S-band sub-array dual-polarization phased-array antenna system

Abstract

The invention discloses an S-band sub-array dual-polarization phased-array antenna system, and relates to the technical field of microwave antennae, and the disclosed S-band sub-array dual-polarization phased-array antenna system comprises dual-polarization antenna sub-arrays, each row of dual-polarization antenna sub-arrays comprises a plurality of dual-polarization antenna sub-arrays; each row of dual-polarized antenna sub-arrays is correspondingly connected with one intermediate frequency receiving and processing unit, and the number of the intermediate frequency receiving and processing units is the same as the number of rows of the dual-polarized antenna sub-arrays; the digital beam forming unit is connected with all the intermediate frequency receiving and processing units; wherein the dual-polarized antenna sub-array comprises a plurality of rows of antenna unit linear arrays and T / R transmit-receive assemblies correspondingly connected with the antenna unit linear arrays. Through the subarray architecture and the digital processing technology, the core problems that a traditional passive row feed system is large in loss and limited in detection capability are effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of microwave antennas, and particularly to an S-band sub-arrayed dual-polarized phased array antenna system. Background Art

[0002] Currently, large dual-polarized phased array antennas generally adopt passive traveling-wave feeding. That is, in the azimuth plane, a relatively long air-board line power distribution network is used. The antenna elements with the same polarization on each traveling-wave feed are interconnected with a pair of transceiver channels. During transmission, the radar digital beamforming subsystem controls the transmission channels to output high-power pulse signals, which are distributed to each antenna element through the air-board line and then radiated to the target airspace. During reception, the signals received by the antenna elements are synthesized through the air-board line network, input into the receiving channels, and then input into the digital beamforming subsystem for processing.

[0003] However, when a large antenna uses an air-board line power distribution network, the loss is relatively large, resulting in large power losses during transmission and reception, a decrease in antenna gain or an increase in the noise figure, making the antenna radiation ability relatively weak and reducing the detection ability of the radar. Summary of the Invention

[0004] The main purpose of this application is to provide an S-band sub-arrayed dual-polarized phased array antenna system, aiming to solve the technical problem of large power loss in passive traveling-wave feeding using air-board lines in related large dual-polarized phased array antennas.

[0005] To achieve the above purpose, this application proposes an S-band sub-arrayed dual-polarized phased array antenna system, including a traveling-wave feed module and a monitoring module connected to each other. The traveling-wave feed module includes:

[0006] A dual-polarized antenna sub-array array, where each row of the dual-polarized antenna sub-array array includes multiple dual-polarized antenna sub-arrays;

[0007] An intermediate-frequency receiving and processing unit, where each row of the dual-polarized antenna sub-arrays is correspondingly connected to an intermediate-frequency receiving and processing unit, and the number of intermediate-frequency receiving and processing units is the same as the number of rows of the dual-polarized antenna sub-array array;

[0008] A digital beamforming unit, connected to all intermediate-frequency receiving and processing units;

[0009] Among them, the dual-polarized antenna subarray consists of multiple rows of antenna element arrays and T / R transceiver components correspondingly connected to each antenna element array; the T / R transceiver components include at least one horizontally polarized signal transceiver component and at least one vertically polarized signal transceiver component. One end of a channel of the horizontally polarized signal transceiver component is correspondingly connected to the horizontal polarization interface of an antenna element array, and one end of a channel of the vertically polarized signal transceiver component is correspondingly connected to the vertical polarization interface of an antenna element array. The number of channels of the horizontally polarized signal transceiver component or the vertically polarized signal transceiver component is the same as the number of rows of the antenna element array.

[0010] In one embodiment, the antenna element array consists of multiple dual-polarized strip-line radiation elements, a first horizontal polarization power divider, and a first vertical polarization power divider; among them,

[0011] One end of the first horizontal polarization power divider serves as the horizontal polarization interface of the antenna element array and is connected to the horizontally polarized signal transceiver component. The other end ports of the first horizontal polarization power divider are correspondingly connected to each dual-polarized strip-line radiation element, and the number of ports at the other end of the first horizontal polarization power divider is the same as the number of dual-polarized strip-line radiation elements;

[0012] One end of the first vertical polarization power divider serves as the vertical polarization interface of the antenna element array and is connected to the vertically polarized signal transceiver component. The other end ports of the first vertical polarization power divider are correspondingly connected to each dual-polarized strip-line radiation element, and the number of ports at the other end of the first vertical polarization power divider is the same as the number of dual-polarized strip-line radiation elements.

[0013] In one embodiment, the intermediate-frequency receiving and processing unit includes:

[0014] Multiple second horizontal polarization power dividers. Each port at one end of the second horizontal polarization power divider is connected to the other end of the horizontally polarized signal transceiver component of a dual-polarized antenna subarray. Different ports are connected to different dual-polarized antenna subarrays in a row of the dual-polarized antenna subarray array. The number of second horizontal polarization power dividers is the same as the number of rows of antenna element arrays in a dual-polarized antenna subarray;

[0015] Multiple second vertical polarization power dividers. Each port at one end of the second vertical polarization power divider is connected to the other end of the vertically polarized signal transceiver component of a dual-polarized antenna subarray. Different ports are connected to different dual-polarized antenna subarrays in a row of the dual-polarized antenna subarray array; the number of second vertical polarization power dividers is the same as the number of rows of antenna element arrays in a dual-polarized antenna subarray;

[0016] A horizontally polarized frequency conversion component, one end of which is connected to the other end of the second horizontal polarization power divider;

[0017] The vertically polarized frequency conversion module, one end of the vertically polarized frequency conversion module is connected to the other end of the second vertically polarized power divider;

[0018] The horizontally polarized digital intermediate frequency receiver, one end of the horizontally polarized digital intermediate frequency receiver is connected to the other end of the horizontally polarized frequency conversion module, and the other end of the horizontally polarized digital intermediate frequency receiver is connected to the digital beamforming unit;

[0019] The vertically polarized digital intermediate frequency receiver, one end of the vertically polarized digital intermediate frequency receiver is connected to the other end of the vertically polarized frequency conversion module, and the other end of the vertically polarized digital intermediate frequency receiver is connected to the digital beamforming unit.

