Satellite-borne full-temperature multi-channel internal calibration method

Abstract

The invention discloses a satellite-borne full-temperature multi-channel internal calibration method. The method comprises the following steps: obtaining final preset characteristics of a processor at each temperature; the final preset characteristics of the multi-channel transmitting module at each temperature are obtained; the final preset characteristics of the multi-channel circulator at each temperature are obtained; the final preset characteristics of the multi-channel coupler at each temperature are obtained; the final preset characteristics of the multi-channel receiving module at each temperature are obtained; the final preset characteristics of the internal calibration system at each temperature are obtained; transmitting calibration link characteristics are obtained; receiving calibration link characteristics are obtained; obtaining reference calibration link characteristics; and obtaining a transceiving link characteristic according to the transmitting calibration link characteristic, the receiving calibration link characteristic and the reference calibration link characteristic. According to the method, the problem that the characteristics of the multi-channel full transceiving link cannot be completely obtained in the traditional calibration process is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of space microwave remote sensing, and in particular relates to a satellite-borne full-temperature multi-channel internal calibration method. Background Art

[0002] With the development of active high-power radar in bandwidth and resolution, the bandwidth of the transmitted signal is getting larger and larger, and the transmission power is getting higher and higher. In addition, high resolution and wide bandwidth have become an important research direction of the new generation of spaceborne SAR systems. On this basis, the realization of moving target detection has also become an important application in the military field. Therefore, multi-channel spaceborne SAR systems have become an inevitable choice. The higher power of the system and the complex system layout lead to extremely unstable temperature conditions in the entire system during operation. Specifically, there are relatively discrete temperature change trends between single machines and channels. The working characteristics of the SAR system make it impossible for the system to complete the calibration work in real time during the imaging process. In addition, the high resolution and moving target recognition mode also have high precision requirements for the amplitude and phase calibration of the system. It is difficult to complete the high-precision system amplitude and phase characteristic calibration for such a high-power system with the current calibration method. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a satellite-borne full-temperature multi-channel internal calibration method, and to solve the problem that the multi-channel full transceiver link characteristics cannot be completely obtained in the traditional calibration process.

[0004] The object of the present invention is achieved through the following technical solutions: A satellite-borne full-temperature multi-channel internal calibration method, comprising: obtaining the characteristics of the processor at each final preset temperature; obtaining the characteristics of the multi-channel transmitting module at each final preset temperature; obtaining the characteristics of the multi-channel circulator at each final preset temperature; obtaining the characteristics of the multi-channel coupler at each final preset temperature; obtaining the characteristics of the multi-channel receiving module at each final preset temperature; obtaining the characteristics of the internal calibration system at each final preset temperature; according to the characteristics of the processor at each final preset temperature, the characteristics of the multi-channel transmitting module at each final preset temperature, the characteristics of the multi-channel circulator at each final preset temperature, and the characteristics of the multi-channel coupler at each final preset temperature and the characteristics of the multi-channel receiving module at each final preset temperature to obtain the transmission calibration link characteristics; the reception calibration link characteristics are obtained according to the characteristics of the processor at each final preset temperature, the characteristics of the internal calibration system at each final preset temperature, the characteristics of the multi-channel circulator at each final preset temperature, the characteristics of the multi-channel coupler at each final preset temperature and the characteristics of the multi-channel receiving module at each final preset temperature; the reference calibration link characteristics are obtained according to the characteristics of the processor at each final preset temperature, the characteristics of the internal calibration system at each final preset temperature and the characteristics of the multi-channel receiving module at each final preset temperature; the transceiver link characteristics are obtained according to the transmission calibration link characteristics, the receiving calibration link characteristics and the reference calibration link characteristics.

[0005] In the above-mentioned on-board full-temperature multi-channel internal calibration method, obtaining the final processor characteristics at each preset temperature includes the following steps: Step S11: placing the processor in an incubator and adjusting the incubator temperature to each preset temperature; Step S12: using a vector network analyzer to collect and obtain the characteristics of the processor at each preset temperature; Step S13: repeating step S12 until the difference in the characteristics of the processor at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the processor at each preset temperature obtained for the last time, that is, the final characteristics of the processor at each preset temperature.

