CN116980001A - Novel architecture layout design method for integrated load of formation satellite interference SAR - Google Patents
Novel architecture layout design method for integrated load of formation satellite interference SAR Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9021—SAR image post-processing techniques
- G01S13/9023—SAR image post-processing techniques combined with interferometric techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0682—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using phase diversity (e.g. phase sweeping)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/084—Equal gain combining, only phase adjustments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18515—Transmission equipment in satellites or space-based relays
Abstract
The application relates to a novel design method of an integrated load architecture layout of formation satellite interference SAR, wherein an antenna sub-board is integrated into a whole board, the whole board comprises a sub-array network and a power divider, when an array surface is in a transmitting state, microwave signals sequentially pass through a 1:2 power divider, a driving amplifier, an attenuator, a circulator, a 1:3 power divider, a 1:8 power divider, a 1:6 power divider, a delay amplifying component, a sub-array network 1:2 power divider and a T/R component input end, and the microwave signals are amplified to a radiation unit to a specified space; when the array surface is in a receiving state, signals sequentially pass through the T/R component, the subarray network 1:2 power divider, the delay amplifying component, the subarray network 1:6 power divider, the 1:8 power divider, the 1:3 power divider, the circulator, the 1:2 power divider and the cabin receiver. The application can realize the emission without unfolding the antenna, improves the reliability of the system, and solves the key problem of abrupt phase change between boards caused by unfolding the antenna array surface.
Description
Technical Field
The application relates to the field of satellite-borne microwave imaging radars, in particular to a novel architecture layout design method for integrated loading of formation satellite interference SAR.
Background
The formation satellite interference SAR antenna is generally designed in an antenna folding mode, satellite envelope minimization can be achieved through folding, however, the antenna can definitely introduce phase change caused by expansion disturbance along with the flexible cable in the expansion process, and finally interference accuracy is affected.
Aiming at the layout design of the integrated load architecture, the related literature in recent years is searched by everyone, and the comparison information is obtained.
Jiang Shouli et al propose a novel design method of a low-profile Synthetic Aperture Radar (SAR) active phased array antenna in a research of space-borne SAR functional structure integrated antenna technology, and through a multifunctional structure integrated antenna technology, high-density interconnection, novel functional materials and the like are adopted to carry out modularized and light system-level integrated design, and the system functions are combined with the antenna structure, so that the volume of the SAR antenna is greatly reduced, and the internal available space is increased; however, the novel antenna design mode is not constructed, and the phase change caused by antenna unfolding is not considered.
The Fudaxing et al propose the technological design thought of system control in the key technology for manufacturing the space-borne SAR structural function integrated antenna, comprehensively consider a plurality of targeted technological measures from parts, single machines and modules to an antenna system, and deeply study, break through key technologies such as vertical blind insertion connection of an active comprehensive module, small-stress accurate assembly of an antenna daughter board, accurate manufacture of an antenna radiating unit and the like, and successfully realize the development of the space-borne integrated high-density integrated antenna; but it does not address the phase change of the antenna deployment.
Aiming at the conventional formation satellite interference SAR load, a folding design mode is generally adopted, and a novel formation satellite interference SAR integrated load architecture layout design method is required to be provided so as to solve the disturbance phase change caused by antenna folding.
Disclosure of Invention
The application provides a novel architecture layout design method for integrated load of formation satellite interference SAR (synthetic aperture radar) for solving the prior technical problems.
The application comprises the following specific contents: a novel design method of an integrated load structure layout of formation satellite interference SAR, an antenna sub-board is integrated into a whole board, which comprises a sub-array network and a power divider,
when the array surface is in a transmitting state, the signal flow is as follows: microwave signals generated by a linear frequency modulation source of the equipment in the cabin are transmitted to a driving amplifier through a 1:2 power divider, distributed to a module through an attenuator and a circulator, transmitted to a 1:3 power divider through an interconnection cable, transmitted to a 1:6 power divider of a subarray network through a 1:8 power divider, amplified through a delay amplifying assembly, distributed to an input end of a T/R assembly, and amplified to a radiation unit to a designated space;
when the array surface is in a receiving state, the signal flow is as follows: each radiation antenna unit receives echo signals, and after being amplified by a T/R assembly, synthesized by a subarray network 1:2 power divider and amplified by a delay amplifying assembly, the echo signals are transmitted to an in-cabin receiver through a subarray network 1:6 power divider, a subarray network 1:8 power divider and a subarray network 1:3 power divider, and then transmitted to the in-cabin receiver through a circulator and a subarray network 1:2 power divider.
