Methods of Weak Signal Detection in Microwave Power Measurement and the Implementations

摘要：

The common techniques used for microwave power detection was firstly introduced. Then the issues of weak signal processing in microwave average power measurement based on thermocouple and diode were fully proposed. After the principles of chopping amplification and sigma-delta ADC were discussed, the actual practical circuit was presented. Emphasis was focused on the chopper, AC amplifier, de-chopping methods and the implementation of the sigma-delta ADC circuit The results show that the techniques of chopping amplifier and sigma-delta data acquisition system can improve the SNR remarkably. And the dynamic rang for RF/microwave power measurement can be expanded down to -67dBm.

作者: Zhao Hao

作者单位: The 41st Research Institute of CETC, Qingdao 266555, China National Key Laboratory of Science and Technology on Electronic Test and Measurement, Qingdao 266555, China

会议类型: 国际会议

会议名称: 2010 International Conference on Microwave and Millimeter Wave Technology(2010国际微波与毫米波技术会议 ICMMT2010)

会议地点: 成都

会议语种:英文

页码: 1077-1079

在线出版日期: 2010-05-08（万方平台首次上网日期，不代表论文的发表时间）