[0020] In one embodiment, in the transmitting signal link of the S-band sub-arrayed dual-polarized phased array antenna system, the digital beamforming unit is used to send the working parameters to the horizontally polarized digital intermediate frequency receiver and the vertically polarized digital intermediate frequency receiver;

[0021] The horizontally polarized digital intermediate frequency receiver is used to generate and output a horizontally polarized intermediate frequency excitation signal and a horizontally polarized control signal based on the working parameters, and the vertically polarized digital intermediate frequency receiver is used to generate and output a vertically polarized intermediate frequency excitation signal and a vertically polarized control signal based on the working parameters;

[0022] The horizontally polarized frequency conversion module is used to convert the horizontally polarized intermediate frequency excitation signal into a horizontally polarized radio frequency excitation signal based on the horizontally polarized control signal and output it, and the vertically polarized frequency conversion module is used to convert the vertically polarized intermediate frequency excitation signal into a vertically polarized radio frequency excitation signal based on the vertically polarized control signal and output it;

[0023] The second horizontally polarized power divider is used to forward the horizontally polarized radio frequency excitation signal to the horizontally polarized signal transceiver module, and the second vertically polarized power divider is used to forward the vertically polarized radio frequency excitation signal to the vertically polarized signal transceiver module;

[0024] The horizontally polarized signal transceiver module is used to amplify the horizontally polarized radio frequency excitation signal based on the horizontally polarized control signal and output it to the horizontal polarization interface of each antenna element linear array;

[0025] The vertically polarized signal transceiver module is used to amplify the vertically polarized radio frequency excitation signal based on the vertically polarized control signal and output it to the vertical polarization interface of each antenna element linear array.

[0026] In one embodiment, in the receiving signal link of the S-band sub-arrayed dual-polarized phased array antenna system, each antenna element linear array is used to output a horizontally polarized echo signal and a vertically polarized echo signal based on the acquired radio frequency echo signal;

[0027] The horizontal polarization signal transceiver assembly is used to filter and amplify the horizontal polarization echo signal and output it to the second horizontal polarization power divider, so that the second horizontal polarization power divider synthesizes and outputs the horizontal polarization echo signals output by each subarray. The vertical polarization signal transceiver assembly is used to filter and amplify the vertical polarization echo signal and output it to the second vertical polarization power divider, so that the second vertical polarization power divider synthesizes and outputs the vertical polarization echo signals output by each subarray;

[0028] The horizontal polarization frequency conversion assembly is used to convert the synthesized horizontal polarization echo signal into a horizontal polarization intermediate frequency echo signal and output it. The vertical polarization frequency conversion assembly is used to convert the synthesized vertical polarization echo signal into a vertical polarization intermediate frequency echo signal and output it;

[0029] The horizontal polarization digital intermediate frequency receiver is used to convert the horizontal polarization intermediate frequency echo signal into a horizontal polarization IQ signal and output it. The vertical polarization digital intermediate frequency receiver is used to convert the vertical polarization intermediate frequency echo signal into a vertical polarization IQ signal and output it, so that the digital beamforming unit performs weighting processing on the horizontal polarization IQ signal and the vertical polarization IQ signal.

[0030] In one embodiment, the second horizontal polarization power divider is used to synthesize and output the horizontal polarization echo signals output with the same channel number;

[0031] The second vertical polarization power divider is used to synthesize and output the vertical polarization echo signals output with the same channel number.

[0032] In one embodiment, the monitoring module includes a plurality of monitoring signal synthesis units and a signal monitoring unit; each monitoring signal synthesis unit is correspondingly connected to a dual-polarization antenna subarray;

[0033] Each monitoring signal synthesis unit includes a third horizontal polarization power divider and a third vertical polarization power divider;

[0034] One end of the third horizontal polarization power divider is connected to the horizontal polarization signal transceiver assembly through a horizontal polarization coupler, and the other end of the third horizontal polarization power divider is connected to the signal monitoring unit;

[0035] One end of the third vertical polarization power divider is connected to the vertical polarization signal transceiver assembly through a vertical polarization coupler; the other end of the third vertical polarization power divider is connected to the signal monitoring unit.

[0036] In one embodiment, the signal monitoring unit includes a first monitoring signal power divider, a switch calibration component, a monitoring signal transceiver assembly, a monitoring signal frequency conversion assembly, and a digital intermediate frequency receiver connected in sequence;

[0037] The digital intermediate frequency receiver is also connected to the digital beamforming unit;

[0038] The first monitoring signal power splitter is also connected to a plurality of second monitoring signal power splitters, and the number of the second monitoring signal power splitters is the same as the number of columns of the dual-polarized antenna sub-array;

[0039] The second monitoring signal power splitter is also connected to the monitoring signal combining unit.

[0040] In one embodiment, in the transmission channel monitoring link of the sub-arrayed dual-polarized phased array antenna system in the S-band, the horizontal polarization signal component is used to sequentially convert the horizontal polarization radio frequency excitation signals of each channel into horizontal polarization monitoring signals through the horizontal polarization coupler and output them through the third horizontal polarization power splitter;

[0041] The vertical polarization signal component is used to sequentially convert the vertical polarization radio frequency excitation signals of each channel into vertical polarization monitoring signals through the vertical polarization coupler and output them through the third vertical polarization power splitter;

[0042] The second monitoring signal power splitter is used to sequentially forward the horizontal polarization monitoring signal and the vertical polarization monitoring signal to the first monitoring signal power splitter, and the first monitoring signal power splitter is used to send the horizontal polarization monitoring signal and the vertical polarization monitoring signal to the switch calibration component and the monitoring signal transceiver component, and they are respectively output by the switch calibration component and the monitoring signal transceiver component;

[0043] The monitoring signal frequency conversion component and the digital intermediate frequency receiver are jointly used to convert the horizontal polarization monitoring signal and the vertical polarization monitoring signal into transmission channel monitoring IQ data and output them through the digital beamforming unit.

[0044] In one embodiment, in the receiving channel monitoring link of the sub-arrayed dual-polarized phased array antenna system in the S-band, the monitoring signal transceiver component is used to output the receiving channel monitoring signal, so that the row feeding module converts the receiving channel monitoring signal into receiving channel monitoring IQ data and outputs it.

[0045] One or more technical solutions proposed by this application have at least the following technical effects:

[0046] This application effectively solves the core problem of high loss and limited detection capability of traditional passive line feed system through subarray architecture and digital processing technology. This application adopts a hierarchical structure of antenna unit-antenna subarray-antenna array surface, divides the line feed into multiple sections, each section is equipped with T / R transceiver components, and pre-places the signal amplification link to the subarray unit, so that the feeder length between the T / R component and the antenna unit is significantly shortened, the RF transmission path is reduced, and the feeder loss is reduced. Through the coordination of the intermediate frequency receiving processing unit and the digital beamforming unit, the fully digital transmission excitation generation and receiving signal synthesis are realized. In the transmission link, the RF excitation signal is accurately distributed through the subarray-level power division network, and the receiving link adopts a two-level synthesis strategy (unit synthesis within the subarray + line feed-level subarray synthesis) to reduce the system noise coefficient. At the same time, the monitoring module collects the transmission / reception signals of each subarray in real time through the coupler, and realizes the online calibration of the channel amplitude and phase characteristics in combination with the switch calibration component, which improves the detection accuracy and reliability of the radar in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0049] Figure 1 This is a schematic diagram of module connections of the first embodiment of the S-band sub-array dual-polarization phased array antenna system of the present application.

[0050] Figure 2 Schematic diagram of the structural connection of the dual-polarization antenna subarray in the row feed module of the S-band subarray dual-polarization phased array antenna system in the first embodiment.

