large fluctuation of active channel position signals when signals are acquired in a coupling mode is solved, the method has strong engineering implementability, the system complexity is not increased, and the cost is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of phased array antenna monitoring, and in particular relates to a method and device for monitoring a phased array antenna channel. Background Art

[0002] During the development of phased array antennas, in order to ensure that the antenna performance can meet the design requirements, array surface testing must be carried out to calibrate the array channel amplitude and phase in large quantities to eliminate related errors and make the array performance reach the required technical conditions or optimal state. During operation, it is difficult to measure the state of the array with the help of auxiliary equipment. Usually, it is necessary to have its own monitoring or calibration system to evaluate the antenna performance or calibrate it. Depending on the injection or acquisition point of the measurement signal, the array surface monitoring method is generally divided into two types: internal monitoring and external monitoring.

[0003] Among them, array monitoring: used to qualitatively judge the quality of the channel, with low requirements; Array correction: quantitatively collect channel amplitude and phase parameters, compare them with reference data, reconfigure array compensation data, and have in-band characteristic requirements for the collected data.

[0004] At present, the main method of coupled external monitoring is to use auxiliary antennas as external monitoring units. The main problem is that a single monitoring unit needs to cover a large area, and the monitoring coupling signal is too low at a location far away from the monitoring unit, resulting in a high probability of false alarm. Internal detection has high accuracy, but the introduction of a huge monitoring network increases the complexity of the system sharply and the cost is high. It is especially not suitable for high-density integrated tile arrays, chip arrays, etc. Summary of the invention

[0005] The purpose of the present invention is to provide a monitoring method for a phased array antenna channel, which adopts a nested design of integrating multiple monitoring units in an active sub-array, obtains monitoring signals using the radiation coupling path between antenna units, and reasonably designs the number and distribution positions of the monitoring units according to the sub-array scale. At the same time, the sub-array-level design can enhance the scalability of the system.

[0006] To solve the above problems, the technical solution of the present invention is: A monitoring method for a phased array antenna channel is used for a monitoring device consisting of an active subarray, a main antenna feed network, a monitoring unit and a monitoring network; the method comprises the following steps: When monitoring the transmission channel, each time the transmission channel of an active transceiver component in the active sub-array is turned on, the RF excitation signal is input into the active transceiver component for amplification after being divided by the main antenna feeding network, and then output to the corresponding main antenna radiating unit; the monitoring unit in the active sub-array couples and receives the output signal of the main antenna radiating unit, inputs it into the monitoring network, and then outputs it to the receiver for processing and combination analysis; When monitoring the receiving channel, each time the receiving channel of one active transceiver component in the active sub-array is opened, a monitoring excitation signal is generated through a coupling circuit and input into the monitoring network, which is then output from the monitoring network to the monitoring unit for radiation; the transceiver component of the active sub-array corresponding to the monitoring unit traverses and extracts the output signal of the coupled receiving monitoring unit, which is then input into the main antenna feeding network and then output to the receiver for processing and combination analysis; Among them, the monitoring network shares the RF link of the transmitting and receiving branch monitoring signal. When monitoring the transmitting channel, the receiver dynamic range corresponding to the monitoring signal is adapted through the attenuator; when monitoring the receiving channel, the monitoring unit is selected through the power division circuit and the RF single-channel switch.

[0007] According to an embodiment of the present invention, the coverage monitoring area of ​​the monitoring unit is determined according to the array distribution of the active sub-array, and a corresponding simulation model is established to calculate the coupling parameters between the main antenna radiation unit and the monitoring unit at different positions.

[0008] According to an embodiment of the present invention, when each active transceiver component in the coverage monitoring area of ​​the monitoring unit is traversed and opened, the corresponding minimum value of the RF signal power is greater than the receiver sensitivity, and the power fluctuation range is smaller than the dynamic range of the receiver.

[0009] According to an embodiment of the present invention, multiple passive monitoring units are integrated in the active sub-array, and the monitoring units are configured in the same form as the main antenna radiation unit to collect the radio frequency signal of each active transceiver component of the active sub-array through electromagnetic coupling.

