星载SAR性能与T/R组件不一致性的关系

THE RELATION BETWEEN THE PERFORMANCE OF SPACEBORNE SAR SYSTEM AND THE INCONSISTANCY OF THE AMPLITUDES AND PHASES FOR T/R MODULES

本文分析了 T/ R组件幅相不一致性对星载 SAR雷达系统性能的影响 ,T/ R组件不一致性对星载 SAR雷达天线副瓣电平有一定的影响。由于天线的副瓣电平是不同频率信号贡献的平均值 ,所以天线的副瓣电平的大小依赖平均 T/ R组件不一致性。

In this paper,the effects on the performance of a SAR system due to the inconsistancy of the amplitudes and phases for the T/R modules .The results shows that the inconsistancy of the amplitudes and phases of T/R modules effect the sidelobe level of the antenna.Because the wide band signal can be expressed in terms of Fourier transform,so the sidelobe level of the antenna depends on the average inconsistancy of the amplitudes and phases of the T/R modules on the whole frequency band.