[0051] Figure 3 Schematic diagram of the connection between the signal transceiver component of the dual-polarized antenna subarray and the antenna unit linear array in the first embodiment.

[0052] Figure 4 Schematic diagram of the internal structure of the intermediate frequency receiving processing unit in the first embodiment

[0053] Figure 5 Schematic diagram of the connection of the monitoring module of the S-band sub-array dual-polarization phased array antenna system in the first embodiment.

[0054] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0056] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0057] The commonly used S-band dual-polarization phased array antenna system uses passive line feed, and the feeder network is a long air plate line. The signals of the same polarization of each line feed are synthesized through the network and interconnected with one channel of the T / R component. When transmitting, the digital T / R component outputs a high-power transmission signal, which is distributed to all the co-polarized antenna units of the line feed through the air plate line. The radiated signals are synthesized in space to form a transmission beam; when receiving, the signals received by the antenna unit are synthesized through the air plate line, input to the T / R component for analysis and processing, and output IQ data to the DBF module.

[0058] However, when large antennas use air plate line power distribution networks, the losses are large, resulting in large power losses during transmission and reception, reduced antenna gain or increased noise coefficient, making the antenna radiation capability relatively weak, thereby reducing the radar's detection capability.

[0059] The present application provides a solution, which adopts a hierarchical structure of antenna unit-antenna subarray-antenna array surface, divides the line feed into multiple sections, each section is equipped with a T / R transceiver component, and the signal amplification link is pre-placed to the subarray unit, so that the feeder length between the T / R component and the antenna unit is significantly shortened, the RF transmission path is reduced, and the feeder loss is reduced. Through the collaboration of the intermediate frequency receiving processing unit and the digital beamforming unit, fully digital transmission excitation generation and receiving signal synthesis are realized. In the transmitting link, the RF excitation signal is accurately distributed through the subarray-level power division network, and the receiving link adopts a two-stage synthesis strategy (unit synthesis within the subarray + line feed-level subarray synthesis), so that the system noise coefficient is reduced.

[0060] In addition, in this application, for each dual-polarized antenna subarray, each row of antenna unit linear arrays with the same polarization has only one transceiver channel, so the number of channels is small, the cost is low, and the channel phase matching workload between different dual-polarized antenna subarrays is small, and the maintainability is good. A row of amplitude weighting is achieved through a passive antenna unit linear array, and the weighting coefficient is closer to the theoretical curve, which can achieve ultra-low side lobes.

[0061] Based on this, the embodiment of the present application provides an S-band sub-array dual-polarization phased array antenna system, referring to Figure 1 , Figure 1 This is a schematic diagram of module connections of the first embodiment of the S-band sub-array dual-polarization phased array antenna system of the present application.

[0062] In this embodiment, the S-wave segment sub-arrayed dual-polarized phased array antenna system includes a row feeding module and a monitoring module that are connected to each other. The row feeding module includes:

[0063] A dual-polarized antenna sub-array array, where each row of the dual-polarized antenna sub-array array includes multiple dual-polarized antenna sub-arrays.

[0064] An intermediate-frequency receiving and processing unit. Each row of dual-polarized antenna sub-arrays is correspondingly connected to an intermediate-frequency receiving and processing unit, and the number of intermediate-frequency receiving and processing units is the same as the number of rows of the dual-polarized antenna sub-array array.

[0065] A digital beamforming unit, which is connected to all intermediate-frequency receiving and processing units.

[0066] Among them, the dual-polarized antenna sub-array consists of multiple rows of antenna element linear arrays and T / R transceiver components correspondingly connected to each antenna element linear array; the T / R transceiver component includes at least one horizontally polarized signal transceiver component and at least one vertically polarized signal transceiver component. One end of a channel of the horizontally polarized signal transceiver component is correspondingly connected to the horizontal polarization interface of an antenna element linear array, and one end of a channel of the vertically polarized signal transceiver component is correspondingly connected to the vertical polarization interface of an antenna element linear array. The number of channels of the horizontally polarized signal transceiver component or the vertically polarized signal transceiver component is the same as the number of rows of the antenna element linear array.

[0067] It should be noted that the dual-polarized antenna sub-array array adopts a hierarchical structure of antenna element - antenna sub-array - antenna array surface. Each antenna element linear array is composed of multiple dual-polarized strip-line radiation elements. Each dual-polarized antenna sub-array includes multiple rows of antenna element linear arrays. The dual-polarized antenna sub-array array includes multiple rows of dual-polarized antenna sub-arrays, and each row of dual-polarized antenna sub-arrays includes multiple dual-polarized antenna sub-arrays.

[0068] For the convenience of understanding, the following takes a dual-polarized antenna sub-array array composed of 24 dual-polarized antenna sub-arrays with 3 columns and 8 rows as an example for illustration. Among them, each dual-polarized antenna sub-array is composed of 16 rows of antenna element linear arrays, and each row of antenna element linear arrays is composed of 32 dual-polarized strip-line radiation elements. Figure 1 The connection relationship diagram of one row of dual-polarized antenna sub-arrays in the 3-column and 8-row dual-polarized antenna sub-array array is shown.

[0069] It should be noted that each row of the antenna element linear array has a horizontal polarization interface and a vertical polarization interface. One channel of the horizontal polarization signal transceiver component is connected to a horizontal polarization interface, and one channel of the vertical polarization signal transceiver component is connected to a vertical polarization interface. It can be understood that in one of the dual-polarization antenna sub-arrays of the above 3×8 dual-polarization antenna sub-array array, the horizontal polarization interfaces of the 16 rows of antenna element linear arrays are connected to the 16 channels of the horizontal polarization signal transceiver component in one-to-one correspondence, and the vertical polarization interfaces of the 16 rows of antenna element linear arrays are connected to the 16 channels of the vertical polarization signal transceiver component in one-to-one correspondence.

[0070] In a feasible implementation manner, the antenna element linear array is composed of a plurality of dual-polarization strip-line radiation units, a first horizontal polarization power divider, and a first vertical polarization power divider; among them,

[0071] One end of the first horizontal polarization power divider serves as the horizontal polarization interface of the antenna element linear array and is connected to the horizontal polarization signal transceiver component. The ports at the other end of the first horizontal polarization power divider are correspondingly connected to each dual-polarization strip-line radiation unit, and the number of ports at the other end of the first horizontal polarization power divider is the same as the number of dual-polarization strip-line radiation units.

[0072] One end of the first vertical polarization power divider serves as the vertical polarization interface of the antenna element linear array and is connected to the vertical polarization signal transceiver component. The ports at the other end of the first vertical polarization power divider are correspondingly connected to each dual-polarization strip-line radiation unit, and the number of ports at the other end of the first vertical polarization power divider is the same as the number of dual-polarization strip-line radiation units.

