Wave control system and method applied to satellite-borne phased array radar antenna array plane

Abstract

The invention belongs to the technical field of radar beam control, and discloses a beam control system and method applied to a satellite-borne phased array radar antenna array plane. A hierarchical control architecture is adopted, computing resources are reasonably distributed, the beam conversion time is shortened, and universality is achieved; according to the invention, a main and standby circuit cross hot backup, series connection and parallel connection combined form is adopted at a sub-array wave control unit level, so that the number of output signals of a wave control extension set is reduced, and the system cost is reduced; component-level temperature amplitude phase compensation can be achieved, the component wave control chip collects temperature in real time and sends the temperature to the wave control unit through a BIT channel, and the wave control unit completes calculation compensation; according to the invention, subarray-level deformation phase compensation can be realized, and the wave control unit realizes deformation phase compensation at the subarray level according to the subarray deformation quantity measured by the deformation measurement system.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of radar beam control, and particularly to a wave control system and method applied to the antenna array surface of a spaceborne phased array radar. Background Art

[0002] Radar beam control technology is the core of a phased array radar system, and its performance directly affects beam scanning speed, pointing accuracy, anti-jamming ability, and system reliability. With the increasingly complex electronic warfare environment, modern radar systems have put forward higher requirements for the real-time performance, flexibility, and reliability of beam control.

[0003] Early mechanical scanning radars used rotating antennas to achieve beam scanning, but had problems such as large inertia and slow response (millisecond level). Currently, domestic and foreign research in the field of beam control mainly focuses on distributed wave control architectures, digital beam forming (DBF), intelligent adaptive beam regulation, etc., but there are still several technical bottlenecks. For example, the academic paper "Design and Research of a Wave Control System for a Large Spaceborne Phased Array Radar" proposes a design scheme for a large wave control system with a distributed architecture, using a three-level wave control scheme, namely, a top-level wave control located in the satellite cabin, a secondary wave control located on the array surface, and a final-level wave control located inside the T / R component. The wave control units of this system are connected in parallel with the wave control sub-machines, requiring a large number of output interfaces for the wave control sub-machines and having low reliability.

[0004] The existing patent "A Beam Control Device for a Spaceborne Large Phased Array Antenna" proposes a beam control device for a spaceborne phased array antenna. This device uses the traditional phased array antenna beam control method and a three-level wave control scheme, but does not have the function of temperature monitoring at the TR component level and is difficult to apply to complex usage environments. Summary of the Invention

[0005] Traditional wave control systems use a parallel connection method. In this method, as the number of wave control units increases, the wave control sub-machines need to increase corresponding interfaces and do not have universality; traditional spaceborne radar antenna arrays work in space. Due to different solar irradiation angles, there are large differences in the temperatures of different regions of the antenna array surface. The increase in temperature will cause structural deformation of the array surface, thereby reducing the phase synthesis efficiency between channels; each active channel of the traditional TR component will introduce non-linear amplitude-phase errors with temperature changes. In view of the above problems, the present invention provides a system and method applied to the antenna array surface of a spaceborne phased array radar, aiming to improve the connection method of the wave control system and enhance universality; aiming to eliminate phase errors caused by structural deformation through a real-time deformation phase compensation method; aiming to eliminate non-linear errors caused by temperature changes through a real-time temperature compensation method.