[0006] In the above-mentioned satellite-borne full-temperature multi-channel internal calibration method, obtaining the final characteristics of the multi-channel transmission module at each preset temperature includes the following steps: Step S21: placing the multi-channel transmission module in an incubator, and adjusting the incubator temperature to each preset temperature; Step S22: using a vector network analyzer to collect and obtain the characteristics of the multi-channel transmission module at each preset temperature; Step S23: repeating step S22 until the characteristic difference of the multi-channel transmission module at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel transmission module at each preset temperature obtained for the last time, that is, the final characteristics of the multi-channel transmission module at each preset temperature.

[0007] In the above-mentioned satellite-borne full-temperature multi-channel internal calibration method, obtaining the final characteristics of the multi-channel circulator at each preset temperature includes the following steps: Step S31: placing the multi-channel circulator in an incubator, and adjusting the incubator temperature to each preset temperature; Step S32: using a vector network analyzer to collect and obtain the characteristics of the multi-channel circulator at each preset temperature; Step S33: repeating step S32 until the difference in the characteristics of the multi-channel circulator at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel circulator at each preset temperature obtained for the last time, that is, the final characteristics of the multi-channel circulator at each preset temperature.

[0008] In the above-mentioned satellite-borne full-temperature multi-channel internal calibration method, obtaining the final characteristics of the multi-channel coupler at each preset temperature includes the following steps: Step S41: placing the multi-channel coupler in an incubator, and adjusting the incubator temperature to each preset temperature; Step S42: using a vector network analyzer to collect and obtain the characteristics of the multi-channel coupler at each preset temperature; Step S43: repeating step S42 until the characteristic difference of the multi-channel coupler at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel coupler at each preset temperature obtained for the last time, that is, the final characteristics of the multi-channel coupler at each preset temperature.

[0009] In the above-mentioned satellite-borne full-temperature multi-channel internal calibration method, obtaining the final characteristics of the multi-channel receiving module at each preset temperature includes the following steps: Step S51: placing the multi-channel receiving module in an incubator, and adjusting the incubator temperature to each preset temperature; Step S52: using a vector network analyzer to collect and obtain the characteristics of the multi-channel receiving module at each preset temperature; Step S53: repeating step S52 until the characteristic difference of the multi-channel receiving module at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel receiving module at each preset temperature obtained for the last time, that is, the final characteristics of the multi-channel receiving module at each preset temperature.

[0010] In the above-mentioned satellite-borne full-temperature multi-channel internal calibration method, obtaining the final characteristics of the internal calibration system at each preset temperature includes the following steps: Step S61: placing the internal calibration system in an incubator, and adjusting the incubator temperature to each preset temperature; Step S62: using a vector network analyzer to collect and obtain the characteristics of the internal calibration system at each preset temperature; Step S63: repeating step S62 until the difference in the characteristics of the internal calibration system at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the internal calibration system at each preset temperature obtained for the last time, i.e., the final characteristics of the internal calibration system at each preset temperature.

[0011] In the above-mentioned on-board full-temperature multi-channel internal calibration method, the characteristics include amplitude and phase.

[0012] In the above-mentioned onboard full-temperature multi-channel internal calibration method, the transmission calibration link characteristics are obtained by the following formula:

[0013] S 发射定标链路 =S 处理器 +S 多通道发射模块 +S 多通道环形器 +S 多通道耦合器 +S 多通道接收模块 ;

[0014] Among them, S 发射定标链路 To calibrate the link characteristics for transmission, S 处理器 The final processor characteristics at each preset temperature, S 多通道发射模块 The characteristics of the multi-channel transmitter module at each final preset temperature, S 多通道环形器 The final characteristics of the multi-channel circulator at each preset temperature, S 多通道耦合器 The final characteristics of the multi-channel coupler at each preset temperature, S 多通道接收模块 Characterization of the multi-channel receiver module at each temperature for the final preset.

