Satellite-borne phased-array antenna system

Abstract

The invention relates to the technical field of antennas, in particular to a satellite-borne phased-array antenna system, which comprises an antenna array, a radio frequency transceiving component and a digital signal processing board, the antenna array comprises at least two antenna array elements; the radio frequency transceiving assembly comprises at least one multi-channel integrated module; the first end of the multi-channel integrated module is connected with the at least two antenna array elements, and the second end of the multi-channel integrated module is connected with the digital signal processing board; any antenna array element is used for converting an electromagnetic wave signal into a first analog signal and sending the first analog signal to the multi-channel integrated module; any multi-channel integrated module is used for performing analog beam forming, generating a second analog signal and sending the second analog signal to the digital signal processing board; and the digital signal processing board is used for converting each second analog signal into a digital signal and performing digital beam forming to obtain a target receiving signal. In this way, the number of channels of the system is reduced by achieving secondary beam forming through radio frequency multi-channel integration, and the communication efficiency of the satellite-borne phased-array antenna system is improved.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a satellite-borne phased array antenna system. Background Art

[0002] Spaceborne phased array antennas are an important part of the design of communication satellite systems, and their performance plays a vital role in the development cost and life of satellites. With the development of microelectronics technology, spaceborne phased array antennas are developing in the direction of "smaller size, shorter cycle, lower cost, higher strength, and greater flexibility".

[0003] Existing satellite-borne phased array antenna systems usually adopt a tile-type phased array antenna design. Due to the large number of channels formed, the design results in a large size and high energy consumption, and the communication efficiency of the satellite-borne phased array antenna system is low. Summary of the invention

[0004] In view of this, the embodiments of the present application at least provide a satellite-borne phased array antenna system, which reduces the number of system channels by implementing secondary beamforming through RF multi-channel integration, thereby improving the communication efficiency of the satellite-borne phased array antenna system.

[0005] The embodiment of the present application provides a satellite-borne phased array antenna system, the satellite-borne phased array antenna system comprising: an antenna array, a radio frequency transceiver component and a digital signal processing board; the antenna array comprises at least two antenna array elements; the radio frequency transceiver component comprises at least one multi-channel integrated module; the first end of the multi-channel integrated module is communicatively connected to the at least two antenna array elements, and the second end of the multi-channel integrated module is communicatively connected to the digital signal processing board; wherein, Any of the antenna array elements is used to convert the received electromagnetic wave signal into a first analog signal and send it to the corresponding multi-channel integrated module; Any of the multi-channel integrated modules is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board; The digital signal processing board is used to convert each received second analog signal into a corresponding first digital signal, and perform digital beamforming on each first digital signal to obtain a target received signal.

[0006] Furthermore, the digital signal processing board is further used to perform digital beamforming on the target transmission signal to obtain at least one second digital signal, and convert the at least one second digital signal into a corresponding third analog signal, and send it to the corresponding multi-channel integrated module; Any of the multi-channel integrated modules is further used to perform analog beamforming on the received third analog signal to generate at least two fourth analog signals, and send the at least two fourth analog signals to corresponding antenna array elements; Any of the antenna array elements is further used to convert the received fourth analog signal into an electromagnetic wave signal and transmit it to a corresponding spatial direction.

[0007] Furthermore, the antenna array is a low-profile microstrip antenna array.

[0008] Furthermore, any of the multi-channel integrated modules is a multi-channel chip using system-level packaging; the multi-channel chip is packaged with a channel allocation chip, at least two digital phase shifters, at least two single-pole three-throw switches, at least two low-noise amplifiers, at least two power amplifiers and at least two digital attenuators; the first end of the channel allocation chip is connected to the digital signal processing board, and the second end of the channel allocation chip includes at least two channels, each channel is connected to the first end of a digital phase shifter; the second end of each digital phase shifter is connected to the common end of a single-pole three-throw switch; the first output end of each single-pole three-throw switch is connected to the antenna array element of the corresponding channel through a low-noise amplifier and a digital attenuator, and the second output end of each single-pole three-throw switch is connected to the antenna array element of the corresponding channel through a power amplifier; the third output end of each single-pole three-throw switch is grounded.

[0009] Furthermore, when any of the multi-channel integrated modules is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board, the common end of each single-pole triple-throw switch is connected to the first output end.