[0010] According to an embodiment of the present invention, multiple active sub-arrays are used for distributed monitoring, and the radio frequency signals of the multiple active sub-arrays are power-divided or combined through the main antenna feeding network.

[0011] A monitoring device for a phased array antenna channel, comprising: an active sub-array, a main antenna feeding network, a monitoring unit and a monitoring network; The active sub-array includes active transceiver components of several channels, a main antenna radiation unit, and a power supply control unit. The power supply control unit is electrically connected to the active transceiver component to provide an electrical control signal to the active transceiver component. The main antenna radiation unit is connected to the active transceiver component to radiate the radio frequency signal sent by the active transceiver component. The monitoring unit is nested and integrated in the array plane of the active sub-array, adopts the same form as the main antenna radiation unit, and collects the radio frequency signal of each active transceiver component of the active sub-array through electromagnetic coupling; The main antenna feed network is configured to realize the combining and power splitting of the active sub-array radio frequency signals; The monitoring network is configured as a common transceiver branch monitoring signal radio frequency link. When monitoring the transmission channel, the receiver dynamic range corresponding to the monitoring signal is adapted through an attenuator; when monitoring the receiving channel, the monitoring unit is selected through a power division circuit and a radio frequency single-way switch.

[0012] According to an embodiment of the present invention, a plurality of active sub-arrays are included, and the plurality of active sub-arrays implement distributed monitoring, and a plurality of monitoring signals are combined through the main antenna feeding network.

[0013] According to an embodiment of the present invention, a plurality of monitoring units are integrated in the active sub-array, and the number of the monitoring units is determined by the number of active transceiver components of the active sub-array, the receiving sensitivity and the receiving dynamic range of the receiver.

[0014] According to an embodiment of the present invention, the monitoring network includes a ring circuit, a fixed attenuator, and a power division circuit connected in sequence, and each branch port of the power division circuit is connected to a single-pole single-throw radio frequency switch; The ring circuit is used to realize the sharing of the radio frequency link of the receiving and transmitting branch monitoring signals in the monitoring network; The fixed attenuator is used to adapt the dynamic range of the receiver corresponding to the monitoring signal to prevent the monitoring signal from exceeding the receiving saturation input requirement of the receiver; The power division circuit and the radio frequency switch are used to select the monitoring unit to avoid crosstalk between signals of different monitoring units.

[0015] According to an embodiment of the present invention, the ring circuit is a circulator, the circulator includes a first port, a second port, and a third port, the first port is connected to a fixed attenuator, the second port is connected to a receiver, and the third port is connected to a radio frequency excitation; When monitoring the transmission channel, the RF excitation signal is divided by the main antenna feeding network, input into the active transceiver component for amplification, and then output to the corresponding main antenna radiating unit; the monitoring unit in the active subarray couples and receives the output signal of the main antenna radiating unit, and inputs it into the monitoring network. In the monitoring network, the signal is output from the first port of the circulator to the second port to the receiver for processing and combination analysis.

[0016] When monitoring the receiving channel, a -20dB signal is coupled through a coupling circuit as a monitoring excitation signal and input into the monitoring network. In the monitoring network, the signal is output from the third port to the first port and radiated out to the monitoring unit, thereby realizing the sharing of the RF link of the transceiver branch monitoring signal in the monitoring network.

