微波辐射计新型检波器研究  

Research on the new type of detector for microwave radiometer

作　　者：董帅[1,2] 王振占[1] 王新彪[1] 贺秋瑞[1,2] 

机构地区：[1]中国科学院国家空间科学中心微波遥技术重点实验室,北京100190 [2]中国科学院大学,北京100190

出　　处：《电子设计工程》2017年第1期171-174,178,共5页Electronic Design Engineering

基　　金：国家空间科学先导专项基金(XDA04061202)

摘　　要：介绍了肖特基二极管和乘法器的平方率检波原理,针对微波辐射计的功能设计了乘法检波模块和放大、滤波电路。乘法检波模块以ADL5391为核心,信号输入端采用差分电路,在50 MHz^2GHz的带宽和-16~4d Bm的动态范围内实现了0.999 99的输出线性度。对比测试了传统二极管检波器,与之相比,乘法检波器表现出有效带宽大、动态范围宽、线性度高、稳定性好的性能优势。The principles of Schottky diodes and multiplier for square-law detection are introduced. The multiplicative detector, low frequency amplifier and low pass filter for microwave radiometer are designed. The multiplieative detector is based on ADL5391, and the signal input port is developed as differential circuit. A measured linearity of 0.99999 from 50MHz to 2GHz while maintaining an dynamic range between -16dBm and 4dBm is demonstrated.Compared with the traditional diode detector, the multiplicative detector has the advantages of high bandwidth, wide dynamic range, high linearity and good stability.

关 键 词：检波器 微波辐射计 模拟乘法器 平方律检波 

分 类 号：TN763.1[电子电信—电路与系统]