[0010] Furthermore, when any of the multi-channel integrated modules is used to perform analog beamforming on the received third analog signal, generate at least two fourth analog signals, and send the at least two fourth analog signals to the corresponding antenna array elements, the common end and the second output end of each single-pole triple-throw switch are connected.

[0011] Further, when any of the multi-channel integrated modules is not working, the common end of each single-pole triple-throw switch is connected to the third output end.

[0012] Furthermore, the digital signal processing board is an FPGA integrated with at least two dual-channel integrated analog-to-digital conversion chips.

[0013] Furthermore, the digital signal processing board is also integrated with at least one of the following interfaces: CAN bus interface, GTH data interface, RS422 interface and LVDS interface.

[0014] Furthermore, the satellite-borne phased array antenna system also includes a power module; the power module is electrically connected to the RF transceiver component and the digital signal processing board respectively; wherein, The power module is used to supply power to the radio frequency transceiver component and the digital signal processing board.

[0015] The embodiment of the present application provides a satellite-borne phased array antenna system, including an antenna array, a radio frequency transceiver component and a digital signal processing board; the antenna array includes at least two antenna array elements; the radio frequency transceiver component includes at least one multi-channel integrated module; the first end of the multi-channel integrated module is communicatively connected to at least two antenna array elements, and the second end of the multi-channel integrated module is communicatively connected to the digital signal processing board; wherein any antenna array element is used to convert the received electromagnetic wave signal into a first analog signal and send it to the corresponding multi-channel integrated module; any multi-channel integrated module is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board; the digital signal processing board is used to convert each received second analog signal into a corresponding first digital signal, and perform digital beamforming on each first digital signal to obtain a target received signal. In this way, the number of channels of the system is reduced by realizing secondary beam synthesis through radio frequency multi-channel integration, thereby improving the communication efficiency of the satellite-borne phased array antenna system.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 One of the functional module diagrams of a satellite-borne phased array antenna system provided in an embodiment of the present application is shown; Figure 2 A schematic diagram showing the connection between the multi-channel integrated module and the antenna array element in an embodiment of the present application is shown; Figure 3 A schematic diagram of the structure of a satellite-borne phased array antenna system in an embodiment of the present application is shown; Figure 4 A schematic diagram of the structure of a multi-channel chip in an embodiment of the present application is shown; Figure 5 A second functional module diagram of a satellite-borne phased array antenna system provided in an embodiment of the present application is shown.

[0019] Description of main component symbols: In the figure: 100-satellite phased array antenna system; 110-antenna array; 120-RF transceiver component; 130-digital signal processing board; 111-antenna array element; 121-multi-channel integrated module; 140-power module; 200-multi-channel chip; 210-channel distribution chip; 220-digital phase shifter; 230-single-pole triple-throw switch; 240-low noise amplifier; 250-power amplifier; 260-digital attenuator. DETAILED DESCRIPTION In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0020] To facilitate the understanding of the present application, the technical solution provided by the present application is described in detail below in conjunction with specific embodiments.

[0021] First, research has found that existing satellite-borne phased array antenna systems usually adopt a tile-type phased array antenna design. Due to the large number of channels formed, the design results in a large size and high energy consumption, and the communication efficiency of the satellite-borne phased array antenna system is low.

[0022] Based on this, an embodiment of the present application provides a satellite-borne phased array antenna system, which reduces the number of system channels by implementing secondary beamforming through RF multi-channel integration, thereby improving the communication efficiency of the satellite-borne phased array antenna system.

[0023] See also Figure 1 , Figure 1 This is a functional module diagram of a satellite-borne phased array antenna system provided in an embodiment of the present application. Figure 1As shown, the satellite-borne phased array antenna system 100 provided in the embodiment of the present application includes: an antenna array 110, a radio frequency transceiver component 120 and a digital signal processing board 130; the antenna array 110 includes at least two antenna array elements 111; the radio frequency transceiver component 120 includes at least one multi-channel integrated module 121; the first end of the multi-channel integrated module 121 is communicatively connected to the at least two antenna array elements 111, and the second end of the multi-channel integrated module 121 is communicatively connected to the digital signal processing board 130.

