宽带低功率线性调频脉冲信号功率测试方法

Power Measurement of Ultra-Wideband Weak Chirp Pulse

由于功率计只能测试功率较大的微波信号,频谱仪测试脉冲信号存在失真现象,因此低功率超宽带线性调频脉冲信号功率测试在实际工程中是一个待解决的问题。在分析频谱仪功率测试原理的基础上,通过对信号频谱及频谱仪测试机理的理论分析,提出了采用频谱仪对线性调频脉冲信号功率测试的修正方法,并进行了详细分析研究,实测数据检验了该方法的有效性,解决了宽带低功率线性调频脉冲信号测试的难题。

Due to the fact that the power meter only can measure the microwave signal with high level, and the measure distortion will occur when the pulse signal is tested by spectrum analyzer, the power measurement of low level UWB LFM signal is an unsolved matter in engineering. Based on the power measurement principle with spectrum analyzer and the theory of signal spectrum, a correction theory and method of low level LFM signal measure with spectrum analyzer is presented. The test shows the validity of the theory.