Multifunctional satellite-borne integrated radio frequency system and device

Abstract

The invention provides a multifunctional satellite-borne integrated radio frequency system and device. The multifunctional satellite-borne integrated radio frequency system comprises a broadband low-profile integrated transceiver array, a reconfigurable integrated radio frequency front end and a flexible high-performance processing platform, the broadband low-profile integrated transceiving array adopts a multi-subarray design, has the capabilities of multi-beam signal transceiving, two-dimensional wide-angle beam scanning and received signal low-noise amplification, and adopts a low-profile and foldable structural design to adapt to the constraint of a satellite-borne platform; the reconfigurable integrated radio frequency front end has the capabilities of full-band signal up-down conversion processing and multi-channel full-interaction radio frequency routing; the flexible high-performance processing platform adopts a reconfigurable, open-type and high-reliability digital processing architecture, and has the functions of intermediate-frequency signal high-speed sampling, high-performance digital processing, software definition and on-orbit dynamic upgrading. According to the invention, a traditional discrete satellite-borne radio frequency system can be converted into a high-integration, multifunctional and conformal system, and the scale of the satellite-borne radio frequency system can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of aerospace vehicle technology, and in particular to a multifunctional satellite-borne integrated radio frequency system and device. Background Art

[0002] With the continuous development of radio technology, the application scope of electromagnetic waves in the shipborne, airborne and satellite fields is constantly expanding, and the types and numbers of RF systems on the above platforms are constantly increasing. If the traditional RF system is decentralized, independent and dedicated, the design concept will result in a large scale of RF system equipment, and various platforms will find it difficult to meet the system deployment requirements. In order to solve the above contradictions, the concept of integrated RF system has been proposed, and countries around the world have carried out extensive research. At the same time, with the advancement of active phased array and digital processing technology, airborne electronic systems are gradually shifting towards RF integration. Satellite platforms are very different from shipborne and airborne platforms in terms of operating environment, resource constraints, application requirements, etc. Therefore, there are still many technical difficulties in the integration of satellite RF systems.

[0003] The paper "Research on Shipborne Integrated RF Open System Architecture Technology" proposes an overall architecture design for shipborne integrated RF system integration, which includes modular RF front-end, distributed signal processing and centralized public computing. It has certain reference significance, but does not specifically solve related problems under the constraints of the satellite platform and cannot be applied to the purposes described in the present invention.

[0004] The paper "Design of a Universal Processing Module for Airborne Integrated RF System" presents a hardware design of a unified high-performance universal processing platform suitable for integrated RF systems. It has certain engineering practice significance, but it is not a systematic design of satellite-borne integrated RF system and cannot be applied to the purposes described in the present invention.

[0005] The paper “Multifunctional Integrated RF System Design” presents a multifunctional RF system design, including RF reception, RF transmission and local oscillator system, but it is not a systematic design for satellite-borne integrated RF system and cannot be applied to the purposes described in the present invention.

[0006] Patent document CN113612570A discloses an airborne multifunctional integrated radio frequency system, including a distributed broadband multifunctional aperture and a modular open radio frequency system architecture, but it is not a systematic design for satellite-borne integrated radio frequency systems and cannot be applied to the purposes described in the present invention.

[0007] Patent document CN109245833B discloses a universal RF measurement and control system and method for spacecraft, which realizes the integrated design of the spacecraft measurement and control system and greatly reduces the scale of the measurement and control system. However, it is not a systematic design for the onboard integrated RF system and cannot be applied to the purposes described in the present invention. Summary of the invention

[0008] In view of the defects in the prior art, the object of the present invention is to provide a multifunctional satellite-borne integrated radio frequency system and device.

[0009] The multifunctional satellite-borne integrated radio frequency system provided by the present invention comprises:

[0010] Broadband low-profile integrated transceiver array: adopts a multi-subarray modular design, with multi-beam signal transmission and reception, two-dimensional wide-angle beam scanning capabilities, and adopts a low-profile, deployable structure design to adapt to the installation and envelope constraints of the satellite platform;

[0011] Reconfigurable integrated RF front end: realizes up and down conversion, secondary amplification and arbitrary channel switching and gating functions of RF and IF signals required by the system;

[0012] Flexible high-performance processing platform: It adopts a reconfigurable, open, and highly reliable digital processing architecture, with beam pointing calculation, high-speed sampling of intermediate frequency signals, and high-performance digital processing capabilities. By loading different software function packages, the system can be multifunctional and definable.