[0024] In the embodiment of the present application, based on the structural integration design concept of modular micro-satellites, the implementation of the satellite-borne phased array antenna system adopts a modular design approach, which can effectively reduce the cost and weight and size of the satellite-borne phased array antenna system. Specifically, the satellite-borne phased array antenna system 100 belongs to a time-division phased array transceiver system, and the antenna array 110 operates in the S and C bands. The antenna array 110 can be designed using a multi-layer microstrip line method, and the dielectric constant of the plate is stable and the matching bandwidth is wide. The RF transceiver component 120 adopts a multi-channel integrated design. In the embodiment of the present application, the multi-channel integrated module 121 adopts a four-channel integrated module. A single channel has an independent receive and transmit phase shift function. The transmit saturation power of a single channel is designed to be around 0.1w, which has good linearity and high efficiency. Please refer to Figure 2 , Figure 2 Schematic diagram of the connection between the multi-channel integrated module and the antenna array element in the embodiment of the present application. Figure 2 As shown, the multi-channel integrated module 121 adopts chip packaging and can be directly mounted on the back panel of the antenna array and connected to the corresponding antenna array element 111. Compared with the traditional tile-type satellite-borne phased array antenna system, the weight and volume of the components are greatly reduced. The multi-channel integrated module 121 is connected to the digital signal processing board 130. The digital signal converter 130 can transmit radio frequency signals to the multi-channel integrated module 121, and can also sample and beamform the received signals. Through the two-level hybrid beamforming technology, a 64-channel digital beamforming network is formed in the digital signal processing board 130. The interface device of the digital signal processing board 130 can be designed with a low-power device that integrates multiple digital AD and DA sampling chips. The direct sampling processing method of the radio frequency signal can be adopted, which has better synchronization and no longer needs to be processed by up and down conversion. According to the digital beamforming (DBF) algorithm, the digital signal processing board 130 can synthesize and apply multiple beams to realize the signal transmission and reception functions. Simulations at baseband show that at least 16 spatial multi-beamforming can be achieved within the effective range of gain assurance. Among them, any antenna array element 111 is used to convert the received electromagnetic wave signal into a first analog signal and send it to the corresponding multi-channel integrated module 121. Any multi-channel integrated module 121 is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board 130 .

[0025] Here, the multi-channel integrated module 121 performs preliminary analog beamforming (ABF) through analog circuits, and usually uses a phase shifter to adjust the phase of each antenna array element 111 to form a beam in a specific direction. In the embodiment of the present application, the advantage of analog beamforming is that it has high beam synthesis efficiency and low power consumption.

[0026] The digital signal processing board 130 is used to convert each received second analog signal into a corresponding first digital signal, and perform digital beamforming on each first digital signal to obtain a target received signal.

[0027] Here, on the digital signal processing board 130, the first digital signal converted from the second analog signal of the RF transceiver component 120 is further digitally beamformed. This includes weighting the first digital signal to optimize the direction and shape of the beam to the target received signal. In the embodiment of the present application, digital beamforming provides greater flexibility, allowing the amplitude and phase of the signal to be precisely controlled in the digital domain. Specifically, the digital signal processing board 130 can adopt a timing synchronization design to achieve the synthesis of the amplitude and phase digital beams of each channel information. The weighting in the synthesis can select different windows according to application requirements, such as Taylor window, Hamming window, etc. The digital synthesis weighting will lose a certain signal-to-noise ratio, and the link should be recalculated.

[0028] In the embodiment of the present application, the ABF of the multi-channel integrated module 121 is combined with the DBF of the digital signal processing board 130 to realize the secondary beamforming (Hybrid Beamforming, HBF), and realize the initial beamforming with low power consumption and high efficiency in the analog domain. Then, in the digital domain, the signal is further weighted and processed to achieve more refined beam control, which effectively reduces the number of channels of the system in the digital domain, achieves performance close to full digital beamforming (Full Digital Beamforming, FDBF) with lower power consumption and hardware cost, and improves the communication efficiency of the satellite-borne phased array antenna system.

