Multifunctional microwave combination design method and device for bistatic satellite-borne SAR system

A combined design and multi-functional technology, applied in the direction of measuring devices, radio wave measurement systems, radio wave reflection/reradiation, etc., can solve the problems of low accuracy of amplitude and phase consistency, complex circuits, high technical difficulty, etc., to achieve suppression The effect of signal leakage and high-quality transmission

CN110488286AActive Publication Date: 2019-11-22INST OF ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-11-22

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Abstract

The invention belongs to the technical field of central electronic equipment of a bistatic interferometric synthetic aperture radar system, and discloses a multifunctional microwave combination designmethod and device for a bistatic satellite-borne SAR system. The device has the high-precision amplitude, the phase consistency, the in-band flatness and the transceiving isolation in various transmitting and receiving function modes to achieve that the amplitude consistency between channels within 150MHz bandwidth is less than or equal to 0.2dB, the phase consistency is less than or equal to 2 degrees, the requirements of high-precision interferometric phase measurement and the like in the double-base interferometric SAR can be met, and the imaging effect of a new system high-resolution andwide-swath spaceborne SAR technology is ensured. The invention has the outstanding advantages that: 1, the characteristics of multiple functions, low power consumption, high-requirement temperature stability and the like are achieved under the condition of the small size of the device; and 2, various specific requirements of the high amplitude consistency, the phase consistency, the in-band flatness, the transceiving isolation and the like of a transceiving link are met, the overall circuit topology under different transceiving modes is optimized and innovated, and various indexes are achieved.
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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...

Examples

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...