宽带接收机应用的超宽倍频程电调滤波器设计  

Design of Ultra Octave Tunable Filter for Wide Band Receiver Applications

作　　者：林逸群[1] 刘茉莉[1] 卢胜军[1] 

机构地区：[1]中国电子科技集团第36研究所,嘉兴314033

出　　处：《微波学报》2015年第2期59-62,共4页Journal of Microwaves

摘　　要：电调谐预选滤波器是宽带接收机的关键部件,直接影响到整机性能的好坏。设计了一种采用梳状滤波结构的电调滤波器,工作频段为200~600MHz,整个调谐范围内,1d B带宽约为12%,插入损耗小于3d B,输入二阶截点值大于60d Bm,输入三阶截点值大于20d Bm,输入输出端口驻波比小于1.8,测试和仿真结果吻合良好。该滤波器结构简单、体积小、工艺上易实现,还具有超宽倍频程的调谐范围及低插损、高截点值等优良电性能。Tunable pre-select filters are crucial components in wideband receiver,which directly effects on receiver performance. In this paper,a comb-shaped tunable filter is presented. The filter operates over a band width from 200 MHz to600MHz. The filter exhibits a 1d B-band about 12%,insertion loss less than 3d B,IIP2 more than 60 d Bm,IIP3 more than20 d Bm,VSWR less than 1. 8 at both input and output port across the 200 ~ 600 MHz band. The simulated results are good agreement with the measured ones. And also,this design has a relatively simple structure which is easy to implement in technology. In addition,this design exhibits excellent electrical properties such as ultra ovtave tuning range,low insertion loss,high IP2 and IP3.

关 键 词：梳状 带通滤波器 电调滤波器 

分 类 号：TN858[电子电信—信息与通信工程]