[0006] To achieve the above object, the present invention provides a wave control system applied to the antenna array surface of a spaceborne phased array radar, which includes a main control computer, a wave control sub - computer, a number of wave control units, and a number of active sub - arrays; The wave control sub - computer is located outside the antenna array surface, connected to the main control computer at one end and to the wave control units at the other end; The wave control units are located inside the antenna array surface. One end of the wave control unit is connected to the wave control sub - computer, and the other end is connected to a number of active sub - arrays. The number of wave control units is divided into columns and connected in parallel. Inside the column, they are cascaded through cables. The input end of the first wave control unit is connected to the wave control sub - computer, and the output end of the first wave control unit is connected to the input ends of other wave control units in the column; The wave control unit includes a main - standby RS422 input interface circuit, an RS422 output interface circuit, a main control ASIC chip, a FLASH memory chip, a TTL input / output interface circuit, and a cascaded RS422 output interface circuit; The main - standby RS422 input interface circuit is used to receive the control instructions output by the wave control sub - computer. The main - standby RS422 input interface circuit includes a main - path RS422 input interface and a standby - path RS422 input interface. The signal states of the main - path and standby - path are verified inside the wave control unit. When the main - path verification is incorrect, it switches to receiving the standby - path instructions; The RS422 output interface circuit is used to output the BIT information of the wave control unit to the wave control sub - computer. The BIT information includes the voltage and temperature of the wave control unit itself, as well as the temperature and voltage of the TR components and sub - array delay components inside the active sub - array; The functions of the main control ASIC chip include instruction reception, data management, wave control calculation, data transmission, and digital power control. According to the instructions received by the main - standby RS422 input interface circuit, the original amplitude - phase control codes of all channels in the connected active sub - array are calculated and output to the TTL output interface circuit in SPI protocol. At the same time, the main control ASIC chip can also receive the temperature data returned by the TR components and sub - array delay components inside the active sub - array; The FLASH memory chip is connected to the main control ASIC chip and is used to store the relevant parameters required for the calculation of the main control ASIC chip and the correspondence table between temperature and amplitude - phase compensation amount; One end of the TTL output interface circuit is connected to the main control ASIC chip, and the other end is connected to the components of the active sub - array. It is used to drive the amplitude - phase control codes output by the main control ASIC chip and then output them to the TR components and sub - array delay components inside the active sub - array for reception; One end of the TTL input interface circuit is connected to the main control ASIC chip, and the other end is connected to the active sub - array. It drives the temperature data output by the TR components and sub - array delay components inside the active sub - array and then inputs them to the main control ASIC chip; One end of the cascaded RS422 output interface circuit is connected to the main control ASIC chip, and the other end is connected to the primary and standby RS422 input interfaces of the subsequent wave control unit.

[0007] Furthermore, the wave control extension includes a beam operation module and a signal drive module; The wave control operation module generates information including scanning angle, frequency point, and weighting code according to the system task, and sends it to each wave control unit according to the agreed protocol; at the same time, it receives the sub-array shape variables sent by the main control computer and sends them to the wave control units corresponding to each active sub-array. The signal drive module drives and distributes the signals output by the wave control extension and divides them into N groups for output. Each group of signals is connected to several wave control units.

[0008] Furthermore, each wave control unit is connected to 2 active sub-arrays.

[0009] Furthermore, each active sub-array includes 64 TR components, and the TR components are installed on the active sub-array.

[0010] Furthermore, the TR component also includes a component wave control chip, which is located inside the TR component; The component wave control chip is used to receive the wave control code output by the wave control unit. The wave control code includes amplitude, phase, and switch control information. After parsing the wave control code, it performs corresponding control on the phase shifter, attenuator, and single-pole double-throw switch to achieve array surface beam control; The component wave control chip integrates the ADC function, can collect the voltage of the thermistor installed inside the component, obtain the digital quantity of the temperature, and send the temperature acquisition data to the wave control unit through the TTL input interface circuit connected to the wave control unit.

[0011] Furthermore, the wave control unit also includes a digital power supply, which receives the power control signal of the main control ASIC chip, controls the output or shutdown of the voltage, and realizes the power supply to other circuits inside the wave control unit and the equipment inside the active sub-array.

[0012] The present invention also provides a wave control method applied to the array surface of a spaceborne phased array radar antenna. Using the system of claims 1-6, the wave control method includes a component-level temperature amplitude-phase compensation method and a sub-array-level deformation phase compensation method. The component-level temperature amplitude-phase compensation method includes the following steps: Step 1: The wave control extension receives the power-on instruction of the TR component sent by the main control computer through the RS422 interface, and sends the power-on instruction to the full-array wave control unit. After receiving it, the wave control unit performs the power-on action on the TR component; Step 2: The wave control extension receives the TR component initialization instruction sent by the main control computer through the RS422 interface, and sends the TR component initialization instruction to the wave control unit. After receiving it, the wave control extension sequentially sends the initialization instruction to the TR component. The initialization instruction includes reset, unlock, over-duty-cycle protection, and enable temperature telemetry initialization instructions; Step 3: The wave control extension receives the system task instruction sent by the main control computer through the RS422 interface. After generating the angle information according to the system task, it sends the beam information including scan angle, frequency point, broadening coefficient, and temperature compensation enable control to the wave control unit; Step 4: After receiving the beam information sent by the wave control extension through the RS422 interface, the wave control unit calculates the amplitude-phase wave control code for each channel; Step 5: The wave control unit determines whether the temperature compensation function is enabled according to the beam information; Step 6: If the temperature compensation function is enabled, read the temperature value of the TR component on the active subarray; Step 7: Determine whether the read temperature value is valid; Step 8: If the temperature value is within the range of -40°C to 85°C, it is considered that the collected temperature value is valid, and the amplitude-phase compensation code at the current temperature is obtained by looking up the table with an accuracy of 5°C; If the temperature value is not within the range of -40°C to 85°C, it is considered that the collected temperature value is invalid, and the temperature amplitude-phase compensation code is set to 0; Step 9: Calculate the obtained temperature amplitude-phase compensation code and the calculated amplitude-phase wave control code to obtain the final amplitude-phase code, and send it to the TR component.