[0017] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: The monitoring method of the phased array antenna channel in one embodiment of the present invention aims at solving the problem of the difficulty in monitoring the existing phased array antenna. By integrating multiple monitoring units with an active sub-array, the requirements for the dynamic range of the receiver are reduced. Furthermore, the coupled monitoring technology is used to minimize the impact of monitoring on the main functions of the phased array, thereby reducing the amount of equipment and improving engineering feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a monitoring device for a phased array antenna channel in an embodiment of the present invention; Figure 2 is a distribution diagram of an active sub-array of 128 units in one embodiment of the present invention; Figure 3 A monitoring area simulation model covered by a monitoring unit in an embodiment of the present invention; Figure 4 A simulation curve of the coupling degree of the monitoring area covered by the monitoring unit in one embodiment of the present invention; Figure 5 It is a measured curve of coupling degree of monitoring area covered by the monitoring unit in one embodiment of the present invention; Figure 6 The figure is a layout diagram of an antenna array consisting of three active sub-arrays in one embodiment of the present invention; Figure 7 is a schematic diagram of a circulator in one embodiment of the present invention; Figure 8 The figure is a monitoring radio frequency link diagram of an antenna array plane composed of three active sub-arrays in one embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following is a further detailed description of a monitoring method and device for a phased array antenna channel proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0020] Please see Figure 1 This embodiment provides a monitoring device for a phased array antenna channel, the device comprising: an active sub-array, a main antenna feeding network, a monitoring unit and a monitoring network; wherein the active sub-array comprises active transceiver components (TR components) of several channels, a main antenna radiating unit, and a power supply control unit, the power supply control unit is electrically connected to the active transceiver components to provide an electrical control signal to the active transceiver components; the main antenna radiating unit is connected to the active transceiver components to radiate the radio frequency signal sent by the active transceiver components.

[0021] The monitoring unit is nested and integrated in the array of the active sub-array, and adopts the same form as the main antenna radiation unit, collecting the RF signal of each active transceiver component of the active sub-array through electromagnetic coupling. The aperture of the active sub-array including the monitoring unit is distributed as a rectangular aperture, and the monitoring unit is embedded in the center of the active sub-array using a rectangular grid or a triangular grid.

[0022] The monitoring network is used to select different monitoring area signals according to the control. Specifically, the monitoring network includes a ring circuit, a fixed attenuator, a power division circuit and a single-way RF switch connected in sequence. The monitoring network is further configured to realize the RF link of the shared transceiver branch monitoring signal through the ring circuit. When monitoring the transmission channel, the receiver dynamic range corresponding to the monitoring signal is adapted through the attenuator; when monitoring the receiving channel, the monitoring unit is selected through the power division circuit and the single-way RF switch.

[0023] The device includes multiple active sub-arrays, and the multiple active sub-arrays realize distributed monitoring. The multi-channel monitoring signals obtained through the distributed monitoring are combined through the main antenna feeding network. That is, the main antenna feeding network is used to realize the power division and combination of the active sub-array radio frequency signals, divide the radio frequency excitation signal, or synthesize the radio frequency signals received by the active sub-arrays.

[0024] In this embodiment, there are three active sub-arrays, each of which contains 126 channels. The main antenna feeding network can realize the power division and combination of 378 signals. The active sub-array adopts a 16-channel tile-type TR component, operates at 8.5GHZ~9.5GHZ, has a saturated output of 29dBm, and a reception of -25dBm.

[0025] Each active sub-array integrates multiple monitoring units. The number and distribution of the monitoring units are determined by the number of active transceiver components of the active sub-array, the receiver's receiving sensitivity and the receiving dynamic range. The selection of the monitoring unit covering the monitoring area is based on the monitoring power being greater than the receiver sensitivity and the fluctuation range being less than the receiver dynamic range.

[0026] In this embodiment, according to the distribution of active sub-arrays, please refer to Figure 2 Two monitoring units are set in a 126-channel active subarray. The left monitoring unit is used to collect RF signals from the 55 channels on the left side of the dotted line and the channels in the elliptical area adjacent to the 8×8 array side. The right monitoring unit is used to collect RF signals from the 55 channels on the right side of the dotted line and the channels in the elliptical area adjacent to the 8×8 array side. The greater the coupling degree between the 8 channel signals around the monitoring unit and the monitoring signal, the easier it is to saturate the receiving branch during transmission monitoring. For the antenna array layout of the three active subarrays, please refer to Figure 6 .

[0027] according to Figure 2The monitoring unit covers the monitoring area, and the simulation model is established by simulation software HFSS. Please refer to Figure 3 , a 5×5 model should be established for coverage simulation, and the corresponding excitation port numbers are shown in the figure.

[0028] The coupling parameter S21 between the main antenna radiation unit and the monitoring unit at different positions can be calculated by simulation software, S21=10log10 (monitoring unit coupled receiving power / main antenna radiation unit power). The fluctuation range of the S21 value corresponding to different radiation positions should meet the receiver dynamic range requirements.