[0073] Specifically, both the first horizontal polarization power divider and the first vertical polarization power divider are a kind of unequal power dividers, and are implemented in the microstrip line mode. The antenna element linear array composed of 32 dual-polarization strip-line radiation units includes two one-to-thirty-two power dividers respectively used as the first horizontal polarization power divider and the first vertical polarization power divider. One end of them serves as the horizontal polarization interface (one end of the first horizontal polarization power divider) and the vertical polarization interface (one end of the first vertical polarization power divider) of the antenna element linear array, and the respective ports at the other end are respectively connected to the horizontal polarization ports (the other end of the first horizontal polarization power divider is connected to each horizontal polarization port) and the vertical polarization ports (the other end of the first vertical polarization power divider is connected to each vertical polarization port) of each dual-polarization strip-line radiation unit to realize the transmission of radio frequency signals.

[0074] Such as Figure 2 and Figure 3As shown in the figure, the dual-polarized antenna subarray composed of 16 rows of antenna element arrays includes 4 eight-channel T / R transceiver modules. Among them, two T / R transceiver modules are used as horizontal polarization signal transceiver modules and are connected to the horizontal polarization interfaces of each antenna element array, and the other two T / R transceiver modules are used as vertical polarization signal transceiver modules and are connected to the vertical polarization interfaces of each antenna element array.

[0075] Furthermore, the 3×8 dual-polarized antenna subarray array is correspondingly connected to 8 intermediate-frequency receiving and processing units. Specifically, three dual-polarized antenna subarrays in each row are connected to one intermediate-frequency receiving and processing unit, and the 8 intermediate-frequency receiving and processing units are also connected to one digital beamforming unit (DBF).

[0076] In a feasible implementation manner, the intermediate-frequency receiving and processing unit includes:

[0077] Multiple second horizontal polarization power dividers. Each port at one end of the second horizontal polarization power divider is connected to the other end of the horizontal polarization signal transceiver module of a dual-polarized antenna subarray. Different ports are connected to different dual-polarized antenna subarrays in a row of the dual-polarized antenna subarray array. The number of the second horizontal polarization power dividers is the same as the number of rows of antenna element arrays in a dual-polarized antenna subarray.

[0078] Multiple second vertical polarization power dividers. Each port at one end of the second vertical polarization power divider is connected to the other end of the vertical polarization signal transceiver module of a dual-polarized antenna subarray. Different ports are connected to different dual-polarized antenna subarrays in a row of the dual-polarized antenna subarray array. The number of the second vertical polarization power dividers is the same as the number of rows of antenna element arrays in a dual-polarized antenna subarray.

[0079] A horizontal polarization frequency conversion component, one end of which is connected to the other end of the second horizontal polarization power divider.

[0080] A vertical polarization frequency conversion component, one end of which is connected to the other end of the second vertical polarization power divider.

[0081] A horizontal polarization digital intermediate-frequency receiver, one end of which is connected to the other end of the horizontal polarization frequency conversion component, and the other end of which is connected to the digital beamforming unit.

[0082] A vertical polarization digital intermediate-frequency receiver, one end of which is connected to the other end of the vertical polarization frequency conversion component, and the other end of which is connected to the digital beamforming unit.

[0083] Specifically, each row of the 3×8 dual-polarized antenna sub-array, which consists of 3 dual-polarized antenna sub-arrays, corresponds to an intermediate-frequency receiving and processing unit. The intermediate-frequency receiving and processing unit contains 32 one-to-three power dividers, with 16 of them serving as the second horizontal polarization power dividers and the other 16 serving as the second vertical polarization power dividers.

[0084] It can be understood that, as Figure 4 shown, the 3 ports at one end of each second horizontal polarization power divider are respectively connected to the horizontal polarization signal transceiver components in the 3 dual-polarized antenna sub-arrays in one row of the dual-polarized antenna sub-array. Each port is connected to the channel of 1 horizontal polarization signal transceiver component, and the 3 ports are connected to 3 different dual-polarized antenna sub-arrays. Using 16 second horizontal polarization power dividers, all the channel connections with the horizontal polarization signal transceiver components in one row of 3 dual-polarized antenna sub-arrays can be completed. The connection method of the second vertical polarization power divider is similar to that of the second horizontal polarization power divider, and will not be elaborated here.

[0085] The intermediate-frequency receiving and processing unit also includes 4 eight-channel frequency conversion components, with 2 of them serving as horizontal polarization frequency conversion components and the other 2 serving as vertical polarization frequency conversion components. One channel of the horizontal polarization frequency conversion component is connected to one second horizontal polarization power divider, and one channel of the vertical polarization frequency conversion component is connected to one second vertical polarization power divider.

[0086] The intermediate-frequency receiving and processing unit also includes 4 eight-channel digital intermediate-frequency receivers, with 2 of them serving as horizontal polarization digital intermediate-frequency receivers and the other 2 serving as vertical polarization digital intermediate-frequency receivers. One end of each channel of the digital intermediate-frequency receivers is correspondingly connected to each channel of each frequency conversion component, and the other end is connected to the digital beamforming unit.

[0087] It can be understood that the row feeding module is used for transmitting and receiving radio frequency signals. In a feasible implementation manner, in the transmitting signal link of the S-band sub-arrayed dual-polarized phased array antenna system, the digital beamforming unit is used to send the working parameters to the horizontal polarization digital intermediate-frequency receiver and the vertical polarization digital intermediate-frequency receiver.

[0088] The horizontal polarization digital intermediate-frequency receiver is used to generate and output a horizontal polarization intermediate-frequency excitation signal and a horizontal polarization control signal based on the working parameters, and the vertical polarization digital intermediate-frequency receiver is used to generate and output a vertical polarization intermediate-frequency excitation signal and a vertical polarization control signal based on the working parameters.

[0089] The horizontal polarization frequency conversion component is used to convert the horizontal polarization intermediate-frequency excitation signal into a horizontal polarization radio frequency excitation signal and output it based on the horizontal polarization control signal, and the vertical polarization frequency conversion component is used to convert the vertical polarization intermediate-frequency excitation signal into a vertical polarization radio frequency excitation signal and output it based on the vertical polarization control signal.

[0090] The second horizontal polarization power divider is used to forward the horizontally polarized RF excitation signal to the horizontally polarized signal transceiver assembly, and the second vertical polarization power divider is used to forward the vertically polarized RF excitation signal to the vertically polarized signal transceiver assembly.

[0091] The horizontally polarized signal transceiver assembly is used to amplify the horizontally polarized RF excitation signal based on the horizontally polarized control signal and output it to the horizontal polarization interfaces of each antenna element array.

[0092] The vertically polarized signal transceiver assembly is used to amplify the vertically polarized RF excitation signal based on the vertically polarized control signal and output it to the vertical polarization interfaces of each antenna element array.

[0093] In the receiving signal link of the sub-arrayed dual-polarized phased array antenna system in the S-band, each antenna element array is used to output a horizontally polarized echo signal and a vertically polarized echo signal based on the acquired RF echo signal.