[0013] Preferably, the broadband low-profile integrated transceiver array includes a high-band array and a low-band array, and adopts an active electronic scanning array AESA system. The high / low-band arrays are designed according to 8 sub-arrays, each sub-array is composed of multiple modules, and each module is composed of multiple 4-channel TR components. Each sub-array has independent beam transmission and reception and two-dimensional large-angle scanning capabilities. When transmitting, the excitation signal is amplified at high power and spatially radiated. When receiving, the signal is low-noise amplified, and the multi-beams of the entire array work independently.

[0014] Preferably, the high / low frequency band array comprises an active component layer, a phase change energy storage mounting plate and a radiation unit layer;

[0015] The array adopts a lightweight, highly integrated stacked design. The phase-change energy storage mounting plate provides mounting interfaces for the active component layer and the radiation unit layer, and uses phase-change materials to achieve thermal management of high heat consumption arrays.

[0016] The active component layer includes a time-delay amplification component, a power division network, and a cable, which are installed on the reverse side of the phase change energy storage installation board;

[0017] The radiation unit layer includes T / R components and antenna radiation units. The arrangement and spacing of the radiation units are selected by comprehensively considering the operating frequency, scanning range, and number of units.

[0018] A high thermal conductivity graphene film is pasted on the back of the phase change energy storage mounting plate to achieve a uniform temperature design for the array surface, and a wave-transparent nano-thermal control film is pasted on the surface of the radiation unit layer to increase the thermal radiation of the array surface space.

[0019] Preferably, a frame structure is used as the main load-bearing structure of the array and provides an external mechanical installation interface for the array. The frame structure uses a high modulus carbon fiber composite material to meet the high flatness requirements of the array under alternating high and low temperature conditions in space.

[0020] Preferably, a compression and release mechanism is used to achieve compression and retraction of the high / low frequency band array on the satellite body, and after entering orbit, the pyrotechnics are detonated and unlocked under command control.

[0021] Preferably, an unfolding mechanism is used as a power source for unfolding the array after the satellite enters orbit, and at the same time provides a rotation axis for the array and the satellite body to achieve locking of the array after it is unfolded into place.

[0022] Preferably, the reconfigurable integrated RF front end includes a full-band up-down conversion module, a broadband full-switch RF routing module, a frequency source module and a power supply module;

[0023] The full-band up-down conversion module realizes up-down conversion, secondary amplification and bandpass filtering of signals within the system working frequency band;

[0024] The broadband fully switched RF routing module is composed of broadband high-speed switches to achieve arbitrary gating of RF signals of each channel;

[0025] The frequency source module provides different local oscillator signals;

[0026] The power supply module converts the primary power supply into the secondary power supply required by other modules.

[0027] Preferably, the flexible high-performance processing platform adopts a reconfigurable, open, and highly reliable digital processing architecture, and is composed of high-performance hardware, software-hard decoupling middleware, and a professional algorithm software package;

[0028] The high-performance hardware completes high-speed sampling and high-performance digital processing of intermediate frequency signals;

[0029] The software-hardware decoupling middleware realizes the unified and standardized description of the hardware interface, thereby realizing the decoupling of software and hardware;

[0030] The professional algorithm software package consists of a measurement and control function package, a data transmission function package, a communication function package and a SAR function package, which realizes digital signal processing of different functions, realizes the multifunctional and definable radio frequency system, and adapts to different task requirements.

[0031] Preferably, the high-performance hardware includes a signal processing module, an AI processing module, a signal exchange module and a large-capacity storage module;

[0032] The signal processing module is composed of a multi-channel analog-to-digital conversion ADC, a digital-to-analog conversion DAC, a high-performance FPGA and a multi-core DSP to complete the sampling, processing and generation of digital signals;

[0033] The AI ​​processing module realizes intelligent signal processing by combining artificial intelligence chip with FPGA architecture;

[0034] The signal exchange module implements arbitrary routing of received digital signals and scheduling of processing resources according to the working mode;

[0035] The large-capacity storage module adopts a high-reliability NAND FLASH chip, providing a storage capacity of no less than 2T bytes, and realizing long-term storage of effective payload on-orbit data.