[0029] Please see Figure 4 When the monitoring unit is working, only the fluctuation characteristics of a single frequency point of 9GHz are considered. During simulation, the coupling range of the typical position is in the range of -46.5dB~-15.5dB (30dB), and the fluctuation is in the range of -46.5dB~-38dB (8.5dB) after removing the 8 channels around the monitoring unit; considering the correction time, the simulated fluctuation in the 8.5GHz~9.5GHz band is in the range of -47dB~-14.5dB (32.5dB), and the fluctuation is in the range of -47dB~-37.5dB (9.5dB) after removing the 8 channels around the monitoring unit; the dynamic fluctuation is within 10dB, which is basically no pressure on the receiver dynamics (-95dBm~-30dBm, 65dB), and can be used for the monitoring and calibration functions of active channels.

[0030] Figure 5 It is the measured coupling curve of the monitoring unit covering the monitoring area. When the monitoring unit is working, only the fluctuation characteristics of a single frequency point of 9GHz are considered. The measured S21 is in the range of -32dB~-14.5dB (17.5dB). After removing the 8 channels around the monitoring unit, the fluctuation is within -32dB~-30.5dB (1.5dB). Considering the correction time, the measured in-band fluctuation in the 8.5GHz~9.5GHz band is -44.7dB~-13dB (31.7dB). After removing the 8 channels around the monitoring unit, the fluctuation is within -44.7dB~-28dB (16.7dB). The dynamic fluctuation is within 17dB, which is basically stress-free for the receiver dynamics (-95dBm~-30dBm, 65dB), and can be used for the monitoring and calibration functions of active channels.

[0031] The monitoring network in this embodiment includes a ring circuit, a fixed attenuator, and a six-equal power division circuit, and each branch of the power division circuit is connected to a single-pole single-throw radio frequency switch. Figure 1 There are three active sub-arrays and six monitoring units. Each monitoring unit is connected to a single-pole single-throw RF switch. The monitoring network adopts RF switches, which can effectively avoid crosstalk between signals from different monitoring units.

[0032] This ring circuit is used to realize the sharing of the RF link of the receiving and sending branch monitoring signals in the monitoring network. Figure 7 The ring circuit is realized by a circulator, which consists of a magnetized ferrite sheet, a transmission line and an input and output connector. The circulator is a three-port device with a unidirectional transmission characteristic. The device realizes conduction from P1 to P2, from P2 to P3 and from P3 to P1. Conversely, the signal from P2 to P1, from P3 to P2 and from P1 to P3 is isolated.

[0033] In this embodiment, the P1 end of the circulator is connected to a fixed attenuator, the P2 end is connected to a receiver, and the P3 end is connected to an RF excitation. When monitoring the transmission channel, the RF excitation signal is divided by the main antenna feeding network, input into the active transceiver component for amplification, and then output to the corresponding main antenna radiation unit; the monitoring unit in the active subarray couples and receives the output signal of the main antenna radiation unit, and inputs it into the monitoring network. In the monitoring network, the signal is output from P1 to P2 of the circulator to the receiver for processing, combination and analysis.

[0034] When monitoring the receiving channel, a -20dB signal is coupled through a coupling circuit as a monitoring excitation signal and input into the monitoring network. In the monitoring network, the signal is output from P3 to P1 and radiated to the monitoring unit, thereby achieving the sharing of the RF link of the monitoring signal of the transceiver branch in the monitoring network.

[0035] During channel monitoring, the greater the coupling degree S21 value close to the monitoring unit, the easier it is for the power value entering the receiver to reach reception saturation. In order to prevent the monitoring signal from exceeding the reception saturation input requirement of the receiver, this embodiment sets an attenuator between the ring circuit and the power division circuit of the monitoring network. The attenuation value can be determined by comprehensively considering the coupling value of the monitoring excitation signal, the scale of the active subarray, and the sensitivity and dynamic range of the receiver. In this embodiment, through comprehensive consideration of the above factors, the attenuation value is positioned at 30dB.