[0015] In the above-mentioned onboard full-temperature multi-channel internal calibration method, the receiving calibration link characteristics are obtained by the following formula:

[0016] S 接收定标链路 =S 处理器 +S 内定标系统 +S 多通道环形器 +S 多通道耦合器 +S 多通道接收模块 ;

[0017] The reference calibration link characteristics are obtained by the following formula:

[0018] S 参考定标链路 =S 处理器 +S 内定标系统 +S 多通道接收模块 ;

[0019] The transmit and receive link characteristics are obtained through the following formula:

[0020] S 收发链路 =S 发射定标链路 +S 接收定标链路 -S 参考定标链路 ;

[0021] Among them, S 收发链路 is the transmit and receive link characteristic, S 参考定标链路 is the reference calibration link characteristic, S 接收定标链路 To calibrate the link characteristics for transmission, S 处理器 The final processor characteristics at each preset temperature, S内定标系统 The characteristic of the internal calibration system at each final preset temperature, S 多通道环形器 The final characteristics of the multi-channel circulator at each preset temperature, S 多通道耦合器 The final characteristics of the multi-channel coupler at each preset temperature, S 多通道接收模块 Characterization of the multi-channel receiver module at each temperature for the final preset.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention solves the problem that the multi-channel full transceiver link cannot be completely obtained in the traditional calibration process; at the same time, it solves the problem that the calibration results are inaccurate due to system temperature changes under multi-mode and multi-working conditions, which in turn affects the ultra-high resolution SAR imaging effect and the accuracy of moving target recognition. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0025] Figure 1 It is a flow chart of a satellite-borne full-temperature multi-channel internal calibration method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Figure 1 1 is a flow chart of a satellite-borne full-temperature multi-channel internal calibration method provided by an embodiment of the present invention. Figure 1 As shown, the onboard full-temperature multi-channel internal calibration method includes:

[0028] Get the final characteristics of the processor at each preset temperature;

[0029] Obtain the characteristics of the multi-channel transmission module at each final preset temperature;

[0030] Obtain the characteristics of the multi-channel circulator at each final preset temperature;

[0031] Obtain the characteristics of the multi-channel coupler at each final preset temperature;

[0032] Obtain the characteristics of the multi-channel receiving module at each final preset temperature;

[0033] Obtain the characteristics of the internal calibration system at each final preset temperature;

[0034] Obtaining transmission calibration link characteristics according to characteristics of the processor at each final preset temperature, characteristics of the multi-channel transmission module at each final preset temperature, characteristics of the multi-channel circulator at each final preset temperature, characteristics of the multi-channel coupler at each final preset temperature, and characteristics of the multi-channel receiving module at each final preset temperature;

[0035] Obtaining receiving calibration link characteristics according to characteristics of the processor at each final preset temperature, characteristics of the internal calibration system at each final preset temperature, characteristics of the multi-channel circulator at each final preset temperature, characteristics of the multi-channel coupler at each final preset temperature, and characteristics of the multi-channel receiving module at each final preset temperature;

[0036] Obtaining reference calibration link characteristics according to characteristics of the processor at each final preset temperature, characteristics of the internal calibration system at each final preset temperature, and characteristics of the multi-channel receiving module at each final preset temperature;

[0037] The transceiver link characteristics are obtained according to the transmission calibration link characteristics, the reception calibration link characteristics and the reference calibration link characteristics.

[0038] Obtaining the final characteristics of the processor at each preset temperature includes the following steps: Step S11: placing the processor in a temperature box, adjusting the temperature of the temperature box to each preset temperature; Step S12: using a vector network analyzer to collect and obtain the characteristics of the processor at each preset temperature; Step S13: repeating step S12 until the difference in the characteristics of the processor at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the processor at each preset temperature obtained at the last time, that is, the final characteristics of the processor at each preset temperature. Among them, the difference in the characteristics of the processor at each preset temperature obtained by the last two tests meets the preset requirements: the phase difference of the processor at each preset temperature obtained by the last two tests is <2 degrees and the amplitude difference of the processor at each preset temperature obtained by the last two tests is <0.2dB.