[0029] Furthermore, HBF makes the system application more flexible, with the function of at least 16-beam communication multi-beam, which can achieve ultra-large cell coverage and increase the system communication capacity. Specifically, the increase in system capacity is mainly due to the transceiver application of multi-beam. In the traditional parabolic antenna, the beam is single and the coverage range is limited. Multi-beam can cover multiple sub-areas at the same time and communicate at the same time. Here, the formation of phased array multi-beam is based on the phase change of each channel and is synthesized simultaneously. By controlling the design combination of the phase of each channel, the antenna pattern can be shaped so that the antenna can complete the electronic scanning within the coverage range. In the design of beam scanning, the existing traditional phased array can only perform multi-beam scanning transmission coverage through the phase shifters of each channel. Channel aliasing will occur during reception, and the signals of each cell cannot be effectively distinguished, making it difficult to realize multi-beam transceiver application. The existing on-board system usually has only one channel. If you want to form multiple beams when receiving, you need to be equipped with a multi-beam equipment network. The structure will become extremely complex and the cost weight will be greatly increased. Based on this, this application adopts HBF of digital channels to replace the complex beamforming network and perform secondary digital beamforming, which can realize the subdivision of beams in a large range and analyze the coverage cell information in different directions, so that the beams can be configured in more areas. At the same time, compared with FDBF, HBF can save more energy and system processing power requirements, which greatly improves the flexibility of beams. The multi-channel design mainly solves the problem of multi-beam reception. The original data contains information from multiple angles. Through DBF synthesis, the information of each angle can be extracted, thereby distinguishing different communication users and improving the communication capacity.

[0030] Furthermore, the digital signal processing board 130 is further used to perform digital beamforming on the target transmission signal to obtain at least one second digital signal, and convert the at least one second digital signal into a corresponding third analog signal, and send it to the corresponding multi-channel integrated module 121; Any multi-channel integrated module 121 is further used to perform analog beamforming on the received third analog signal to generate at least two fourth analog signals, and send the at least two fourth analog signals to the corresponding antenna array element 111; Any antenna array element 111 is further configured to convert the received fourth analog signal into an electromagnetic wave signal and transmit it to a corresponding spatial direction.

[0031] Here, the principle of the signal transmission process is similar to the above-mentioned signal receiving process. During the signal transmission process, HBF can process the digital signal through DBF and then transmit the signal to a specific direction through ABF. This method can improve the transmission efficiency and coverage of the signal. The specific implementation process can refer to the signal receiving process, which will not be repeated here.

[0032] Furthermore, the satellite-borne phased array antenna in the embodiment of the present application has a large array power range and a long satellite-to-ground range, and can realize the function of direct transmission and reception between existing mobile phones and low-orbit near-earth satellite communications. Specifically, when the array size and aperture do not change, the antenna gain is basically unchanged. Since the power consumption in the FDBF design is saved, the transmission power of the unit component can be increased. At the same time, thermal control design is performed to meet the satellite-to-ground link. In satellite-to-ground communications, the downlink rate is relatively high, which is a key link in link design. When the communication bandwidth is 20Mbps, the receiving sensitivity of the mobile phone is -96dB. Through calculation, it is known that the equivalent isotropically radiated power (ERIP) of the direct-connected antenna using the S band should be greater than 70dBm to achieve effective direct connection of the mobile phone. When the mobile phone transmits a signal, due to the higher receiving sensitivity on the satellite, it is easy to achieve the link of the uplink signal.

[0033] For further information, see Figure 3 , Figure 3 Schematic diagram of the structure of the satellite-borne phased array antenna system in the embodiment of the present application. Figure 3 As shown, the satellite-borne phased array antenna system also includes a cavity, a shielding cover and a rear cover. The antenna array 110 can be connected to the cavity by screws. The RF transceiver component conducts heat to the cavity for heat dissipation through contact with the thermal pad. The shielding cover is used to isolate external electromagnetic interference and protect the RF transceiver components inside the phased array from external noise, while also preventing internal signal leakage. The rear cover not only provides mechanical support, but also can dissipate heat for the digital signal processing board 130, so as to realize the thermal control design of the satellite-borne phased array system.

[0034] Furthermore, the antenna array 110 is a low-profile microstrip antenna array.

[0035] Here, the design of the antenna array 110 adopts a low-profile microstrip antenna design concept, which can be subsequently assembled in an integrated manner with the RF transceiver component 120 to reduce the use of conventional connectors. The multi-layer integrated design can effectively reduce the height dimension of the satellite payload structure.