Further, the scaling link signal flow is: the calibration system signal is transmitted to the 1:2 power divider, then passes through the 1:3 power divider to the 1:8 power divider, and then passes through the subarray network 1:25 calibration power divider to the T/R component monitoring channel.
Further, the subarray network comprises a multi-layer laminated printed board, the radio frequency network in the subarray network comprises 1:6 power dividers and 6 1:2 power dividers of the transceiver network, and 1:1 of the scaling network: 25 power divider, wherein 1:25 power splitters are arranged on the right side of the printed board, and 1:6 calibration power splitters and 1: the 25 power dividers are arranged on the same layer, and the 1:2 power dividers are arranged in another layer of printed board.
Further, a radio frequency feed network, a low frequency branching plate and +28V and + -5V power supplies are arranged on the printed board, copper is paved in the multilayer printed board, a plurality of low frequency connectors and radio frequency connectors are welded on the subarray network, the low frequency connectors and the radio frequency connectors are fixed on the circuit board in a welding mode, positioning holes are further formed in two sides of the low frequency connectors, and the low frequency connectors are fastened by matching with positioning screws.
Furthermore, a plurality of grooves are formed in the circuit board, and the grooves are located outside the installation positions of the low-frequency connector and the radio-frequency connector.
The application has the beneficial effects that: through the integral design of the array surface, the non-unfolding design of the antenna array surface is realized: the antenna array plane antenna can realize transmission without unfolding, improves the reliability of the system, and solves the key problem of abrupt phase change between plates caused by unfolding of the antenna array plane.
Drawings
The following description of the embodiments of the application is further defined by reference to the accompanying drawings.
FIG. 1 is a block diagram of a conventional design of an array plane of a formation satellite interferometric SAR antenna;
FIG. 2 is a schematic diagram of the whole array operation of the method for designing the layout of the integrated antenna architecture of the formation satellite interference SAR of the present application;
fig. 3 is a schematic diagram of a transmit chain;
fig. 4 is a schematic diagram of a receive link;
FIG. 5 is a scaled link schematic
FIG. 6 is a schematic diagram of a subarray network three-dimensional model;
FIG. 7 is a chart of the phase between certain formation satellite SAR gather status plates;
FIG. 8 is a chart of the phase between plates of a certain formation satellite SAR deployment state;
fig. 9 is a phase of a new formation satellite SAR antenna.
The device comprises a low-frequency connector 1, a low-frequency connector 2, a groove, a positioning hole 3, a radio-frequency connector 4 and a radio-frequency connector.
Description of the embodiments
The application provides a novel architecture layout design method for integrated load of formation satellite interference SAR. The method realizes the novel radio frequency network design by redesigning the design method of the integrated load architecture layout, and solves the key problem of abrupt phase change between boards caused by the expansion of the load array surface.
Conventional formation satellite interferometric SAR loading typically employs a folded approach in design to achieve system envelope minimization, as shown in fig. 1. The two sub-boards are connected by a hinge, the sub-boards are folded into pi-type during transmitting, and the pi-type is unfolded in an on-orbit mode, and the form can reduce the system envelope, but inevitably brings about the key problem of abrupt phase change between boards caused by antenna array surface unfolding.
Aiming at the problem, the application designs a novel integrated load architecture layout of the formation satellite interference SAR, and the layout integrates the antenna sub-boards needing to be unfolded into a whole board through the design of a comprehensive network.
The application relates to a formation satellite interference SAR integrated antenna architecture layout design method, which is shown in figure 2, wherein the design consists of a subarray network, a 1:8 power divider, a 1:3 power divider, a 1:2 power divider and other single machines, and the main function is to realize the transmission and distribution of full array plane radio frequency signals.
