星载合成孔径雷达系统的内定标

Internal Calibration of Spaceborne SAR System

介绍了星载合成孔径雷达(SAR)的内定标原理和有源相控阵SAR内定标的实现方法。内定标主要用于测量发射功率和接收增益的相对变化,也可用于监测TR组件的失效情况和定性分析天线性能。要提高测量精度需保障内定标设备尽可能小的温度变化特性及寿命期内小的性能变化。

This paper introduces the principle and technique of internal calibration of spaceborne active array SAR. The main purpose of internal calibration is to measure the relative changes of transmitted power and receiver gain, and also to be used for monitoring TR module failures and qualitative analysis of the performance of active antenna. To improve measurement precision requires the equipment of internal calibration has little change of performance with temperature in its life-span.