[0036] Specifically, in the embodiment of the present application, the antenna array 110 is designed to have 256 antenna elements 111, the antenna array size is 686×686 mm, the operating frequency band is the S band, and the antenna array 110 is designed using a double-layer microstrip line method. The dielectric constant of the plate is stable, and the height dimension of the satellite payload structure can be effectively reduced.

[0037] Further, any multi-channel integrated module is a multi-channel chip using a system-level package; see Figure 4 , Figure 4 Schematic diagram of the structure of the multi-channel chip in the embodiment of the present application. Figure 4 As shown, a multi-channel chip 200 is encapsulated with a channel allocation chip 210, at least two digital phase shifters 220, at least two single-pole three-throw switches 230, at least two low-noise amplifiers 240, at least two power amplifiers 250 and at least two digital attenuators 260; a first end of the channel allocation chip 210 is connected to the digital signal processing board 130, and a second end of the channel allocation chip 210 includes at least two channels, each of which is connected to a first end of a digital phase shifter 220; a second end of each digital phase shifter 220 is connected to a common end of a single-pole three-throw switch 230; a first output end of each single-pole three-throw switch 230 is connected to an antenna array element 111 of a corresponding channel through a low-noise amplifier 240 and a digital attenuator 260, and a second output end of each single-pole three-throw switch 230 is connected to an antenna array element 111 of a corresponding channel through a power amplifier 250; and a third output end of each single-pole three-throw switch 230 is grounded.

[0038] Specifically, the amplitude and phase control circuit of each channel in the multi-channel chip 200 is completed by the digital phase shifter 220 and the digital attenuator 260. The digital phase shifter 220 provides a 6-bit phase control resolution, a phase shift step of 5.625°, and can cover a complete 360° phase adjustment range. The digital attenuator 260 provides a 5-bit amplitude control resolution, an attenuation step of 0.5dB, and can achieve a single channel 0~15dB amplitude adjustment, and in the entire amplitude adjustment range, the phase change is controlled within 5.625°.

[0039] Optionally, the low noise amplifier 240 may use a low noise amplifier chip with a model number of G2404A01; ​​and the power amplifier 250 may use a power amplifier chip with a model number of WFD020040-P22.

[0040] The multi-channel chip 200 in the embodiment of the present application adopts a system-in-package (SIP) to integrate multiple chips or active and passive devices in one package to meet the diverse communication and radar application requirements. This enables the satellite-borne phased array system to receive beam control information, accurately control the antenna beam pointing, adapt to different working modes, and effectively manage the equivalent isotropic radiated power (EIRP). The multi-channel chip 200 internally supports power amplification and radiation output of RF signals, as well as telemetry functions, to ensure real-time monitoring of the system status. Each beam can be configured independently, supporting beam hopping mode to quickly switch to different ground cells, and staring mode to stably point to a specific geographical location. The satellite-borne phased array system can operate the transmitting beam in equal power density and non-equal power density modes to adapt to different signal coverage requirements, including the ability to point multiple beams to the same area at the same time. In addition, it supports software on-orbit reconstruction, has a self-check function, and can reconstruct or reconfigure the phased array software, even during business service interruptions. All these working modes are controlled by the ground measurement and control system, which sends commands to the satellite platform through the measurement and control link. After processing by the satellite platform, precise control of the payload is achieved to complete complex beam operations, including continuous pointing to a fixed area in staring mode and pointing to multiple surface areas according to a predetermined pattern in beam hopping mode.

[0041] Further, when any multi-channel integrated module 121 is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board 130, the common end of each single-pole triple-throw switch 230 is connected to the first output end.

[0042] Here, in the receiving mode, the common end and the first output end of each single-pole triple-throw switch 230 inside the multi-channel chip 200 are connected. This means that the received signal is first received by the antenna array element 111, then the amplitude is adjusted by the digital attenuator 260, then amplified by the low-noise amplifier 240, and finally sent to the digital signal processing board 130 for digital beamforming and further processing after phase shifting by the digital phase shifter 220 at the common end through the first output end of the single-pole triple-throw switch.

[0043] Furthermore, when any multi-channel integrated module 121 is used to perform analog beamforming on the received third analog signal, generate at least two fourth analog signals, and send at least two fourth analog signals to the corresponding antenna array element 111, the common end and the second output end of each single-pole triple-throw switch 230 are connected.

