A multifunctional microwave combined design method and device for a dual-base spaceborne SAR system

A combined design, multi-functional technology, applied in measurement devices, radio wave measurement systems, reflection/re-radiation of radio waves, etc., can solve problems such as poor reliability, complex circuits, low amplitude and phase consistency accuracy, etc.

Active Publication Date: 2021-09-14
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Aiming at the problems in the prior art that the internal circuit of the microwave combination device is complicated, the technology is difficult, the reliability is poor, and the accuracy of the amplitude and phase consistency between the channels in the transmitting mode and the receiving mode is low, the present invention proposes the method of using integrated microwave components, through etc. The sub-circuit topology is convenient for debugging and assembly, and finally realizes the overall small size of the device, high-precision amplitude and phase consistency

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  • A multifunctional microwave combined design method and device for a dual-base spaceborne SAR system
  • A multifunctional microwave combined design method and device for a dual-base spaceborne SAR system

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Embodiment Construction

[0012] The specific implementation manner of the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0013] Such as figure 1 As shown, a multi-functional microwave combination design method and device for a dual-base spaceborne SAR system divides the entire microwave combination device into a three-layer compact structure. 4 3dB bridges are interconnected, and the bridge has a cross-backup function to realize 8-channel multi-mode receiving and output; the middle layer is a power conversion unit and a control distribution unit, which provides the required ±5V and -12V for the 4-channel multi-functional transceiver components Control codes for power and multifunction modes.

[0014] Such as figure 2 As shown, the L-band transceiver component specifically includes:

[0015] 1) The microwave circuit inside the module is made of Rogers circuit board. The bottom surface of the circuit board is all stratum, which is paste...

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Abstract

The invention belongs to the technical field of central electronic equipment of a dual-base interference synthetic aperture radar system, and discloses a multi-functional microwave combination design method and device for a dual-base spaceborne SAR system. The device has high-precision amplitude, phase consistency, in-band flatness, and transceiver isolation in a variety of transmitting and receiving function modes, and achieves amplitude consistency ≤ 0.2dB and phase consistency ≤ 2° between channels within a 150MHz bandwidth, which can meet The requirements of high-precision interferometric phase measurement in bistatic interferometric SAR ensure the imaging effect of the new system's high-resolution and wide-swath spaceborne SAR technology. The outstanding advantages of the present invention are as follows: first, it realizes the characteristics of multi-function, low power consumption and high temperature stability under the small size of the device; Various specific requirements such as internal flatness, transceiver isolation, etc., optimize and innovate the overall circuit topology under different transceiver modes, and achieve various indicators.

Description

technical field [0001] The invention belongs to the technical field of central electronic equipment of a dual-base interference synthetic aperture radar system, and relates to a multi-functional microwave combination design method and device for a dual-base spaceborne SAR system. Background technique [0002] The consistency of amplitude and phase is the key index of synthetic aperture radar imaging, which largely determines the accuracy of interferometric phase measurement in bistatic interferometric SAR. In order to achieve high-required amplitude and phase consistency in previous microwave combination devices, there are mainly the following two methods: one is to adjust the assembly sequence of different half-steel cables inside the device to achieve high-precision amplitude and phase consistency of the overall device; the other is to By adjusting the assembly sequence of independently packaged circulators, couplers, power splitters, and high-power polarization switches i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/02
CPCG01S7/02G01S13/9023G01S13/9076
Inventor 燕阳许哲刘开雨王宇
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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