[0094] The horizontally polarized signal transceiver assembly is used to filter and amplify the horizontally polarized echo signal and output it to the second horizontal polarization power divider, so that the second horizontal polarization power divider synthesizes and outputs the horizontally polarized echo signals output by each sub-array. The vertically polarized signal transceiver assembly is used to filter and amplify the vertically polarized echo signal and output it to the second vertical polarization power divider, so that the second vertical polarization power divider synthesizes and outputs the vertically polarized echo signals output by each sub-array.

[0095] The horizontal polarization frequency conversion component is used to convert the synthesized horizontally polarized echo signal into a horizontally polarized intermediate frequency echo signal and output it. The vertical polarization frequency conversion component is used to convert the synthesized vertically polarized echo signal into a vertically polarized intermediate frequency echo signal and output it.

[0096] The horizontal polarization digital intermediate frequency receiver is used to convert the horizontally polarized intermediate frequency echo signal into a horizontally polarized IQ signal and output it. The vertical polarization digital intermediate frequency receiver is used to convert the vertically polarized intermediate frequency echo signal into a vertically polarized IQ signal and output it, so that the digital beamforming unit performs weighted processing on the horizontally polarized IQ signal and the vertically polarized IQ signal.

[0097] The second horizontal polarization power divider is used to synthesize and output the horizontally polarized echo signals output with the same channel number.

[0098] The second vertical polarization power divider is used to synthesize and output the vertically polarized echo signals output with the same channel number.

[0099] In a specific example, the signal transmission / reception process of each row of antenna element arrays in the dual-polarized antenna sub-array is as follows, and the signal processes of the remaining rows are similar:

[0100] When transmitting signals, the digital beamforming unit receives the operating parameters sent by other radar systems, and then sends the parameters to the intermediate-frequency receiving and processing unit through a multimode optical cable assembly. The intermediate-frequency receiving and processing unit generates a 150-MHz intermediate-frequency excitation signal and a control signal according to the parameters. The vertically polarized intermediate-frequency excitation signal is input into the vertically polarized frequency conversion module through a radio-frequency cable, and the horizontally polarized intermediate-frequency excitation signal is input into the horizontally polarized frequency conversion module through a radio-frequency cable. The control signal is input into the corresponding frequency conversion module and the T / R receiving module through a low-frequency cable. According to the control signal, the frequency conversion module up-converts the intermediate-frequency excitation signal to a radio-frequency signal through two frequency conversions, and then converts the radio-frequency signal into radio-frequency excitation signals for horizontal polarization and vertical polarization through amplification.

[0101] The radio-frequency excitation signal is divided into three paths by a one-to-three power divider and sent to the T / R modules of the dual-polarized antenna subarray 1, the T / R module of the dual-polarized antenna subarray 2, and the T / R module of the dual-polarized antenna subarray 3, respectively. As Figures 1 - 4 shown, the first channel of the horizontal polarization frequency conversion module 1 is divided into three paths through the second horizontal polarization power divider and sent to the first channel of the horizontal polarization signal transceiver module 1 of the dual-polarized antenna subarray 1, the first channel of the horizontal polarization signal transceiver module 1 of the dual-polarized antenna subarray 2, and the first channel of the horizontal polarization signal transceiver module 1 of the dual-polarized antenna subarray 3, respectively; the output of the first channel of the vertical polarization frequency conversion module 1 is divided into three paths through the second vertical polarization power divider and sent to the first channel of the vertical polarization signal transceiver module 1 of the dual-polarized antenna subarray 1, the first channel of the vertical polarization signal transceiver module 1 of the dual-polarized antenna subarray 2, and the first channel of the vertical polarization signal transceiver module 1 of the dual-polarized antenna subarray 3, respectively.

[0102] Each T / R module filters and amplifies the input radio-frequency excitation signal according to the control signal, outputs a high-power radio-frequency signal, and inputs it into the horizontal polarization interface or vertical polarization interface of the corresponding antenna element array through a feeder network. The horizontal polarization signal transceiver module 1 and the horizontal polarization signal transceiver module 2 jointly output 16 high-power radio-frequency signals, which are respectively input into the horizontal polarization interfaces of the 1st to 16th row antenna element arrays; the vertical polarization signal transceiver module 1 and the vertical polarization signal transceiver module 2 jointly output 16 high-power radio-frequency signals, which are respectively input into the vertical polarization interfaces of the 1st to 16th row antenna element arrays. The antenna element array distributes the high-power radio-frequency signal to 32 dual-polarized strip-line radiation units, and the radiation signals are synthesized in space to form a transmitting beam. During the above transmitting process, the digital beamforming unit can control the phase of the T / R module to realize the scanning, broadening, and other beam shaping of the transmitting beam.

[0103] When receiving signals, the dual-polarized strip-line radiation unit receives the radio-frequency echo signal, which is synthesized through a one-to-thirty-two power divider inside the antenna element array, and outputs a horizontally polarized echo signal and a vertically polarized echo signal, respectively.

[0104] The horizontally polarized echo signal and the vertically polarized echo signal are input into the corresponding T / R modules through the feeder network. The T / R modules filter and amplify the signals according to the control timing sequence and input them into a one-to-three power divider in the digital equipment box. The horizontally polarized echo signals of the antenna element linear array from row 1 to row 16 are input into the horizontally polarized signal transceiver module 1 and the horizontally polarized signal transceiver module 2, and the vertically polarized signals of the antenna element linear array from row 1 to row 16 are input into the vertically polarized signal transceiver module 1 and the vertically polarized signal transceiver module 2.

[0105] The one-to-three power divider of the intermediate frequency receiving and processing unit synthesizes the echo signals with the same T / R module number and the same channel number in the three antenna sub-arrays, and then inputs them into the frequency conversion module.

[0106] According to the control timing sequence, the frequency conversion module performs low-pass filtering, second-stage down-conversion, amplification, and low-noise amplification on the echo signals, and outputs 150 MHz intermediate frequency echo signals.

[0107] The digital intermediate frequency receiver samples the intermediate frequency echo signals, and then performs operations such as digital filtering, digital quadrature down-conversion, and pulse compression to generate IQ data, which is transmitted to the digital beamforming unit through the multimode optical cable module.

[0108] The digital beamforming unit receives the IQ data of 32 digital intermediate frequency receivers of the antenna sub-array, weights the IQ data according to the beam pointing coefficient, and generates IQ data with different pointings. These IQ data are output through the single-mode optical cable module and analyzed by other radar systems.

[0109] Further, referring to Figure 5 , Figure 2 shows a schematic diagram of the module connection of the monitoring module in this embodiment. As Figure 5 shown, the monitoring module includes a plurality of monitoring signal synthesis units and a signal monitoring unit; each monitoring signal synthesis unit is correspondingly connected to a dual-polarized antenna sub-array.

[0110] Each monitoring signal synthesis unit includes a third horizontally polarized power divider and a third vertically polarized power divider.