As shown in fig. 3, during transmitting, microwave excitation signals of the equipment in the cabin are amplified by the driving amplifier through the 1:2 power divider, then transmitted to the 1:3 power divider through the attenuator and the circulator by the radio frequency cable, distributed to the main feed 1:6 power divider of the subarray network through the 1:8 power divider, further amplified by the delay amplifying component and sent to the 1:2 power divider of the subarray network, distributed by the 1:2 power divider of the subarray network, and then input excitation signals to the T/R component, and the T/R component further amplifies microwave signals and radiates to space through the radiation antenna unit.
As shown in fig. 4, when receiving, each radiation antenna unit receives an echo signal, and after amplifying by a T/R component, synthesizing by a subarray network 1:2 power divider and amplifying by a delay amplifying component, the echo signal is transmitted to a cabin 1:2 power divider by a circulator and then a radio frequency cable through a subarray network 1:6 power divider, a 1:8 power divider and a 1:3 power divider, and then is sent to a cabin receiver.
The design method of the application also comprises the design of the calibration link, the internal calibration network is used as a component part of the internal calibration system to finish the functions of calibrating the transmitting power, the receiving channel gain and the system gain of the array plane T/R component under the cooperation of other equipment of the SAR system, and the satellite can be used for detecting the appointed position in the in-orbit flight stage. As shown in fig. 5, the scaled link signal flow is: the calibration system signal is transmitted to the 1:2 power divider, then passes through the 1:3 power divider to the 1:8 power divider, and then passes through the subarray network 1:25 calibration power divider to the T/R component monitoring channel.
The non-folded formation satellite interference SAR integrated antenna architecture layout is realized through the link design, and in order to meet the weight requirement, the application simultaneously develops a lightweight design.
The radio frequency network in the subarray network comprises 1:6 power splitters and 6 1:2 power splitters of the transceiver network, and 1:1 of the scaling network: 25 power divider. Because the 1:6 power divider and the 1:2 power divider are crossed, the power divider and the 1:6 power divider cannot be arranged in the same layer of printed board, and if one layer is considered to be independently arranged, the radio frequency circuit needs 3 layers of strip lines. Thus, for scaling network 1:25 are arranged on the right side of the printed board, so that the 1:6 scaling power divider and 1: the 25 power dividers are arranged on the same layer, and the network function is realized by using the least number of layers of printed boards, so that the aim of weight reduction is fulfilled. In addition, the weight increasing and decreasing groove is added at a proper position, and a certain weight can be reduced.
As shown in fig. 6, for the structural design, the subarray network is composed of a multi-layer laminated circuit board, including a radio frequency feed network, a low-frequency branching board and power supplies of three varieties of +28v and +/-5V, and copper layers of the power supply varieties are realized by adopting large-area copper paving in the multi-layer printed board. A plurality of low frequency connectors 1 and radio frequency connectors 4 are welded on the subarray network, all connectors are fixed on a circuit board in a welding mode, wherein the low frequency connectors 1 are additionally provided with two side mounting positioning holes 3, and the low frequency connectors 1 are fastened by matching with positioning screws, so that the reliability is improved, and the welding precision of the low frequency connectors is controlled. Considering the design of subarray network lightweight, on the premise of not influencing the subarray network function and reliability, the weight of the subarray network is reduced by digging a groove 2 in the circuit board, and the weight reduction area is respectively positioned outside the installation positions of a plurality of low-frequency connectors and radio frequency connectors as shown in fig. 6, so that the weight reduction is finally realized by about 6%.
Taking certain two types of formation satellite interference SAR as an example, the design method provided by the application is used for carrying out actual comparison analysis:
1. phase test under traditional load furled state
And (3) carrying out an inter-plate phase test on the SAR of a certain formation satellite in a furled state, recording echo data by a receiver, and carrying out pulse pressure to obtain a phase value phi 1 as shown in fig. 7.
2. Phase test under traditional load expansion state
And (3) carrying out an inter-plate phase test on the SAR of a certain formation satellite in an unfolding state, recording echo data by a receiver, and carrying out pulse pressure to obtain a phase value phi 2 as shown in fig. 8.
As can be seen from the above illustration, the phases of the panels a, B, and C are greatly changed between the front and rear plates before the antenna is unfolded, which are all caused by the antenna unfolding.