[0036] Please see Figure 8 According to the insertion loss introduced by the devices at each level and the interconnected RF cables, when the -20dB monitoring excitation signal is coupled during reception monitoring, the signal entering the receiver when a -30dB fixed attenuator is added to the monitoring network is -84dBm~-75.5dBm; when a -30dB attenuator is added during transmission monitoring, the signal entering the receiver is -61.5dBm~-53dBm, which meets the dynamic requirements of the receiver.

[0037] The following describes the monitoring method of the monitoring device for the phased array antenna channel: When monitoring the transmission channel, each time the transmission channel of an active transceiver component in the active sub-array is opened, the RF excitation signal is input into the active transceiver component for amplification after being power-divided by the main antenna feeding network, and then output to the corresponding main antenna radiating unit; the monitoring unit in the active sub-array couples and receives the output signal of the main antenna radiating unit, inputs it into the monitoring network, and is output by the loop circuit of the monitoring network to the receiver for processing and combined analysis.

[0038] When monitoring the receiving channel, each time the receiving channel of an active transceiver component in the active sub-array is opened, a -20dB signal is coupled through a coupling circuit as a monitoring excitation signal and input into the monitoring network, which is then output from the monitoring network to the monitoring unit for radiation; the transceiver component of the active sub-array corresponding to the monitoring unit traverses and takes the output signal of the coupled receiving monitoring unit, which is input into the main antenna feeding network and then output to the receiver for processing and combination analysis.

[0039] In summary, in the monitoring device for the phased array antenna channel provided by this embodiment, the monitoring unit adopts the same form as the main antenna radiation unit, and collects the RF signal of each transceiver channel of the active sub-array through electromagnetic coupling; the monitoring network adopts a power division circuit plus an RF switch to realize the selection of the monitoring channel, each branch port of the power division circuit is connected to a single-pole single-throw switch, and a ring circuit is introduced to realize the control of the flow direction of the receiving and transmitting RF signals, thereby reducing the number of channels of the back-end processing equipment and the excitation source.

[0040] The monitoring method adopts passive monitoring units and nests them in active sub-arrays to solve the problem of high-density phased array antenna channel monitoring. At the same time, sub-array-level distributed monitoring is adopted, and multiple monitoring signals are combined by the monitoring network, which enhances the robustness and versatility of the monitoring method. When the array scale is expanded, only the monitoring network needs to be replaced, which solves the problem of large fluctuations in signals collected at different active channel positions by coupling. It has strong engineering feasibility, does not increase system complexity, and has low cost.

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A method for monitoring a phased array antenna channel, used in a monitoring device consisting of an active subarray, a main antenna feed network, a monitoring unit and a monitoring network; characterized in that: When monitoring the transmission channel, each time the transmission channel of an active transceiver component in the active sub-array is turned on, the RF excitation signal is input into the active transceiver component for amplification after being divided by the main antenna feeding network, and then output to the corresponding main antenna radiating unit; the monitoring unit in the active sub-array couples and receives the output signal of the main antenna radiating unit, inputs it into the monitoring network, and then outputs it to the receiver for processing and combination analysis; When monitoring the receiving channel, each time the receiving channel of one active transceiver component in the active sub-array is opened, a monitoring excitation signal is generated through a coupling circuit and input into the monitoring network, which is then output from the monitoring network to the monitoring unit for radiation; the transceiver component of the active sub-array corresponding to the monitoring unit traverses and extracts the output signal of the coupled receiving monitoring unit, which is then input into the main antenna feeding network and then output to the receiver for processing and combination analysis; Among them, the monitoring network shares the RF link of the transmitting and receiving branch monitoring signal. When monitoring the transmitting channel, the receiver dynamic range corresponding to the monitoring signal is adapted through the attenuator; when monitoring the receiving channel, the monitoring unit is selected through the power division circuit and the RF single-channel switch.

2. The method for monitoring a phased array antenna channel according to claim 1, characterized in that: According to the array distribution of the active sub-array, the coverage monitoring area of ​​the monitoring unit is determined, and the corresponding simulation model is established to calculate the coupling parameters between the main antenna radiation unit and the monitoring unit at different positions.