[0013] Furthermore, the relationship between the amplitude-phase compensation code and temperature can be obtained through testing in a variable temperature test chamber; S1: After the component is produced, first measure the digital quantity corresponding to the current temperature and the reference amplitude-phase value at room temperature; S2: Then adjust the temperature of the temperature test chamber, with a temperature point every 5°C, and test the difference between the amplitude-phase test value and the reference amplitude-phase value at the current temperature; S3: Quantize the amplitude-phase difference value obtained in S2 digitally to obtain the temperature amplitude-phase compensation code.

[0014] Furthermore, using the system of claims 1-6, the wave control method includes a component-level temperature amplitude-phase compensation method and a subarray-level deformation phase compensation method. The subarray-level deformation phase compensation method includes the following steps: T1: The on-orbit deformation measurement single machine measures the measurement position data of each subarray; T2: The deformation measurement single machine subtracts the Z-direction reference data of each subarray from the Z-direction measurement position data of each subarray to obtain the matrix of the Z-direction position difference of the subarray , and the full array minimum value , and transmit the data to the wave control sub - unit; T3: After the wave control sub - unit receives the data of the deformation measurement single unit, subtract the Z - direction position difference matrix of the sub - array from the minimum value of the Z - direction position difference of the full array to obtain the Z - direction position difference of the normalized sub - array of the full array ; T4: The wave control sub - unit compensates the Z - direction position difference of the unit of the normalized full array according to the working frequency point of the antenna array surface and the minimum shift step of the component. The expression is , to obtain the phase shift amount of each sub - array, where f is the working frequency point of the antenna array surface and k is the number of phase - shift bits of the phase shifter; T5: The wave control sub - unit sends the phase - shift code of each sub - array in step T4 to the corresponding wave control unit, and the wave control unit performs compensation during beam calculation.

[0015] Beneficial effects: The present invention provides a wave control system and method applied to the antenna array surface of a space - borne phased - array radar. It adopts a hierarchical control architecture, reasonably allocates computing resources, reduces beam switching time, and has universality. In the sub - array wave control unit level, the main - backup cross - hot - backup and the combination of series and parallel forms are adopted, reducing the number of output signals of the wave control sub - unit and lowering the system cost. The present invention can achieve component - level temperature amplitude - phase compensation. The component wave control chip collects temperature in real - time and sends it to the wave control unit through the BIT channel, and the wave control unit completes the calculation and compensation. The present invention can achieve sub - array - level deformation phase compensation. The wave control unit realizes deformation phase compensation at the sub - array level according to the sub - array deformation amount measured by the deformation measurement system. Description of the Drawings

[0016] Figure 1 is the architecture diagram of the wave control system applied to the antenna array surface of a space - borne phased - array radar according to an embodiment of the present invention; Figure 2 is the composition diagram of the wave control unit of the system applied to the antenna array surface of a space - borne phased - array radar according to an embodiment of the present invention; Figure 3 is the schematic diagram of the cascaded RS422 interface connection of the wave control unit of the system applied to the antenna array surface of a space - borne phased - array radar according to an embodiment of the present invention; Figure 4 is the flowchart of the wave control method applied to the antenna array surface of a space - borne phased - array radar according to an embodiment of the present invention. Detailed Embodiments

[0017] As Figures 1 to 4 shown, the present invention provides a wave control system and method applied to the antenna array surface of a space - borne phased - array radar. Embodiment 1

[0018] The present invention proposes a wave control system and a high-precision amplitude-phase compensation method applied to the antenna array surface of a spaceborne phased array radar. Adopting a hierarchical control architecture, a combination of series and parallel forms is used at the sub-array wave control unit level to reduce the system cost while ensuring transmission reliability; the temperature is collected in real time by the wave control chip at the component level to achieve component-level temperature-phase compensation, eliminate the phase drift caused by temperature to the channel signal, and improve the antenna beam control performance; according to the deformation amount sent by the master control computer, the wave control unit realizes deformation-phase compensation at the sub-array level.