[0036] The multifunctional satellite-borne integrated radio frequency device provided by the present invention adopts the multifunctional satellite-borne integrated radio frequency system.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] (1) The present invention proposes a universal architecture of an integrated RF system under the constraints of a satellite platform, which can transform the traditional discrete satellite RF system into a highly integrated, multifunctional and conformal one, and effectively reduce the scale of the satellite RF system;

[0039] (2) The broadband low-profile integrated transceiver array suitable for satellite-borne platform constraints proposed in the present invention adopts a hierarchical and modular design, a low-profile stacked design to meet the satellite-borne platform envelope constraints, and adopts a variety of thermal control methods to meet the satellite-borne operating environment;

[0040] (3) The flexible high-performance processing platform proposed in the present invention adopts a reconfigurable and open digital processing architecture, fully decouples software and hardware, and realizes the multifunctional and definable RF system to adapt to different task requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0042] Figure 1 This is a schematic diagram of the structure of a multifunctional satellite-borne integrated radio frequency system of the present invention;

[0043] Figure 2 This is a schematic diagram of the modular distribution of a broadband low-profile integrated transceiver array;

[0044] Figure 3 Schematic diagram of the broadband low-profile integrated transceiver array stacking design. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0046] Example

[0047] like Figure 1 As shown, this embodiment provides a multifunctional satellite-borne integrated RF system, including: a broadband low-profile integrated transceiver array: adopts a multi-subarray modular design, has multi-beam signal reception and transmission, and two-dimensional wide-angle beam scanning capabilities, and adopts a low-profile, expandable and retractable structure design to adapt to satellite platform installation and envelope constraints; a reconfigurable RF front end: realizes the up and down conversion, secondary amplification and arbitrary channel switching and gating functions of the RF and intermediate frequency signals required by the system; a flexible high-performance processing platform: adopts a reconfigurable, open, and highly reliable digital processing architecture, has the capabilities of beam pointing calculation, high-speed sampling of intermediate frequency signals, and high-performance digital processing, and realizes the multi-functionality of the system by loading different software function packages.

[0048] Specifically, Figure 2 The broadband low-profile integrated transceiver array shown is divided into a high-band array and a low-band array. The array adopts the AESA (active electronic scanning array) system. The high-band and low-band arrays are designed according to 8 sub-arrays, each of which is composed of several modules, and each module is composed of several 4-channel TR components. Each sub-array module has the ability to independently transmit and receive beams and scan in two dimensions at a large angle. When transmitting, it can amplify the excitation signal with high power and radiate it in space. When receiving, it can complete low-noise amplification of the signal. Each sub-array of the entire array can work independently.

[0049] Specifically, Figure 3 The broadband low-profile integrated transceiver array shown in the figure, the high / low frequency band array includes an active component layer, a phase change energy storage mounting plate, and a radiation unit layer. The array adopts a lightweight and highly integrated stacked design. The phase change energy storage mounting plate provides an installation interface for the active component layer and the radiation unit layer, and realizes the thermal management of the high heat consumption array through phase change materials; the active component layer includes time-delay amplification components, power division networks, cables and other parts, which are installed on the back of the phase change energy storage mounting plate; the radiation unit layer includes T / R components and antenna radiation units. The arrangement and spacing of the radiation units are selected by comprehensively considering factors such as the operating frequency, scanning range, and number of units. A high thermal conductivity graphene film is pasted on the back of the phase change energy storage mounting plate to achieve a uniform temperature design for the array surface, and a wave-transmitting nano-thermal control film is pasted on the surface of the radiation unit layer to increase the thermal radiation of the array surface space.

[0050] Specifically, Figure 2The broadband, low-profile, integrated transceiver array shown in the figure uses a frame structure as the main load-bearing structure of the array and provides an external mechanical installation interface for the array. The frame structure uses a high-modulus carbon fiber composite material to meet the high flatness requirements of the array under the alternating high and low temperature conditions in space. A compression and release mechanism is used to achieve the compression and retraction of the high and low frequency arrays on the satellite body, and after entering orbit, the pyrotechnics are detonated and unlocked under command control. A deployment mechanism is used as the power source for deploying the array after the satellite enters orbit, while providing the rotation axis of the array and the satellite body and realizing the locking of the array after it is deployed into place.