[0111] One end of the third horizontally polarized power divider is connected to the horizontally polarized signal transceiver module through a horizontally polarized coupler, and the other end of the third horizontally polarized power divider is connected to the signal monitoring unit.

[0112] One end of the third vertically polarized power divider is connected to the vertically polarized signal transceiver module through a vertically polarized coupler; the other end of the third vertically polarized power divider is connected to the signal monitoring unit.

[0113] The signal monitoring unit includes a first monitoring signal power divider, a switch calibration component, a monitoring signal transceiver component, a monitoring signal frequency conversion component, and a digital intermediate frequency receiver, which are connected in sequence;

[0114] The digital intermediate frequency receiver is also connected to the digital beamforming unit;

[0115] The first monitoring signal power divider is also connected to a plurality of second monitoring signal power dividers, and the number of second monitoring signal power dividers is the same as the number of columns of the dual-polarized antenna sub-array;

[0116] The second monitoring signal power divider is also connected to the monitoring signal combining unit.

[0117] Specifically, in a 3-column and 8-row dual-polarized antenna sub-array, there are 24 monitoring signal combining units. Each monitoring signal combining unit includes two one-to-sixteen power dividers, one of which serves as the third horizontal polarization power divider and the other serves as the third vertical polarization power divider. The 16 ports at one end of the third horizontal polarization power divider of each monitoring signal combining unit are respectively connected to the 16 channels of the horizontal polarization signal transceiver component of a dual-polarized antenna sub-array through couplers one by one. The 16 ports at one end of the third vertical polarization power divider of each monitoring signal combining unit are respectively connected to the 16 channels of the vertical polarization signal transceiver component of a dual-polarized antenna sub-array through couplers one by one.

[0118] The signal monitoring unit includes 3 one-to-sixteen power dividers (serving as the second monitoring signal power dividers), and a one-to-three power divider (serving as the first monitoring signal power divider), a switch calibration component, a monitoring signal transceiver component, a monitoring signal frequency conversion component, and a digital intermediate frequency receiver, which are connected in sequence.

[0119] It can be understood that each monitoring signal combining unit corresponds to and is connected to 1 dual-polarized antenna sub-array. For a 3-column and 8-row dual-polarized antenna sub-array, 3 columns and 8 rows of monitoring signal combining units need to be configured. In this embodiment, the 16 ports at one end of each second monitoring signal power divider are respectively connected to the third vertical polarization power divider and the third horizontal polarization power divider of 8 monitoring signal combining units in one column.

[0120] The other ends of the 3 second monitoring signal power dividers are respectively connected to 3 ports at one end of the first monitoring signal power divider, and the other end of the first monitoring signal power divider is connected to the switch calibration component.

[0121] Furthermore, the monitoring module is used to master and calibrate the amplitude and phase characteristics of each transceiver channel of the phased array antenna system, and can be divided into transmit channel monitoring and receive channel monitoring.

[0122] In a feasible implementation, in the transmission channel monitoring section of the S-band sub-arrayed dual-polarization phased array antenna system, the horizontal polarization signal component is used to sequentially convert the horizontal polarization RF excitation signals of each channel into horizontal polarization monitoring signals through a horizontal polarization coupler and output them through a third horizontal polarization power divider.

[0123] The vertical polarization signal component is used to sequentially convert the vertical polarization RF excitation signals of each channel into vertical polarization monitoring signals through a vertical polarization coupler and output them through a third vertical polarization power divider.

[0124] The second monitoring signal power divider is used to sequentially forward the horizontal polarization monitoring signal and the vertical polarization monitoring signal to the first monitoring signal power divider. The first monitoring signal power divider is used to send the horizontal polarization monitoring signal and the vertical polarization monitoring signal to the switch calibration component and the monitoring signal transceiver component, and they are respectively output by the switch calibration component and the monitoring signal transceiver component.

[0125] The monitoring signal frequency conversion component and the digital intermediate frequency receiver are jointly used to convert the horizontal polarization monitoring signal and the vertical polarization monitoring signal into transmission channel monitoring IQ data and output them through the digital beamforming unit.

[0126] In the receiving channel monitoring section of the S-band sub-arrayed dual-polarization phased array antenna system, the monitoring signal transceiver component is used to output the receiving channel monitoring signal, so that the row feeding module converts the receiving channel monitoring signal into receiving channel monitoring IQ data and outputs it.

[0127] In a specific example, the signal flow of the transmission channel monitoring is as follows:

[0128] The digital intermediate frequency receiver, the monitoring signal frequency conversion component, and the monitoring signal component of the signal monitoring unit are all in the receiving state, and the switch calibration component selects the in-machine signal. The first channel of the horizontal polarization signal transceiver component 1 of the dual-polarization antenna sub-array 1 is in the transmission state, and the remaining channels of this component and other components are closed. The first channel of the horizontal polarization signal transceiver component 1 outputs a high-power RF signal according to the control signal. This signal generates a transmission monitoring signal, the horizontal polarization monitoring signal, through the coupler of the feeder network, and is input into the third horizontal polarization power divider of the monitoring signal synthesis unit through a RF cable. This power divider then outputs the signal. The horizontal polarization monitoring signal is input into the corresponding second monitoring signal power divider of the signal monitoring unit through a RF cable, and then input into the first monitoring signal power divider through a RF cable. It is output by the first monitoring signal power divider and sent into the switch calibration component, and finally input into the monitoring signal transceiver component.

[0129] The signal monitoring unit's monitoring signal transceiver assembly, detection signal frequency conversion assembly, and digital intermediate frequency receiver process and analyze the horizontally polarized monitoring signal to generate IQ data, which is output to the digital beamforming unit through a multimode optical cable assembly. The digital beamforming unit outputs the IQ data through a single-mode optical cable assembly, and other radar systems calculate the amplitude and phase of the first channel of the horizontally polarized signal transceiver assembly 1.

[0130] The monitoring methods of the dual-polarized antenna subarray 2 and the dual-polarized antenna subarray 3 are the same as the above method, and will not be elaborated here.

[0131] After completing the monitoring of the three horizontally polarized transmission channels of the first-row antenna element linear array of the three dual-polarized antenna subarrays, change the numbers and channels of the horizontally polarized signal transceiver assembly to complete the monitoring of the remaining 127 rows of horizontally polarized and 128 rows of vertically polarized transmission channels.

[0132] The signal flow of the receiving channel monitoring is as follows:

[0133] The digital intermediate frequency receiver, monitoring signal frequency conversion assembly, and monitoring signal transceiver assembly of the monitoring extension are all in the transmitting state, and the switch calibration assembly selects the in-machine signal.

[0134] All T / R transceiver assemblies in the dual-polarized antenna subarray 1 are in the receiving state, and all T / R assemblies in the antenna subarrays of the dual-polarized antenna subarray 2 and the dual-polarized antenna subarray 3 are turned off.

