A high-power synthesizer and synthesis method for spaceborne light sar

Abstract

A high-power combiner for space-borne light SAR, the signal is input to the power divider (in the case of single feed, directly input to the electronic switch), the electronic switch outputs the signal to a certain port of the input Butler matrix, and the input to the Butler matrix The signal is divided according to a certain phase relationship, and output to the phase shifter group for compensating the phase error. The phase shifter group compensates the phase error of the signal and then outputs it to the pulse line release group for power amplification. The pulse line release group then amplifies the power. The signal is output to the output Butler matrix, and the output Butler matrix synthesizes the signal to the corresponding output port according to the selection relationship of the front electronic switch, and finally the signal enters the antenna feed through the circulator to form the corresponding transmission beam. Adoption of the technology of the invention can avoid the development bottleneck of aerospace-grade high-power pulse travel and the risk of failure of high-power electronic switches on orbit, is simple to implement, has high reliability, and can realize the wave control function of antenna beam switching.

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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