[0019] The present invention provides a wave control system applied to the antenna array surface of a spaceborne phased array radar. The wave control system includes a wave control extension unit, which is located outside the antenna array surface, connected to the master control computer at one end and to the wave control unit at the other end; the wave control extension unit includes a beam operation module and a signal drive module.

[0020] The wave control operation module generates information such as scanning angle, frequency point, and weighting code according to the system task, and sends it to each wave control unit according to the agreed protocol; at the same time, it receives the sub-array deformation amount sent by the master control computer and sends it to the wave control unit corresponding to each active sub-array. Among them, the sub-array deformation amount is measured by the deformation measurement sub-system.

[0021] The signal drive module performs drive power division on the signals output by the wave control extension unit and divides them into N groups for output. Each group of signals is connected to several wave control units.

[0022] The wave control system further includes: The wave control unit is located inside the antenna array surface. One end of the wave control unit is connected to the wave control extension unit, and the other end is connected to the active sub-array. Each wave control unit is connected to two active sub-arrays.

[0023] After being divided by columns, the wave control units are connected in parallel, and are cascaded by cables within the column. The input end of the first wave control unit is connected to the wave control extension unit, and the output end is connected to the input end of the next wave control unit, and so on.

[0024] The wave control unit includes a main and standby RS422 input interface circuit, an RS422 output interface circuit (BIT interface), a main control ASIC chip, a FLASH storage chip, a TTL input / output interface circuit, and a cascaded RS422 output interface circuit.

[0025] The main and standby RS422 input interface circuit includes the main RS422 input interface and the standby RS422 input interface, which checks the signal status of the main and standby paths inside the wave control unit. When the main path check is incorrect, it switches to receiving the standby path instructions; the main and standby RS422 input interface circuit is used to receive the control instructions output by the wave control sub - machine; the RS422 output interface circuit (BIT interface) is used to transmit the BIT information of the wave control unit to the wave control sub - machine. The BIT information includes the voltage, temperature, etc. of the wave control unit itself, as well as the temperature, voltage, etc. of the TR components and sub - array delay components in the active sub - array.

[0026] The main control ASIC chip has functions such as instruction reception, data management, wave control calculation, data transmission, digital power control, etc. According to the instructions received by the main and standby RS422 input interface, it calculates the original amplitude - phase control codes of all channels in the connected active sub - array and outputs them to the TTL output interface circuit in the SPI protocol; at the same time, the main control ASIC chip can also receive the temperature data returned by the TR components and sub - array delay components in the active sub - array.

[0027] The FLASH memory chip is connected to the main control ASIC chip and is used to store the relevant parameters required for the main control ASIC chip's calculation and the corresponding table of temperature and amplitude - phase compensation amounts.

[0028] One end of the TTL output interface circuit is connected to the main control ASIC chip, and the other end is connected to the components of the active sub - array. It is used to drive the amplitude - phase control codes output by the main control ASIC chip and then output them to the TR components and sub - array delay components in the active sub - array for reception; one end of the TTL input interface circuit is connected to the main control ASIC chip, and the other end is connected to the active sub - array. It is used to drive the temperature data output by the TR components and sub - array delay components in the active sub - array and then input them into the ASIC chip.

[0029] One end of the cascaded RS422 output interface circuit is connected to the main control ASIC chip, and the other end is connected to the main and standby RS422 input interfaces of the subsequent wave control unit.

[0030] Optionally, the wave control unit further includes a digital power supply, which receives the power control signal of the main control ASIC chip, controls the output or shutdown of the voltage, and realizes the power supply to other circuits of the wave control unit and the devices in the active sub - array.

[0031] The wave control system further includes: Component wave control chips, which are located in the TR components inside the antenna array surface. The TR components are installed on the active sub - array, and each active sub - array contains 64 TR components.

[0032] The component wave control chip receives the wave control codes (including amplitude, phase, and switch control information) output by the wave control unit, parses the wave control codes, and then controls the phase shifters, attenuators, and single-pole double-throw switches accordingly to achieve array beam control. The component wave control chip integrates an ADC function, which can collect the voltage of the thermistor installed in the component to obtain the digital quantity of temperature. The temperature acquisition data is sent to the wave control unit through the TTL input interface circuit of the wave control unit.

[0033] The following will Figures 1 to 3 specifically describe the embodiments of the present invention.