[0051] Specifically, Figure 1 The reconfigurable RF front end shown in the figure includes a full-band up-down conversion module and a broadband fully-switched RF routing module. The full-band up-down conversion module includes sub-modules such as an up-conversion module, a down-conversion module, a frequency source module, and a power module. The up-conversion and down-conversion modules complete the multi-channel RF and intermediate frequency conversion, signal amplification and bandpass filtering, the frequency source module can provide different local oscillator signals, the power module can convert the primary power supply to the secondary power supply required by other modules, and the broadband fully-switched RF routing module is composed of broadband high-speed switches to realize the arbitrary selection of RF signals of each channel.

[0052] Specifically, Figure 1 The flexible high-performance processing platform shown adopts a reconfigurable, open, and highly reliable digital processing architecture, and is composed of high-performance hardware, software and hardware decoupling middleware, and professional algorithm software packages. The high-performance hardware includes signal processing modules, AI processing modules, signal exchange modules, and large-capacity storage modules, which can complete functions such as high-speed sampling of intermediate frequency signals and high-performance digital processing; the software and hardware decoupling middleware realizes the unified and standardized description of the hardware interface and realizes the decoupling of software and hardware; the professional algorithm software package is composed of different task function packages such as measurement and control function packages, data transmission function packages, and communication function packages, which complete digital signal processing of different functions, realize digital signal processing of different functions, and realize the multi-functional and definable RF system to adapt to different task requirements.

[0053] Specifically, Figure 1 The high-performance hardware shown includes signal processing module, AI processing module, signal exchange module and large-capacity storage module. The signal processing module is composed of multi-channel ADC (analog-to-digital conversion), DAC (digital-to-analog conversion), high-performance FPGA and multi-core DSP to complete the sampling, processing and generation of digital signals; the AI ​​processing module realizes intelligent signal processing through artificial intelligence chip + FPGA architecture; the signal exchange module realizes arbitrary routing of received digital signals and scheduling of processing resources according to the working mode; the large-capacity storage module adopts high-reliability NAND FLASH chip, providing a storage capacity of no less than 2T bytes, realizing long-term storage of payload on-orbit data.

[0054] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] Those skilled in the art know that, in addition to implementing the system, device and its various modules provided by the present invention in a purely computer-readable program code, it is entirely possible to implement the same program in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers and embedded microcontrollers by logically programming the method steps. Therefore, the system, device and its various modules provided by the present invention can be considered as a hardware component, and the modules included therein for implementing various programs can also be considered as structures within the hardware component; the modules for implementing various functions can also be considered as both software programs for implementing the method and structures within the hardware component.

[0056] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A multifunctional satellite-borne integrated radio frequency system, characterized in that: include: Broadband low-profile integrated transceiver array: adopts a multi-subarray modular design, with multi-beam signal transmission and reception, two-dimensional wide-angle beam scanning capabilities, and adopts a low-profile, deployable structure design to adapt to the installation and envelope constraints of the satellite platform; Reconfigurable integrated RF front end: realizes up and down conversion, secondary amplification and arbitrary channel switching and gating functions of RF and IF signals required by the system; Flexible high-performance processing platform: It adopts a reconfigurable, open, and highly reliable digital processing architecture, with beam pointing calculation, high-speed sampling of intermediate frequency signals, and high-performance digital processing capabilities. By loading different software function packages, the system can be multifunctional and definable.

2. The multifunctional satellite-borne integrated radio frequency system according to claim 1, characterized in that: The broadband low-profile integrated transceiver array includes a high-band array and a low-band array, and adopts an active electronic scanning array AESA system. The high / low-band arrays are designed according to 8 sub-arrays, each sub-array is composed of multiple modules, and each module is composed of multiple 4-channel TR components. Each sub-array has the ability to independently transmit and receive beams and perform two-dimensional large-angle scanning. When transmitting, the excitation signal is amplified at high power and spatially radiated. When receiving, the signal is low-noise amplified, and the multi-beams of the entire array work independently.

