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.
出处
《微波学报》
CSCD
北大核心
2015年第2期59-62,共4页
Journal of Microwaves
关键词
梳状
带通滤波器
电调滤波器
comb-shaped,bandpass filter,tunable filter