[0034] As Figure 1 shown, the present invention provides an architecture diagram of a wave control system applied to the antenna array of a spaceborne phased array radar; the system includes a wave control sub-unit, a wave control unit, and a component wave control chip, which are respectively connected to the phased array antenna.

[0035] The phased array antenna of

[0036] includes a wave control sub-unit; active sub-arrays, with one wave control unit corresponding to every two active sub-arrays; each active sub-array includes multiple TR components (transceiver components), each TR component contains a component wave control chip, and each component wave control chip has the function of simultaneously receiving wave control codes and sending BIT data.

[0037] The phased array antenna in this embodiment has 12 active sub-arrays, corresponding to 6 wave control units; each active sub-array includes 64 four-channel TR components.

[0038] The wave control sub-unit communicates with the main control computer through RS422, receives the task instructions sent by the main control computer, generates angle information, sends the angle information to the wave control unit, the wave control unit calculates the wave control codes, and sends the wave control codes to the TR components on the active sub-array; and monitors the status of the TR components in real time; it has the functions of voltage and temperature telemetry.

[0039] The wave control unit communicates with the wave control sub-unit through the main RS422 or standby RS422, performs beam calculation according to the instructions, obtains the wave control codes for 256 four-channel components of two sub-arrays, and sends the wave control codes to the TR components through the TTL interface to complete the beam control. At the same time, the wave control unit also has the functions of transceiver control and timing protection.

[0040] As Figure 2 shown, the wave control unit includes a main control ASIC, a data reception module, a data transmission module, an AD, a FLASH, a transmission driver, and a self-check information selection module.

[0041] The main control ASIC is a customized special chip, which is used to receive the wave control machine instructions, perform beam calculation, output wave control codes, collect the telemetry data of components, and control AD sampling, etc.

[0042] Optionally, the main control ASIC can be replaced by an FPGA.

[0043] The data receiving module is an RS422 receiving chip, which is used to receive the wave control instructions output by the wave control machine.

[0044] The data sending module is an RS422 sending chip, which is used to send the telemetry information of the wave control unit.

[0045] The AD is an AD sampling chip, which is used to sample the voltages used in the wave control unit.

[0046] The FLASH is a FLASH chip, which is used to store the relevant parameters required in the beam calculation process.

[0047] The sending driver is a TTL driver chip, which is used to drive the control signals output from the ASIC to the TR component.

[0048] The TTL receiver is a TTL driver chip, which is used to receive the self-check information output by the TR component and input it into the ASIC chip after being driven.

[0049] The wave control unit cascading method is as Figure 3 shown. The wave control submachine outputs a set of main and standby control signals. The main path signal is connected to the main RS422 input port of wave control unit 1. The ASIC of wave control unit 1 receives this path signal and checks the main path signal in the ASIC. If the check passes, the main path signal is output to the cascaded RS422 output port; otherwise, the signal of the standby RS422 input port is output to the cascaded RS422 output port.

[0050] The signal of the cascaded RS422 output port of wave control unit 1 is connected to the main RS422 input ports of wave control units 2 to 6 through a one-to-five cable Similarly, the standby path signal is connected to the standby RS422 input port of wave control unit 6. The ASIC of wave control unit 6 receives this path signal and checks the main path signal in the ASIC. If the check passes, the main path signal is output to the cascaded RS422 output port; otherwise, the signal of the standby RS422 input port is output to the cascaded RS422 output port.

[0051] The signal of the cascaded RS422 output port of wave control unit 6 is connected to the standby RS422 input ports of wave control units 2 to 6 through a one-to-five cable According to the aforementioned cascading method of the wave control unit, wave control units 1 to 6 only occupy one node of the main / channel signal bus output by the wave control extension, thus realizing the main and standby hot redundant switching. The bus utilization rate is 6 times that of the traditional parallel method. Embodiment 2

[0052] Based on the system in Embodiment 1, the present invention also provides a wave control method applied to the antenna array surface of a spaceborne phased array radar, including component-level temperature amplitude-phase compensation and sub-array-level deformation phase compensation.

[0053] The component-level temperature amplitude-phase compensation method is as follows: The component wave control chip's built-in ADC collects the component temperature, converts it into a digital quantity, and then sends it to the wave control unit through the TTL interface. The main control ASIC chip in the wave control unit receives the temperature data returned by the component, looks up the corresponding amplitude-phase compensation amount according to the temperature data in a table, and calculates this compensation amount with the originally calculated amplitude-phase control code to obtain the finally output amplitude-phase control code.