[0044] Here, in the transmission mode, if the multi-channel integrated module 121 needs to perform analog beamforming on the received third analog signal, generate at least two fourth analog signals, and send these signals to the corresponding antenna array element 111, the common end and the second output end of each single-pole triple-throw switch 230 inside the multi-channel chip 200 are connected. This allows the signal to be additionally amplified by the power amplifier 250 after phase shifting by the digital phase shifter 220 to meet the transmission requirements.

[0045] Furthermore, when any multi-channel integrated module 121 is not working, the common end of each single-pole triple-throw switch 230 is connected to the third output end.

[0046] Here, when the multi-channel integrated module 121 is not in operation, in order to ensure system stability and prevent signal interference, the common terminal and the third output terminal of each single-pole triple-throw switch 230 are connected to avoid unnecessary signal transmission or interference.

[0047] Furthermore, the digital signal processing board is an FPGA integrated with at least two dual-channel integrated analog-to-digital conversion chips.

[0048] In the embodiment of the present application, the digital signal processing board 130 adopts a multi-channel low-power digital sampling device integrated design with good synchronization consistency. The field-programmable gate array (FPGA) is loaded with a developed digital beam processing program to realize the effective application of multiple beams.

[0049] Optionally, the dual-channel integrated analog-to-digital conversion chip may be a dual-channel integrated analog-to-digital conversion chip of model ADVR9009; and the FPGA may be a K7 series FPGA.

[0050] Furthermore, the digital signal processing board 130 is also integrated with at least one of the following interfaces: CAN bus interface, GTH data interface, RS422 interface and LVDS interface. Among them, the controller area network (CAN) bus interface is used to connect various electronic control units; the GTH (Gigabit Transceivers) data interface is a high-speed serial interface used for high-speed data transmission in FPGA (field programmable gate array), supporting a variety of high-speed serial transmission protocols, such as PCIe, 10 Gigabit network, SATA, etc., suitable for occasions requiring high-speed data transmission; RS422 is a balanced differential transmission standard used to achieve long-distance and high-speed serial communication. The RS422 interface supports full-duplex communication and can connect multiple receiving nodes; the low voltage differential signaling (LVDS) interface is used for high-speed data transmission, using low voltage swing to transmit data through differential on two PCB traces or a pair of balanced cables, with the characteristics of low power consumption, low noise and low bit error rate. In this way, the interface resources are rich, the interface design has a wider range of application, and the digital signal processing board 130 integrates a variety of interfaces to adapt to a variety of application scenarios.

[0051] For further information, see Figure 5 , Figure 5 This is a second functional module diagram of a satellite-borne phased array antenna system provided in an embodiment of the present application. Figure 5 As shown, the satellite-borne phased array antenna system 100 further includes a power module 140 , which is electrically connected to the RF transceiver assembly 120 and the digital signal processing board 130 , respectively.

[0052] Among them, the power module 140 is used to power the RF transceiver component 120 and the digital signal processing board 130. In the embodiment of the present application, the power module 140 is a DCDC power supply, which is used to provide secondary power to the RF transceiver component 120 and the digital signal processing board 130. The input of the power module 140 is +28V, and it can output -5V, +5V, +12V and other power supply requirements. Further, the power module 140 can be integrated into the digital signal processing board 130, and heat is dissipated through the rear cover plate connected to the digital signal processing board 130.

[0053] The embodiment of the present application provides a satellite-borne phased array antenna system, including an antenna array, a radio frequency transceiver component and a digital signal processing board; the antenna array includes at least two antenna array elements; the radio frequency transceiver component includes at least one multi-channel integrated module; the first end of the multi-channel integrated module is communicatively connected to at least two antenna array elements, and the second end of the multi-channel integrated module is communicatively connected to the digital signal processing board; wherein any antenna array element is used to convert the received electromagnetic wave signal into a first analog signal and send it to the corresponding multi-channel integrated module; any multi-channel integrated module is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board; the digital signal processing board is used to convert each received second analog signal into a corresponding first digital signal, and perform digital beamforming on each first digital signal to obtain a target received signal. In this way, the number of channels of the system is reduced by realizing secondary beam synthesis through radio frequency multi-channel integration, thereby improving the communication efficiency of the satellite-borne phased array antenna system.

