High-power synthesizer and synthetic method for light satellite-borne synthetic aperture radar (SAR)

Abstract

The invention relates to a high-power synthesizer for a light satellite-borne synthetic aperture radar (SAR). A signal is input to a power divider (in a case of a single feed source, the signal is directly input to an electronic switch), the signal is output to a certain port of an input Butler matrix by the electronic switch, the input Butler matrix is used for performing power division on the signal according to a certain phase relation, the signal is output to a phase shifter group for phase error compensation, the signal is output to a pulse power amplifier group for power amplification after being subjected to phase error compensation by the phase shifter group, the pulse power amplifier group outputs the signal to an output Butler matrix, the output Butler matrix is used for synthesizing the signal to a corresponding output port according to the selective relation of the previous electronic switch, and finally the signal passes through a circulator and then enters an antenna feed source to form corresponding emission wave beams. By adopting the technology disclosed by the invention, the development bottleneck of aerospace high-power pulse power amplification and the on-orbit failure risk of a high-power electronic switch can be avoided, the high-power synthesizer is simple to implement and is high in reliability, and moreover, the wave control function of antenna wave beam switching can be achieved.

Description

technical field [0001] The invention relates to a high-power synthesizer and a synthesis method, in particular to a high-power synthesizer and a synthesis method for space-borne light-duty SAR, which can realize the two-degree-of-freedom movement of sailboards on the star, and belongs to the field of microwave remote sensing technology . Background technique [0002] Spaceborne SAR is a high-resolution microwave imaging radar. Compared with other remote sensors such as visible light and infrared, it has the characteristics of all-weather, all-time, and long-distance imaging. It can even penetrate vegetation or strata at a certain depth. Covered by vegetation, even hidden target information at a certain depth below the surface. Due to the advantages of high resolution, global, all-weather, and all-day time, spaceborne SAR solves the adverse effects of night and cloud cover on aerospace imaging reconnaissance, and has become an indispensable and important part of aerospace mi...

AI Technical Summary

Problems solved by technology

The existing technology only combines the power of multiple power amplifiers into one channel, and then performs power division and high-power switch selection according to the needs of the antenna beam. The entire star function fails or decreases. In addition, the existing technology includes high-power power dividers and high-power electronic switches, which have large insertion loss, reduce system sensitivity performance, and have complex control relationships.

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