[0054] The component-level amplitude-phase temperature compensation method is as Figure 4 shown, and includes the following steps: Step 1: The wave control extension receives the power-on instruction of the TR component sent by the main control computer through the RS422 interface, sends the power-on instruction to the full-array wave control unit, and after receiving it, the wave control unit performs the power-on action on the TR component; Step 2: The wave control extension receives the initialization instruction of the TR component sent by the main control computer through the RS422 interface, sends the TR component initialization instruction to the wave control unit. After receiving it, the wave control extension sequentially sends initialization instructions such as reset, unlock, over-duty-cycle protection, and enable temperature telemetry to the TR component; Step 3: The wave control extension receives the system task instruction sent by the main control computer through the RS422 interface. After generating angle information according to the system task, it sends beam information such as scan angle, frequency point, broadening coefficient, and temperature compensation enable control to the wave control unit; Step 4: After receiving the beam information sent by the wave control extension through the RS422 interface, the wave control unit calculates the amplitude-phase wave control code for each channel; Step 5: The wave control unit determines whether the temperature compensation function is enabled according to the beam information; Step 6: If the temperature compensation function is enabled, read the temperature values of 128 TR components of two active sub-arrays; Step 7: Determine whether the read temperature values are valid: within the range of (-40°C to 85°C); Step 8: If the temperature value is within the range of (-40°C to 85°C), it is considered that the collected temperature value is valid, and the amplitude-phase compensation code at the current temperature is obtained by looking up the table with an accuracy of 5°C; if the temperature value is not within the range of (-40°C to 85°C), it is considered that the collected temperature value is invalid, and the temperature amplitude-phase compensation code is set to 0; Step 9: Calculate the temperature amplitude-phase compensation code obtained from the look-up table and the calculated amplitude-phase wave control code to obtain the final amplitude-phase code, and send it to the TR component.

[0055] The relationship between the amplitude-phase compensation code and temperature can be obtained through the following method: After the component is manufactured, it is tested in a variable temperature test chamber. First, the digital quantity corresponding to the current temperature and the reference amplitude-phase value are measured at room temperature. Then, the temperature of the test chamber is adjusted, with a temperature point every 5 °C, and the difference between the amplitude-phase test value and the reference amplitude-phase value at the current temperature is measured. After digital quantization, the amplitude-phase compensation code is obtained. Embodiment

[0056] Based on the system in Embodiment 1, the present invention further provides a wave control method applied to the antenna array surface of a spaceborne phased array radar, including component-level temperature amplitude-phase compensation and sub-array-level deformation phase compensation.

[0057] For sub-array-level deformation phase compensation, the deformation amount of each active sub-array measured by the deformation measurement unit is sent to the main control computer. The main control computer normalizes the sub-array deformation amount and sends it to the wave control sub-computer when the system is idle. The wave control sub-computer calculates the corresponding phase shift amount and sends it to the wave control unit corresponding to each active sub-array. The wave control unit calculates the final phase shift amount by operating the phase shift amount and the calculated phase shift amount, and sends it to the wave control chip in each component through the phase control code.

[0058] The sub-array-level deformation phase compensation method includes the following steps: Step 1: The on-orbit deformation measurement unit measures the measurement position data of each sub-array; Step 2: The deformation measurement unit subtracts the Z-direction reference data of each sub-array from the Z-direction measurement position data of each sub-array to obtain the matrix of the Z-direction position difference of the sub-array and the minimum value of the entire array and transmits the data to the wave control sub-computer; Step 3: After receiving the data from the deformation measurement unit, the wave control sub-computer subtracts the matrix of the Z-direction position difference of the sub-array from the minimum value of the Z-position difference of the entire array to obtain the normalized Z-direction position difference of the sub-array of the entire array ; Step 4: The wave control sub-computer compensates the normalized unit Z-direction position difference of the entire array according to the working frequency point of the antenna array surface and the minimum phase shift step of the component: to obtain the phase shift amount of each sub-array. Where f is the working frequency point of the antenna array surface and k is the number of bits of the phase shifter. Step 5: The wave control extension sends the phase shift codes of each subarray in Step 4 to the corresponding wave control unit, and the wave control unit performs compensation during beam calculation.