[0054] In the embodiments provided in the present application, it should be understood that the disclosed system can be implemented in other ways. The system embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some communication interface, device or unit, which can be electrical, mechanical or other forms.

[0055] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0056] In addition, each functional unit in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0057] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. They should all be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A satellite-borne phased array antenna system, characterized in that: The satellite-borne phased array antenna system includes: an antenna array, a radio frequency transceiver component and a digital signal processing board; the antenna array includes at least two antenna array elements; the radio frequency transceiver component includes at least one multi-channel integrated module; the first end of the multi-channel integrated module is communicatively connected to at least two antenna array elements, and the second end of the multi-channel integrated module is communicatively connected to the digital signal processing board; wherein, Any of the antenna array elements is used to convert the received electromagnetic wave signal into a first analog signal and send it to the corresponding multi-channel integrated module; Any of the multi-channel integrated modules is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board; The digital signal processing board is used to convert each received second analog signal into a corresponding first digital signal, and perform digital beamforming on each first digital signal to obtain a target received signal.

2. The satellite-borne phased array antenna system according to claim 1, characterized in that: The digital signal processing board is further used to perform digital beamforming on the target transmission signal to obtain at least one second digital signal, and convert the at least one second digital signal into a corresponding third analog signal and send it to the corresponding multi-channel integrated module; Any of the multi-channel integrated modules is further used to perform analog beamforming on the received third analog signal to generate at least two fourth analog signals, and send the at least two fourth analog signals to corresponding antenna array elements; Any of the antenna array elements is further used to convert the received fourth analog signal into an electromagnetic wave signal and transmit it to a corresponding spatial direction.

3. The satellite-borne phased array antenna system according to claim 1, characterized in that: The antenna array is a low-profile microstrip antenna array.

4. The satellite-borne phased array antenna system according to claim 2, characterized in that: Any of the multi-channel integrated modules is a multi-channel chip using system-level packaging; the multi-channel chip is packaged with a channel allocation chip, at least two digital phase shifters, at least two single-pole three-throw switches, at least two low-noise amplifiers, at least two power amplifiers and at least two digital attenuators; the first end of the channel allocation chip is connected to the digital signal processing board, and the second end of the channel allocation chip includes at least two channels, each channel is connected to the first end of a digital phase shifter; the second end of each digital phase shifter is connected to the common end of a single-pole three-throw switch; the first output end of each single-pole three-throw switch is connected to the antenna array element of the corresponding channel through a low-noise amplifier and a digital attenuator, and the second output end of each single-pole three-throw switch is connected to the antenna array element of the corresponding channel through a power amplifier; the third output end of each single-pole three-throw switch is grounded.

5. The satellite-borne phased array antenna system according to claim 4, characterized in that: When any of the multi-channel integrated modules is used to perform analog beamforming on each received first analog signal, generate a second analog signal and send it to the digital signal processing board, the common end of each single-pole triple-throw switch is connected to the first output end.

6. The satellite-borne phased array antenna system according to claim 4, characterized in that: When any of the multi-channel integrated modules is used to perform analog beamforming on the received third analog signal, generate at least two fourth analog signals, and send the at least two fourth analog signals to the corresponding antenna array elements, the common end and the second output end of each single-pole triple-throw switch are connected.

7. The satellite-borne phased array antenna system according to claim 4, characterized in that: When any of the multi-channel integrated modules is not working, the common end of each single-pole triple-throw switch is connected to the third output end.

8. The satellite-borne phased array antenna system according to claim 1, characterized in that: The digital signal processing board is an FPGA integrated with at least two dual-channel integrated analog-to-digital conversion chips.

9. The satellite-borne phased array antenna system according to claim 8, characterized in that: The digital signal processing board is also integrated with at least one of the following interfaces: CAN bus interface, GTH data interface, RS422 interface and LVDS interface.

10. The satellite-borne phased array antenna system according to claim 1, characterized in that: The satellite-borne phased array antenna system also includes a power module; the power module is electrically connected to the RF transceiver component and the digital signal processing board respectively; wherein, The power module is used to supply power to the radio frequency transceiver component and the digital signal processing board.

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