[0039] Obtaining the final characteristics of the multi-channel transmitting module at each preset temperature includes the following steps: Step S21: placing the multi-channel transmitting module in an incubator, and adjusting the incubator temperature to each preset temperature; Step S22: using a vector network analyzer to collect and obtain the characteristics of the multi-channel transmitting module at each preset temperature; Step S23: repeating step S22 until the characteristic difference of the multi-channel transmitting module at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel transmitting module at each preset temperature obtained for the last time, i.e., the final characteristics of the multi-channel transmitting module at each preset temperature. Among them, the characteristic difference of the multi-channel transmitting module at each preset temperature obtained by the last two tests meets the preset requirements as follows: the phase difference of the multi-channel transmitting module at each preset temperature obtained by the last two tests is <2 degrees and the amplitude difference of the multi-channel transmitting module at each preset temperature obtained by the last two tests is <0.2dB.

[0040] Obtaining the final characteristics of the multi-channel circulator at each preset temperature includes the following steps: Step S31: placing the multi-channel circulator in an incubator, and adjusting the incubator temperature to each preset temperature; Step S32: using a vector network analyzer to collect and obtain the characteristics of the multi-channel circulator at each preset temperature; Step S33: repeating step S32 until the characteristic difference of the multi-channel circulator at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel circulator at each preset temperature obtained for the last time, i.e., the final characteristics of the multi-channel circulator at each preset temperature. Among them, the characteristic difference of the multi-channel circulator at each preset temperature obtained by the last two tests meets the preset requirements as follows: the phase difference of the multi-channel circulator at each preset temperature obtained by the last two tests is <2 degrees and the amplitude difference of the multi-channel circulator at each preset temperature obtained by the last two tests is <0.2dB.

[0041] Obtaining the final characteristics of the multi-channel coupler at each preset temperature includes the following steps: Step S41: placing the multi-channel coupler in an incubator, and adjusting the incubator temperature to each preset temperature; Step S42: using a vector network analyzer to collect and obtain the characteristics of the multi-channel coupler at each preset temperature; Step S43: repeating step S42 until the characteristic difference of the multi-channel coupler at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel coupler at each preset temperature obtained for the last time, i.e., the final characteristics of the multi-channel coupler at each preset temperature. Among them, the characteristic difference of the multi-channel coupler at each preset temperature obtained by the last two tests meets the preset requirements as follows: the phase difference of the multi-channel coupler at each preset temperature obtained by the last two tests is <2 degrees and the amplitude difference of the multi-channel coupler at each preset temperature obtained by the last two tests is <0.2dB.

[0042] Obtaining the final characteristics of the multi-channel receiving module at each preset temperature includes the following steps: Step S51: placing the multi-channel receiving module in an incubator, and adjusting the incubator temperature to each preset temperature; Step S52: using a vector network analyzer to collect and obtain the characteristics of the multi-channel receiving module at each preset temperature; Step S53: repeating step S52 until the characteristic difference of the multi-channel receiving module at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the multi-channel receiving module at each preset temperature obtained for the last time, i.e., the final characteristics of the multi-channel receiving module at each preset temperature. Among them, the characteristic difference of the multi-channel receiving module at each preset temperature obtained by the last two tests meets the preset requirements as follows: the phase difference of the multi-channel receiving module at each preset temperature obtained by the last two tests is <2 degrees and the amplitude difference of the multi-channel receiving module at each preset temperature obtained by the last two tests is <0.2dB.

[0043] Obtaining the final characteristics of the internal calibration system at each preset temperature includes the following steps: Step S61: placing the internal calibration system in a temperature box, and adjusting the temperature of the temperature box to each preset temperature; Step S62: using a vector network analyzer to collect and obtain the characteristics of the internal calibration system at each preset temperature; Step S63: repeating step S62 until the characteristic difference of the internal calibration system at each preset temperature obtained by the last two tests meets the preset requirements, and recording the characteristics of the internal calibration system at each preset temperature obtained at the last time, i.e., the final characteristics of the internal calibration system at each preset temperature. Among them, the characteristic difference of the internal calibration system at each preset temperature obtained by the last two tests meets the preset requirements as follows: the phase difference of the internal calibration system at each preset temperature obtained by the last two tests is <2 degrees and the amplitude difference of the internal calibration system at each preset temperature obtained by the last two tests is <0.2dB.