[0059] The present invention provides a wave control system and method applied to the antenna array surface of a spaceborne phased array radar. It adopts a hierarchical control architecture, reasonably allocates computing resources, reduces beam switching time, and has generality. In the subarray wave control unit level, the present invention adopts the form of main and standby path cross hot backup, combining series and parallel, reducing the number of output signals of the wave control extension and lowering the system cost. The present invention can realize component-level temperature amplitude-phase compensation. The component wave control chip collects temperature in real time and sends it to the wave control unit through the BIT channel, and the wave control unit completes the calculation and compensation. The present invention can realize subarray-level deformation phase compensation. The wave control unit realizes deformation phase compensation at the subarray level according to the subarray deformation amount measured by the deformation measurement system.

[0060] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wave control system applied to the antenna array surface of a spaceborne phased array radar, characterized in that It includes a master control computer, a wave control sub-computer, several wave control units, and several active sub-arrays; The wave control sub-computer is located outside the antenna array surface, connected to the master control computer at one end and to the wave control units at the other end; The wave control units are located inside the antenna array surface. One end of a wave control unit is connected to the wave control sub-computer, and the other end is connected to several active sub-arrays. The several wave control units are divided into columns and connected in parallel. They are cascaded through cables within the column. The input end of the first wave control unit is connected to the wave control sub-computer, and the output end of the first wave control unit is connected to the input ends of other wave control units within the column; The wave control unit includes a main and standby RS422 input interface circuit, an RS422 output interface circuit, a main control ASIC chip, a FLASH memory chip, a TTL input / output interface circuit, and a cascaded RS422 output interface circuit; The main and standby RS422 input interface circuit is used to receive the control instructions output by the wave control sub-computer. The main and standby RS422 input interface circuit includes a main path RS422 input interface and a standby path RS422 input interface. The signal states of the main path and the standby path are verified inside the wave control unit. When the main path verification is incorrect, it switches to receiving the standby path instructions; The RS422 output interface circuit is used to output the BIT information of the wave control unit to the wave control sub-computer. The BIT information includes the voltage and temperature of the wave control unit itself, as well as the temperature and voltage of the TR components and sub-array delay components within the active sub-array; The functions of the main control ASIC chip include instruction reception, data management, wave control calculation, data transmission, and digital power control. According to the instructions received by the main and standby RS422 input interface circuit, the original amplitude-phase control codes of all channels within the connected active sub-array are calculated and output to the TTL output interface circuit in SPI protocol. At the same time, the main control ASIC chip can also receive the temperature data returned by the TR components and sub-array delay components within the active sub-array; The FLASH memory chip is connected to the main control ASIC chip and is used to store the relevant parameters required for the main control ASIC chip to calculate and the corresponding table of temperature and amplitude-phase compensation amount; One end of the TTL output interface circuit is connected to the main control ASIC chip, and the other end is connected to the components of the active sub-array. It is used to drive the amplitude-phase control codes output by the main control ASIC chip and then output them to the TR components and sub-array delay components within the active sub-array for reception; One end of the TTL input interface circuit is connected to the main control ASIC chip, and the other end is connected to the active sub-array. It drives the temperature data output by the TR components and sub-array delay components within the active sub-array and then inputs them to the main control ASIC chip; One end of the cascaded RS422 output interface circuit is connected to the main control ASIC chip, and the other end is connected to the main and standby RS422 input interfaces of the subsequent wave control unit.

2. The wave control system applied to the phased array radar antenna panel according to claim 1, wherein The wave control sub-computer includes a beam operation module and a signal drive module; The wave control operation module generates information including scanning angle, frequency point, and weighting code according to the system task and sends it to each wave control unit according to the agreed protocol; at the same time, it receives the sub-array deformation amount sent by the master control computer and sends it to the wave control units corresponding to each active sub-array; The signal drive module drives and distributes the signals output by the wave control sub-computer and divides them into N groups for output. Each group of signals is connected to several wave control units.

3. The wave control system applied to the phased array radar antenna panel of a spaceborne radar according to claim 1, characterized in that, Each wave control unit is connected to 2 active sub-arrays.

4. The wave control system applied to the phased array radar antenna panel according to claim 1, wherein Each active sub-array includes 64 TR components, and the TR components are installed on the active sub-array.

5. The wave control system applied to the phased array radar antenna panel according to claim 4, characterized in that, The TR component also includes a component wave control chip, and the component wave control chip is located inside the TR component; The component wave control chip is used to receive the wave control code output by the wave control unit. The wave control code includes amplitude, phase, and switch control information. After parsing the wave control code, it performs corresponding control on the phase shifter, attenuator, and single-pole double-throw switch to achieve array surface beam control; The component wave control chip integrates the ADC function, can collect the voltage of the thermistor installed in the component, obtain the digital quantity of the temperature, and send the temperature acquisition data to the wave control unit through the TTL input interface circuit connected to the wave control unit.