3. The multifunctional satellite-borne integrated radio frequency system according to claim 2, characterized in that: The high / low frequency band array comprises an active component layer, a phase change energy storage mounting plate and a radiation unit layer; The array adopts a lightweight, highly integrated stacked design. The phase-change energy storage mounting plate provides mounting interfaces for the active component layer and the radiation unit layer, and uses phase-change materials to achieve thermal management of high heat consumption arrays. The active component layer includes a time-delay amplification component, a power division network, and a cable, which are installed on the reverse side of the phase change energy storage installation board; The radiation unit layer includes T / R components and antenna radiation units. The arrangement and spacing of the radiation units are selected by comprehensively considering the operating frequency, scanning range, and number of units. A high thermal conductivity graphene film is pasted on the back of the phase change energy storage mounting plate to achieve a uniform temperature design for the array surface, and a wave-transparent nano-thermal control film is pasted on the surface of the radiation unit layer to increase the thermal radiation of the array surface space.

4. The multifunctional satellite-borne integrated radio frequency system according to claim 2, characterized in that: The frame structure is used as the main load-bearing structure of the array and provides an external mechanical installation interface for the array. The frame structure uses high-modulus carbon fiber composite materials to meet the high flatness requirements of the array under alternating high and low temperature conditions in space.

5. The multifunctional satellite-borne integrated radio frequency system according to claim 2, characterized in that: A compression and release mechanism is used to achieve the compression and retraction of the high / low frequency band arrays on the satellite body. After entering orbit, the pyrotechnics are detonated and unlocked under command control.

6. The multifunctional satellite-borne integrated radio frequency system according to claim 2, characterized in that: The deployment mechanism is used as the power source for the array deployment after the satellite enters orbit, and at the same time provides the rotation axis of the array and the satellite body to achieve locking of the array after it is deployed into place.

7. The multifunctional onboard integrated radio frequency system according to claim 1, characterized in that: The reconfigurable integrated RF front end includes a full-band up-down conversion module, a broadband full-switch RF routing module, a frequency source module and a power supply module; The full-band up-down conversion module realizes up-down conversion, secondary amplification and bandpass filtering of signals within the system working frequency band; The broadband fully switched RF routing module is composed of broadband high-speed switches to achieve arbitrary gating of RF signals of each channel; The frequency source module provides different local oscillator signals; The power supply module converts the primary power supply into the secondary power supply required by other modules.

8. The multifunctional onboard integrated radio frequency system according to claim 1, characterized in that: The flexible high-performance processing platform adopts a reconfigurable, open, and highly reliable digital processing architecture, consisting of high-performance hardware, software-hard decoupling middleware, and professional algorithm software packages; The high-performance hardware completes high-speed sampling and high-performance digital processing of intermediate frequency signals; The software-hardware decoupling middleware realizes the unified and standardized description of the hardware interface, thereby realizing the decoupling of software and hardware; The professional algorithm software package consists of a measurement and control function package, a data transmission function package, a communication function package and a SAR function package, which realizes digital signal processing of different functions, realizes the multifunctional and definable radio frequency system, and adapts to different task requirements.

9. The multifunctional satellite-borne integrated radio frequency system according to claim 8, characterized in that: The high-performance hardware includes a signal processing module, an AI processing module, a signal exchange module and a large-capacity storage module; The signal processing module is composed of a multi-channel analog-to-digital conversion ADC, a digital-to-analog conversion DAC, a high-performance FPGA and a multi-core DSP to complete the sampling, processing and generation of digital signals; The AI ​​processing module realizes intelligent signal processing by combining artificial intelligence chip with FPGA architecture; The signal exchange module implements arbitrary routing of received digital signals and scheduling of processing resources according to the working mode; The large-capacity storage module adopts a high-reliability NAND FLASH chip, providing a storage capacity of no less than 2T bytes, and realizing long-term storage of effective payload on-orbit data.

10. A multifunctional satellite-borne integrated radio frequency device, characterized in that: A multifunctional satellite-borne integrated radio frequency system as described in any one of claims 1 to 9 is adopted.

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