[0044] The characteristics mentioned above include amplitude and phase.

[0045] The transmit calibration link characteristics are obtained by the following formula:

[0046] S 发射定标链路 =S 处理器 +S 多通道发射模块 +S 多通道环形器 +S 多通道耦合器 +S 多通道接收模块 ;

[0047] Among them, S 发射定标链路 To calibrate the link characteristics for transmission, S 处理器 The final processor characteristics at each preset temperature, S 多通道发射模块 The characteristics of the multi-channel transmitter module at each final preset temperature, S 多通道环形器 The final characteristics of the multi-channel circulator at each preset temperature, S多通道耦合器 The final characteristics of the multi-channel coupler at each preset temperature, S 多通道接收模块 Characterization of the multi-channel receiver module at each temperature for the final preset.

[0048] The receive calibration link characteristics are obtained by the following formula:

[0049] S 接收定标链路 =S 处理器 +S 内定标系统 +S 多通道环形器 +S 多通道耦合器 +S 多通道接收模块 ;

[0050] The reference calibration link characteristics are obtained by the following formula:

[0051] S 参考定标链路 =S 处理器 +S 内定标系统 +S 多通道接收模块 ;

[0052] The transmit and receive link characteristics are obtained through the following formula:

[0053] S 收发链路 =S 发射定标链路 +S 接收定标链路 -S 参考定标链路 ;

[0054] Among them, S 收发链路 is the transmit and receive link characteristic, S 参考定标链路 is the reference calibration link characteristic, S 接收定标链路 To calibrate the link characteristics for transmission, S 处理器 The final processor characteristics at each preset temperature, S 内定标系统 The characteristic of the internal calibration system at each final preset temperature, S 多通道环形器 The final characteristics of the multi-channel circulator at each preset temperature, S 多通道耦合器 The final characteristics of the multi-channel coupler at each preset temperature, S 多通道接收模块 Characterization of the multi-channel receiver module at each temperature for the final preset.

[0055] According to the characteristics of the spaceborne SAR system, all the units on the full link channel of the spaceborne SAR system are analyzed. In addition, the temperature sensitive points of different units on the full transceiver link are analyzed, and the amplitude and phase characteristics of the DUT within the effective bandwidth at different temperature points are collected and analyzed using a temperature chamber and a vector network analyzer. The amplitude and phase characteristics of all temperature-sensitive units are calibrated under full temperature change conditions.

[0056] The transmission calibration link includes a processor, a multi-channel transmission, a multi-channel circulator, a multi-channel coupler, an internal calibration system, and a multi-channel reception. The reception calibration link includes a processor, an internal calibration system, a multi-channel coupler, a multi-channel circulator, and a multi-channel reception. The reference calibration link includes a processor, an internal calibration system, and a multi-channel reception.

[0057] Specifically, the method comprises the following steps:

[0058] Step 1: Place the device under test in a temperature box and adjust the temperature of the temperature box to a desired temperature. The device under test includes a processor, a multi-channel transmitting module, a multi-channel circulator, a multi-channel coupler, a multi-channel receiving module and an internal calibration system.

[0059] Step 2: Use a vector network analyzer to collect and analyze the amplitude and phase characteristics of the device under test within the effective bandwidth at the temperature point.

[0060] Step 3: Repeat the amplitude-phase characteristic test in step 2 at this temperature until the phase difference of the last two tests is less than 2 degrees and the amplitude difference is less than 0.2 dB.

[0061] Step 4: Repeat steps 1, 2, and 3 until the amplitude and phase characteristics of all temperature points are calibrated.

[0062] Step 5. Repeat steps 1, 2, 3, and 4 until the amplitude and phase characteristics of all temperature measurement points within the full temperature range are calibrated.