6. The wave control system applied to the phased array radar antenna array for spaceborne use according to claim 4 or 5, characterized in that, The wave control unit also includes a digital power supply, which receives the power control signal of the main control ASIC chip, controls the output or shutdown of the voltage, and realizes the power supply to other circuits in the wave control unit and equipment in the active sub-array.

7. A wave control method applied to the antenna array surface of a spaceborne phased array radar, characterized in that, Using the system described in claims 1-6, the wave control method includes a component-level temperature amplitude-phase compensation method and a sub-array-level deformation phase compensation method. The component-level temperature amplitude-phase compensation method includes the following steps: Step 1: The wave control extension receives the power-on instruction of the TR component sent by the main control computer through the RS422 interface, sends the power-on instruction to the full-array wave control unit, and after receiving it, the wave control unit performs the power-on action on the TR component; Step 2: The wave control extension receives the initialization instruction of the TR component sent by the main control computer through the RS422 interface, sends the initialization instruction of the TR component to the wave control unit. After receiving it, the wave control extension sequentially sends the initialization instruction to the TR component. The initialization instruction includes reset, unlock, over-duty-cycle protection, and enable temperature telemetry initialization instructions; Step 3: The wave control extension receives the system task instruction sent by the main control computer through the RS422 interface. After generating the angle information according to the system task, it sends the beam information including the scan angle, frequency point, broadening coefficient, and temperature compensation enable control to the wave control unit; Step 4: After receiving the beam information sent by the wave control extension through the RS422 interface, the wave control unit calculates the amplitude-phase wave control code of each channel; Step 5: The wave control unit determines whether the temperature compensation function is enabled according to the beam information; Step 6: If the temperature compensation function is enabled, read the temperature value of the TR component on the active sub-array; Step 7: Determine whether the read temperature value is valid; Step 8: If the temperature value is within the range of -40°C to 85°C, it is considered that the collected temperature value is valid, and the amplitude-phase compensation code at the current temperature is obtained by looking up the table with an accuracy of 5°C; If the temperature value is not within the range of -40°C to 85°C, it is considered that the collected temperature value is invalid, and the temperature amplitude-phase compensation code is set to 0; Step 9: Calculate the temperature amplitude-phase compensation code obtained by looking up the table with the calculated amplitude-phase wave control code to obtain the final amplitude-phase code, and send it to the TR component.

8. The wave control method applied to the phased array radar antenna array for spaceborne use according to claim 7, wherein The relationship between the amplitude-phase compensation code and the temperature can be obtained by testing in a variable temperature test chamber; S1: After the component is produced, first measure the digital quantity corresponding to the current temperature and the reference amplitude-phase value under room temperature conditions; S2: Readjust the temperature of the temperature test chamber at each temperature point of 5°C, and measure the difference between the amplitude-phase test value and the reference amplitude-phase value at the current temperature; S3: After digital quantization of the amplitude-phase difference value obtained in S2, a temperature amplitude-phase compensation code is obtained.

9. A wave control method applied to the antenna array surface of a spaceborne phased array radar, characterized in that, Using the system described in claims 1-6, the wave control method includes a component-level temperature amplitude-phase compensation method and a sub-array-level deformation phase compensation method. The sub-array-level deformation phase compensation method includes the following steps: T1: The on-orbit deformation measurement unit measures the measurement position data of each sub-array; T2: The deformation measurement single machine subtracts the Z-direction reference data of each sub-array from the Z-direction measurement position data of each sub-array to obtain a matrix of the Z-direction position differences of the sub-arrays , as well as the minimum value of the entire array , and transmits the data to the wave control sub-unit; T3: After the wave control extension receives the data of the deformation measurement single unit, it subtracts the sub-array Z-direction position difference matrix from the minimum value of the full-array Z position difference to obtain the sub-array Z-direction position difference after full-array normalization ; T4: The wave control extension compensates the unit Z-direction position difference after full-array normalization according to the operating frequency point of the antenna array surface and the minimum shift step of the component. The expression is , and the phase shift amount of each sub-array is obtained, where f is the operating frequency point of the antenna array surface and k is the phase shift bit number of the phase shifter; T5: The wave control extension sends the phase shift code of each sub-array in step T4 to the corresponding wave control unit, which is compensated during beam calculation by the wave control unit.

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