[0135] The monitoring signal transceiver assembly of the signal monitoring unit outputs a high-power radio frequency signal, which is input to the third vertical polarization power divider and the third horizontal polarization power divider through the first monitoring signal power divider and the second monitoring signal power divider in sequence.

[0136] The third vertical polarization power divider and the third horizontal polarization power divider distribute the signal to all couplers, and the couplers generate received monitoring signals, which are input to the corresponding T / R transceiver assemblies for amplification and filtering.

[0137] The received monitoring signals with the same T / R component number and the same channel number in the three dual-polarized antenna subarrays are synthesized through a one-to-three power divider, and then the received monitoring signal sampling is completed through other components of the intermediate frequency receiving processing unit, and IQ data is output.

[0138] The digital beamforming unit receives the IQ data of the 32 intermediate frequency receiving processing units of the antenna subarray, and outputs the IQ data through a single-mode optical cable assembly. Other radar systems calculate the amplitude and phase of all receiving channels of the left antenna subarray.

[0139] All T / R transceiver components in the dual-polarized antenna subarray 2 are in the receiving state; all T / R components in the left and right antenna subarrays are turned off. Monitor all receiving channels of the middle antenna subarray.

[0140] All T / R transceiver components in the dual-polarized antenna subarray 3 are in the receiving state; all T / R transceiver components in the left and middle antenna subarrays are turned off. Monitor all receiving channels of the right antenna subarray.

[0141] In the above monitoring process, the switch calibration component can also be used to select the signals of external instruments, and the monitoring process is similar to the above steps.

[0142] In this embodiment, through the design of the row feeding module and the monitoring module, in terms of row feeding, the row feeding is divided into three segments, and each segment has T / R transceiver components. The feeder length between the T / R transceiver components and the antenna unit is reduced, and at the same time, the number of stages of the power divider is reduced, reducing the feeder loss. In terms of monitoring, the coupler is installed on the feeder. Generally, the feeder will not change after the antenna system is installed, so the accuracy of the monitoring signal is relatively high. Secondly, there are only 3 transceiver channels for the signal processing of the same polarization in each row, so the number of channels is small and the cost is low. Only 3 channels in one row need to be strictly phase-matched. When the transceiver components are accidentally damaged, the workload of re-phase matching is small and the maintainability is good.

[0143] In addition, the amplitude weighting of one row is mainly realized by the passive antenna unit linear array, and the weighting coefficient is closer to the theoretical curve, and ultra-low sidelobes can be achieved.

[0144] In summary, through the subarray architecture and digital processing technology, this application effectively solves the core problems of large loss and limited detection ability of traditional passive row feeding systems. This application adopts a hierarchical structure of antenna unit - antenna subarray - antenna array surface, divides the row feeding into multiple segments, and each segment is configured with T / R transceiver components, and advances the signal amplification link to the subarray unit, so that the feeder length between the T / R components and the antenna unit is significantly shortened, reducing the radio frequency transmission path and reducing the feeder loss. Through the cooperation of the intermediate frequency receiving processing unit and the digital beamforming unit, the fully digital generation of transmit excitation and the synthesis of received signals are realized. In the transmit link, the radio frequency excitation signal is accurately distributed through the subarray-level power distribution network, and in the receive link, a two-stage synthesis strategy (synthesis within the subarray unit + synthesis of subarrays at the row feeding level) is adopted, reducing the system noise coefficient. At the same time, the monitoring module collects the transmit / receive signals of each subarray in real time through the coupler, and combines the switch calibration component to realize the online calibration of the amplitude-phase characteristics of the channels, improving the detection accuracy and reliability of the radar in complex environments.

[0145] The above are only some embodiments of the present application, and thus do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. An S-band sub-array dual-polarization phased array antenna system, characterized in that: The S-band sub-array dual-polarization phased array antenna system comprises a line feed module and a monitoring module connected to each other, wherein the line feed module comprises: A dual-polarized antenna subarray array, each row of the dual-polarized antenna subarray array comprising a plurality of dual-polarized antenna subarrays; An intermediate frequency receiving processing unit, each row of the dual-polarized antenna subarray is correspondingly connected to one intermediate frequency receiving processing unit, and the number of the intermediate frequency receiving processing units is the same as the number of rows of the dual-polarized antenna subarray array; A digital beam forming unit connected to all the intermediate frequency receiving and processing units; Among them, the dual-polarized antenna subarray includes multiple rows of antenna unit linear arrays and T / R transceiver components correspondingly connected to each of the antenna unit linear arrays; the T / R transceiver components include at least one horizontally polarized signal transceiver component and at least one vertically polarized signal transceiver component, one end of a channel of the horizontally polarized signal transceiver component is correspondingly connected to a horizontal polarization interface of one of the antenna unit linear arrays, and one end of a channel of the vertically polarized signal transceiver component is correspondingly connected to a vertical polarization interface of one of the antenna unit linear arrays, and the number of channels of the horizontally polarized signal transceiver component or the vertically polarized signal transceiver component is the same as the number of rows of the antenna unit linear array.

2. The S-band sub-array dual-polarization phased array antenna system according to claim 1, characterized in that: The antenna unit linear array is composed of a plurality of dual-polarized stripline radiating units, a first horizontal polarization power divider and a first vertical polarization power divider; wherein, One end of the first horizontally polarized power divider is connected to the horizontally polarized signal transceiver component as a horizontally polarized interface of the antenna unit linear array, and the port at the other end of the first horizontally polarized power divider is correspondingly connected to each of the dual-polarized stripline radiating units, and the number of the ports at the other end of the first horizontally polarized power divider is consistent with the number of the dual-polarized stripline radiating units; One end of the first vertical polarization power divider is connected to the vertical polarization signal transceiver component as the vertical polarization interface of the antenna unit linear array, and the port at the other end of the first vertical polarization power divider is correspondingly connected to each of the dual-polarization stripline radiating units, and the number of ports at the other end of the first water vertical polarization power divider is consistent with the number of the dual-polarization stripline radiating units.

3. The S-band sub-array dual-polarization phased array antenna system according to claim 2, characterized in that: The intermediate frequency receiving processing unit comprises: a plurality of second horizontal polarization power dividers, wherein each port at one end of the second horizontal polarization power divider is connected to the other end of a horizontal polarization signal transceiver component of a dual-polarization antenna subarray, different ports are connected to different dual-polarization antenna subarrays in a row of the dual-polarization antenna subarray array, and the number of the second horizontal polarization power dividers is the same as the number of antenna unit linear array rows in one of the dual-polarization antenna subarrays; A plurality of second vertical polarization power dividers, each port at one end of the second vertical polarization power divider is connected to the other end of a vertical polarization signal transceiver component of a dual-polarization antenna subarray, and different ports are connected to different dual-polarization antenna subarrays in a row of the dual-polarization antenna subarray array; the number of the second vertical polarization power dividers is the same as the number of antenna unit linear array rows in one of the dual-polarization antenna subarrays; A horizontally polarized frequency conversion component, one end of which is connected to the other end of the second horizontally polarized power divider; A vertical polarization frequency conversion component, one end of which is connected to the other end of the second vertical polarization power divider; A horizontally polarized digital intermediate frequency receiver, one end of which is connected to the other end of the horizontally polarized frequency conversion component, and the other end of which is connected to the digital beam forming unit; A vertically polarized digital intermediate frequency receiver, one end of which is connected to the other end of the vertically polarized frequency conversion component, and the other end of which is connected to the digital beam forming unit.