3. The method for monitoring a phased array antenna channel according to claim 2, characterized in that: When each active transceiver component in the coverage monitoring area of ​​the monitoring unit is traversed and opened, the corresponding minimum value of the radio frequency signal power is greater than the receiver sensitivity, and the power fluctuation range is smaller than the dynamic range of the receiver.

4. The method for monitoring a phased array antenna channel according to claim 1 or 2, characterized in that: Multiple passive monitoring units are integrated in the active sub-array, and the monitoring units are configured in the same form as the main antenna radiation unit to collect the radio frequency signal of each active transceiver component of the active sub-array through electromagnetic coupling.

5. The method for monitoring a phased array antenna channel according to claim 4, characterized in that: Distributed monitoring of multiple active sub-arrays is adopted, and the RF signals of multiple active sub-arrays are split or combined through the main antenna feeding network.

6. A monitoring device for a phased array antenna channel, characterized in that: include: Active sub-array, main antenna feed network, monitoring unit and monitoring network; The active sub-array includes active transceiver components of several channels, a main antenna radiation unit, and a power supply control unit. The power supply control unit is electrically connected to the active transceiver component to provide an electrical control signal to the active transceiver component. The main antenna radiation unit is connected to the active transceiver component to radiate the radio frequency signal sent by the active transceiver component. The monitoring unit is nested and integrated in the array plane of the active sub-array, adopts the same form as the main antenna radiation unit, and collects the radio frequency signal of each active transceiver component of the active sub-array through electromagnetic coupling; The main antenna feed network is configured to realize the combining and power splitting of the active sub-array radio frequency signals; The monitoring network is configured as a common transceiver branch monitoring signal radio frequency link. When monitoring the transmission channel, the receiver dynamic range corresponding to the monitoring signal is adapted through an attenuator; when monitoring the receiving channel, the monitoring unit is selected through a power division circuit and a radio frequency single-way switch.

7. The monitoring device for a phased array antenna channel according to claim 6, characterized in that: It comprises a plurality of active sub-arrays, wherein the plurality of active sub-arrays realize distributed monitoring, and a plurality of monitoring signals are combined through the main antenna feeding network.

8. The monitoring device for a phased array antenna channel according to claim 6, characterized in that: The active sub-array integrates a plurality of monitoring units, and the number of the monitoring units is determined by the number of active transceiver components of the active sub-array, the receiving sensitivity and the receiving dynamic range of the receiver.

9. The monitoring device for a phased array antenna channel according to claim 6, characterized in that: The monitoring network includes a ring circuit, a fixed attenuator, and a power division circuit connected in sequence, and each branch port of the power division circuit is connected to a single-pole single-throw radio frequency switch; The ring circuit is used to realize the sharing of the radio frequency link of the receiving and transmitting branch monitoring signals in the monitoring network; The fixed attenuator is used to adapt the dynamic range of the receiver corresponding to the monitoring signal to prevent the monitoring signal from exceeding the receiving saturation input requirement of the receiver; The power division circuit and the radio frequency switch are used to select the monitoring unit to avoid crosstalk between signals of different monitoring units.

10. The monitoring device for a phased array antenna channel according to claim 9, characterized in that: The ring circuit is a circulator, and the circulator includes a first port, a second port, and a third port, wherein the first port is connected to a fixed attenuator, the second port is connected to a receiver, and the third port is connected to a radio frequency excitation; When monitoring the transmission channel, the RF excitation signal is divided by the main antenna feeding network, input into the active transceiver component for amplification, and then output to the corresponding main antenna radiating unit; the monitoring unit in the active subarray couples and receives the output signal of the main antenna radiating unit, and inputs it into the monitoring network. In the monitoring network, the signal is output from the first port of the circulator to the second port to the receiver for processing and combination analysis; When monitoring the receiving channel, a -20dB signal is coupled through a coupling circuit as a monitoring excitation signal and input into the monitoring network. In the monitoring network, the signal is output from the third port to the first port and radiated out to the monitoring unit, thereby realizing the sharing of the RF link of the transceiver branch monitoring signal in the monitoring network.

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