基于RF MEMS开关的移相器设计  

Switch-Line Phase Shifter with RF-MEMS Switch

作　　者：陈华君[1] 郭东辉[1] 

机构地区：[1]厦门大学物理系,厦门361005

出　　处：《上海交通大学学报》2007年第S2期32-35,共4页Journal of Shanghai Jiaotong University

基　　金：福建省自然科学基金计划资助项目(A0410007);国家人事部留学人员创业基金项目联合资助

摘　　要：传统电子移相器由于损耗问题难以向更高频率发展,射频微机电系统(RF MEMS)技术的出现使其得以替代半导体开关来设计更高频率的移相器.利用具有优异RF性能的串联电阻式RFMEMS开关来进行开关线式移相器设计,通过开关切换不同的信号延迟通路,以实现从0°-180°步进22.5°的相移功能.仿真结果表明,该移相器在5.8 GHz时,插入损耗在-0.3--0.7 dB变化,输入回损低于-20 dB,相移功能正确.Due to the losses of semiconductor switch,traditional electronic phase shifter could hardly perform desirably at higher frequency.RF MEMS technology demonstrates that it could be used in phase shifter design as a substitute for traditional semiconductor switch.Since series resistor RF MEMS switch has excellent RF performance,it is used in the design of switch-line phase shifter.This phase shifter achieves phase shift from 0° to 180° steps(22.5°) by using RF MEMS switch to switch between different delay-time lines.The simulation results demonstrate that the insertion loss is from(-0.3) dB to(-0.7) dB,and the return loss is lower than-20 dB.The function of phase shift is correct.

关 键 词：移相器 开关线式移相器 相控阵天线 射频微机电系统 

分 类 号：TN623[电子电信—电路与系统]