Double star Ka FMCW SAR inner scaling system, method and imaging system

Abstract

The invention relates to a double star Ka FMCW SAR inner scaling system, method and imaging system. The inner scaling system comprises an emission inner scaling subsystem and a reception inner scaling subsystem, wherein the emission inner scaling subsystem and the reception inner scaling subsystem are mounted at two satellite platforms, the emission inner scaling subsystem comprises an emission frequency synthesizer, a T scaling network, a T scaler, a first high frequency reception assembly, a first intermediate frequency receiver, an emission Ka frequency band auxiliary antenna, a T feed network and a T assembly, the reception inner scaling subsystem comprises a reception frequency synthesizer, an R scaler, a power splitter, a second high frequency reception assembly, a second intermediate frequency receiver and a reception Ka frequency band auxiliary antenna, and each reception channel of the reception inner scaling subsystem is internally provided with an R scaling network, an R feed network and an R assembly. The double star Ka FMCW SAR inner scaling system, method and imaging system is advantaged in that the inner scaling function of the double star Ka FMCW SAR imaging system is realized.

Description

technical field [0001] The invention relates to an FMCW SAR imaging system, in particular to a dual-star Ka FMCW SAR internal calibration system, method and imaging system. Background technique [0002] Synthetic Aperture Radar (SAR) can observe the earth all-weather and all-weather, provide high-resolution radar images, and can penetrate the surface and vegetation to obtain subsurface information. Therefore, it has broad application prospects in civil fields such as geological exploration, topographic mapping, flood disaster monitoring, crop identification, yield evaluation, and military fields such as battlefields and strategic reconnaissance. [0003] Any part of the entire channel chain of the SAR imaging system will affect the signal, how to compensate the influence of the channel chain on the signal is a difficult problem that must be solved in high-resolution SAR imaging. At present, a feasible method in engineering is realized through internal calibration technology...

AI Technical Summary

Problems solved by technology

As a new imaging radar system, FMCW SAR has been applied to airborne, but there is no related report on spaceborne Ka FMCW SAR imaging system, so there is no related report on spaceborne Ka FMCW SAR internal calibration system

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