4. The S-band sub-array dual-polarization phased array antenna system according to claim 3, characterized in that: In the signal transmission link of the S-band sub-array dual-polarization phased array antenna system, the digital beamforming unit is used to send working parameters to the horizontally polarized digital intermediate frequency receiver and the vertically polarized digital intermediate frequency receiver; The horizontally polarized digital intermediate frequency receiver is used to generate and output a horizontally polarized intermediate frequency excitation signal and a horizontally polarized control signal based on the operating parameters, and the vertically polarized digital intermediate frequency receiver is used to generate and output a vertically polarized intermediate frequency excitation signal and a vertically polarized control signal based on the operating parameters; The horizontal polarization frequency conversion component is used to convert the horizontal polarization intermediate frequency excitation signal into a horizontal polarization radio frequency excitation signal based on the horizontal polarization control signal and output it, and the vertical polarization frequency conversion component is used to convert the vertical polarization intermediate frequency excitation signal into a vertical polarization radio frequency excitation signal based on the vertical polarization control signal and output it; The second horizontally polarized power splitter is used to forward the horizontally polarized radio frequency excitation signal to the horizontally polarized signal transceiver component, and the second vertically polarized power splitter is used to forward the vertically polarized radio frequency excitation signal to the vertically polarized signal transceiver component; The horizontal polarization signal transceiver component is used to amplify the horizontal polarization radio frequency excitation signal based on the horizontal polarization control signal and output it to the horizontal polarization interface of each antenna unit linear array; The vertical polarization signal transceiver component is used to amplify the vertical polarization radio frequency excitation signal based on the vertical polarization control signal and output it to the vertical polarization interface of each antenna unit linear array.

5. The S-band sub-array dual-polarization phased array antenna system according to claim 3, characterized in that: In the signal receiving link of the S-band sub-array dual-polarization phased array antenna system, each of the antenna unit linear arrays is used to output a horizontal polarization echo signal and a vertical polarization echo signal based on the acquired radio frequency echo signal; The horizontal polarization signal transceiver component is used to filter and amplify the horizontal polarization echo signal and then output it to the second horizontal polarization power divider, so that the second horizontal polarization power divider synthesizes and outputs the horizontal polarization echo signal output by each subarray; the vertical polarization signal transceiver component is used to filter and amplify the vertical polarization echo signal and then output it to the second vertical polarization power divider, so that the second vertical polarization power divider synthesizes and outputs the vertical polarization echo signal output by each subarray; The horizontal polarization frequency conversion component is used to convert the synthesized horizontal polarization echo signal into a horizontal polarization intermediate frequency echo signal and output it, and the vertical polarization frequency conversion component is used to convert the synthesized vertical polarization echo signal into a vertical polarization intermediate frequency echo signal and output it; The horizontally polarized digital intermediate frequency receiver is used to convert the horizontally polarized intermediate frequency echo signal into a horizontally polarized IQ signal and output it, and the vertically polarized digital intermediate frequency receiver is used to convert the vertically polarized intermediate frequency echo signal into a vertically polarized IQ signal and output it, so that the digital beamforming unit performs weighted processing on the horizontally polarized IQ signal and the vertically polarized IQ signal.

6. The S-band sub-array dual-polarization phased array antenna system according to claim 5, characterized in that: The second horizontal polarization power divider is used to synthesize and output the horizontal polarization echo signals output with the same channel number; The second vertical polarization power divider is used to synthesize and output the vertical polarization echo signals output with the same channel number.

7. The S-band sub-array dual-polarization phased array antenna system according to claim 3, characterized in that: The monitoring module includes a plurality of monitoring signal synthesis units and a signal monitoring unit; each of the monitoring signal synthesis units is connected to a corresponding dual-polarization antenna subarray; Each of the monitoring signal synthesis units includes a third horizontal polarization power divider and a third vertical polarization power divider; One end of the third horizontal polarization power divider is connected to the horizontal polarization signal transceiver component through a horizontal polarization coupler, and the other end of the third horizontal polarization power divider is connected to the signal monitoring unit; One end of the third vertical polarization power divider is connected to the vertical polarization signal transceiver component through a vertical polarization coupler; the other end of the third vertical polarization power divider is connected to the signal monitoring unit.

8. The S-band sub-array dual-polarization phased array antenna system according to claim 7, characterized in that: The signal monitoring unit comprises a first monitoring signal power divider, a switch calibration component, a monitoring signal transceiver component, a monitoring signal frequency conversion component and a digital intermediate frequency receiver connected in sequence; The digital intermediate frequency receiver is also connected to the digital beam forming unit; The first monitoring signal power divider is also connected to a plurality of second monitoring signal power dividers, and the number of the second monitoring signal power dividers is the same as the number of columns of the dual-polarization antenna subarray array; The second monitoring signal power divider is also connected to the monitoring signal synthesis unit.

9. The S-band sub-array dual-polarization phased array antenna system according to claim 8, characterized in that: In the transmission channel monitoring link of the S-band sub-array dual-polarization phased array antenna system, the horizontal polarization signal component is used to sequentially convert the horizontal polarization RF excitation signal of each channel through the horizontal polarization coupler into a horizontal polarization monitoring signal and output it through the third horizontal polarization power divider; The vertical polarization signal component is used for converting the vertical polarization RF excitation signal of each channel into a vertical polarization monitoring signal through the vertical polarization coupler in sequence and outputting it through the third vertical polarization power divider; The second monitoring signal power divider is used to sequentially forward the horizontal polarization monitoring signal and the vertical polarization monitoring signal to the first monitoring signal power divider, and the first monitoring signal power divider is used to send the horizontal polarization monitoring signal and the vertical polarization monitoring signal to the switch calibration component and the monitoring signal transceiver component, and the switch calibration component and the monitoring signal transceiver component output them respectively; The monitoring signal frequency conversion component and the digital intermediate frequency receiver are used together to convert the horizontal polarization monitoring signal and the vertical polarization monitoring signal into transmission channel monitoring IQ data and output them through the digital beamforming unit.

10. The S-band sub-array dual-polarization phased array antenna system according to claim 8, characterized in that: In the receiving channel monitoring link of the S-band sub-array dual-polarization phased array antenna system, the monitoring signal transceiver component is used to output a receiving channel monitoring signal, so that the line feed module converts the receiving channel monitoring signal into receiving channel monitoring IQ data and outputs it.

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