Design and Realization of Zero Frequency Reject in High Performance Receiver
This paper discusses the LO feedthroughs impact on receivers specifications and the necessary of zero frequency reject firstly, then presents a method of zero reject based on amplitude and phase adjustment controlled by main processor. The sampling signals amplitude is changed by voltage variable attenuator and the phase is adjusted by varying the inverse voltage applied to the voltage variable capacitor diodes which connect to Lange Couplers couple ports. The method is proved to have characteristics such as high reject capability, small volume, reliable etc.
LO feedthrough zero frequency reject Lange coupler impedance match voltage variable attenuator
Hao Yingwen
The 41st Research Institute of CETC,National Key Laboratory of Science and Technology on Electronic Test and Measurement,Qingdao,266555,China
国际会议
厦门
英文
788-790
2010-05-22（万方平台首次上网日期，不代表论文的发表时间）