3. Novel load phase test
The novel load designed according to the design method of the application is subjected to phase test, and as the antenna array surface has only one panel, the phase change caused by folding and unfolding does not exist, the receiver records echo data to perform pulse pressure, and the phase value phi 3 is obtained as shown in fig. 9.
Through comparison of the diagrams, the layout provided by the design method solves the problem of phase change between boards caused by antenna array surface expansion.
The novel design method of the integrated load architecture layout of the formation satellite interference SAR realizes the novel radio frequency network design, and the method realizes (1) the non-unfolding design of the antenna array surface: the antenna array plane antenna can realize transmission without unfolding, improves the reliability of the system, and solves the key problem of abrupt phase change between plates caused by unfolding of the antenna array plane. (2) lightweight design of antenna: through rationalized distribution of layout, the lightweight design of the antenna is realized. (3) The reliability problem of formation satellite interference SAR caused by array surface expansion is solved, the problem of inter-plate phase change caused by antenna array surface expansion is solved, and the lightweight design of the antenna is realized.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The foregoing description is only of a preferred embodiment of the application, which can be practiced in many other ways than as described herein, so that the application is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present application without departing from the technical solution of the present application still falls within the scope of the technical solution of the present application.
Claims (5)
1. A novel architecture layout design method for formation satellite interference SAR integrated load is characterized in that: the antenna sub-board is integrated into a whole board, comprising a sub-array network and a power divider,
when the array surface is in a transmitting state, the signal flow is as follows: microwave signals generated by a linear frequency modulation source of the equipment in the cabin are transmitted to a driving amplifier through a 1:2 power divider, distributed to a module through an attenuator and a circulator, transmitted to a 1:3 power divider through an interconnection cable, transmitted to a 1:6 power divider of a subarray network through a 1:8 power divider, amplified through a delay amplifying assembly, distributed to an input end of a T/R assembly, and amplified to a radiation unit to a designated space;
when the array surface is in a receiving state, the signal flow is as follows: each radiation antenna unit receives echo signals, and after being amplified by a T/R assembly, synthesized by a subarray network 1:2 power divider and amplified by a delay amplifying assembly, the echo signals are transmitted to an in-cabin receiver through a subarray network 1:6 power divider, a subarray network 1:8 power divider and a subarray network 1:3 power divider, and then transmitted to the in-cabin receiver through a circulator and a subarray network 1:2 power divider.
2. The method for designing the integrated load new architecture layout of the formation satellite interference SAR according to claim 1, wherein the method comprises the following steps: the scaling link signal flow is: the calibration system signal is transmitted to the 1:2 power divider, then passes through the 1:3 power divider to the 1:8 power divider, and then passes through the subarray network 1:25 calibration power divider to the T/R component monitoring channel.
3. The method for designing the integrated load new architecture layout of the formation satellite interference SAR according to claim 1, wherein the method comprises the following steps: the subarray network comprises a multilayer laminated printed board, the radio frequency network in the subarray network comprises 1:6 power dividers and 6 1:2 power dividers of the transceiver network, and 1:1 of the scaling network: 25 power divider, wherein 1:25 power splitters are arranged on the right side of the printed board, and 1:6 calibration power splitters and 1: the 25 power dividers are arranged on the same layer, and the 1:2 power dividers are arranged in another layer of printed board.
4. The method for designing the integrated load new architecture layout of the formation satellite interference SAR according to claim 1, wherein the method comprises the following steps: the printed board is provided with a radio frequency feed network, a low-frequency branching board and +28V and + -5V power supplies, copper is paved in the multilayer printed board, a plurality of low-frequency connectors and radio frequency connectors are welded on the subarray network, the low-frequency connectors and the radio frequency connectors are fixed on the circuit board in a welding mode, positioning holes are further formed in two sides of the low-frequency connectors, and the low-frequency connectors are fastened by matching with positioning screws.
5. The method for designing the integrated load new architecture layout of the formation satellite interferometric SAR according to claim 4, wherein the method comprises the following steps: a plurality of grooves are formed in the circuit board and are positioned outside the mounting positions of the low-frequency connector and the radio-frequency connector.
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| CN202311230686.9A CN116980001B (en) | 2023-09-22 | 2023-09-22 | Novel architecture layout design method for integrated load of formation satellite interference SAR |
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