[0063] Step 6: Obtain the characteristics of the transmission calibration link, which includes a processor, a multi-channel transmission module, a multi-channel circulator, a multi-channel coupler, an internal calibration system, and a multi-channel receiving module. Obtain the characteristics of the receiving calibration link, which includes a processor, an internal calibration system, a multi-channel coupler, a multi-channel circulator, and a multi-channel receiving module. Obtain the characteristics of the reference calibration link, which includes a processor, an internal calibration system, and a multi-channel receiving module.

[0064] Step 7: The complete system transceiver link characteristics are obtained by adding the transmit calibration link characteristics to the receive calibration link characteristics and subtracting the reference calibration link characteristics.

[0065] This embodiment solves the problem that the multi-channel full transceiver link cannot be fully obtained in the traditional calibration process; at the same time, it solves the problem that the calibration results are inaccurate due to system temperature changes under multi-mode and multi-conditions, thereby affecting the ultra-high resolution SAR imaging effect and the accuracy of moving target recognition.

[0066] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A satellite-borne full-temperature multi-channel internal calibration method, characterized in that include: Get the final characteristics of the processor at each preset temperature; Obtain the characteristics of the multi-channel transmission module at each final preset temperature; Obtain the characteristics of the multi-channel circulator at each final preset temperature; Obtain the characteristics of the multi-channel coupler at each final preset temperature; Obtain the characteristics of the multi-channel receiving module at each final preset temperature; Obtain the characteristics of the internal calibration system at each final preset temperature; Obtaining transmission calibration link characteristics according to characteristics of the processor at each final preset temperature, characteristics of the multi-channel transmission module at each final preset temperature, characteristics of the multi-channel circulator at each final preset temperature, characteristics of the multi-channel coupler at each final preset temperature, and characteristics of the multi-channel receiving module at each final preset temperature; Obtaining receiving calibration link characteristics according to characteristics of the processor at each final preset temperature, characteristics of the internal calibration system at each final preset temperature, characteristics of the multi-channel circulator at each final preset temperature, characteristics of the multi-channel coupler at each final preset temperature, and characteristics of the multi-channel receiving module at each final preset temperature; Obtaining reference calibration link characteristics according to characteristics of the processor at each final preset temperature, characteristics of the internal calibration system at each final preset temperature, and characteristics of the multi-channel receiving module at each final preset temperature; The transceiver link characteristics are obtained according to the transmission calibration link characteristics, the reception calibration link characteristics and the reference calibration link characteristics.

2. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1 is characterized in that: Obtaining the final processor characteristics at each preset temperature includes the following steps: Step S11: placing the processor in a temperature box and adjusting the temperature of the temperature box to each preset temperature; Step S12: using a vector network analyzer to collect and obtain the characteristics of the processor at each preset temperature; Step S13: Repeat step S12 until the difference in processor characteristics at each preset temperature obtained from the last two tests meets the preset requirements, and record the characteristics of the processor at each preset temperature obtained last time, i.e., the final characteristics of the processor at each preset temperature.

3. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1 is characterized in that: Obtaining the final characteristics of the multi-channel transmitter module at each preset temperature includes the following steps: Step S21: placing the multi-channel transmitting module in an incubator, and adjusting the incubator temperature to each preset temperature; Step S22: using a vector network analyzer to collect and obtain the characteristics of the multi-channel transmission module at each preset temperature; Step S23: Repeat step S22 until the characteristic difference of the multi-channel transmission module at each preset temperature obtained from the last two tests meets the preset requirements, and record the characteristics of the multi-channel transmission module at each preset temperature obtained for the last time, that is, the final characteristics of the multi-channel transmission module at each preset temperature.

4. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1 is characterized in that: Obtaining the final characteristics of the multi-channel circulator at each preset temperature includes the following steps: Step S31: placing the multi-channel circulator in an incubator, and adjusting the incubator temperature to each preset temperature; Step S32: using a vector network analyzer to acquire characteristics of the multi-channel circulator at each preset temperature; Step S33: Repeat step S32 until the characteristic difference of the multi-channel circulator at each preset temperature obtained from the last two tests meets the preset requirements, and record the characteristics of the multi-channel circulator at each preset temperature obtained last time, that is, the final characteristics of the multi-channel circulator at each preset temperature.

5. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1 is characterized in that: Obtaining the final characteristics of the multi-channel coupler at each preset temperature includes the following steps: Step S41: placing the multi-channel coupler in a temperature box, and adjusting the temperature of the temperature box to each preset temperature; Step S42: using a vector network analyzer to acquire characteristics of the multi-channel coupler at each preset temperature; Step S43: Repeat step S42 until the characteristic difference of the multi-channel coupler at each preset temperature obtained from the last two tests meets the preset requirements, and record the characteristics of the multi-channel coupler at each preset temperature obtained last time, i.e., the final characteristics of the multi-channel coupler at each preset temperature.

6. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1 is characterized in that: Obtaining the final characteristics of the multi-channel receiving module at each preset temperature includes the following steps: Step S51: placing the multi-channel receiving module in a temperature box, and adjusting the temperature of the temperature box to each preset temperature; Step S52: using a vector network analyzer to collect and obtain characteristics of the multi-channel receiving module at each preset temperature; Step S53: Repeat step S52 until the characteristic difference of the multi-channel receiving module at each preset temperature obtained from the last two tests meets the preset requirements, and record the characteristics of the multi-channel receiving module at each preset temperature obtained last time, that is, the final characteristics of the multi-channel receiving module at each preset temperature.

7. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1 is characterized in that: Obtaining the final characteristics of the internal calibration system at each preset temperature includes the following steps: Step S61: placing the internal calibration system in a temperature box, and adjusting the temperature of the temperature box to each preset temperature; Step S62: using a vector network analyzer to collect and obtain the characteristics of the internal calibration system at each preset temperature; Step S63: Repeat step S62 until the characteristic difference of the internal calibration system at each preset temperature obtained from the last two tests meets the preset requirements, and record the characteristics of the internal calibration system at each preset temperature obtained last time, i.e., the final characteristics of the internal calibration system at each preset temperature.

8. The satellite-borne full-temperature multi-channel internal calibration method according to any one of claims 1 to 7, characterized in that: The characteristics include amplitude and phase.

9. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1, characterized in that: The transmit calibration link characteristics are obtained by the following formula: S 发射定标链路 =S 处理器 +S 多通道发射模块 +S 多通道环形器 +S 多通道耦合器 +S 多通道接收模块 ; Among them, S 发射定标链路 To calibrate the link characteristics for transmission, S 处理器 The final processor characteristics at each preset temperature, S 多通道发射模块 The characteristics of the multi-channel transmitter module at each final preset temperature, S 多通道环形器 The final characteristics of the multi-channel circulator at each preset temperature, S 多通道耦合器 The final characteristics of the multi-channel coupler at each preset temperature, S 多通道接收模块 Characterization of the multi-channel receiver module at each temperature for the final preset.

10. The satellite-borne full-temperature multi-channel internal calibration method according to claim 1, characterized in that: The receive calibration link characteristics are obtained by the following formula: S 接收定标链路 =S 处理器 +S 内定标系统 +S 多通道环形器 +S 多通道耦合器 +S 多通道接收模块 ; The reference calibration link characteristics are obtained by the following formula: S 参考定标链路 =S 处理器 +S 内定标系统 +S 多通道接收模块 ; The transmit and receive link characteristics are obtained through the following formula: S 收发链路 =S 发射定标链路 +S 接收定标链路 -S 参考定标链路 ; Among them, S 收发链路 is the transmit and receive link characteristic, S 参考定标链路 is the reference calibration link characteristic, S 接收定标链路 To calibrate the link characteristics for transmission, S 处理器 The final processor characteristics at each preset temperature, S 内定标系统 The characteristic of the internal calibration system at each final preset temperature, S 多通道环形器 The final characteristics of the multi-channel circulator at each preset temperature, S 多通道耦合器 The final characteristics of the multi-channel coupler at each preset temperature, S 多通道接收模块 Characterization of the multi-channel receiver module at each temperature for the final preset.

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