低损耗双谐振微带带通滤波器设计*

低损耗双谐振微带带通滤波器设计

内容简介：　　为了既满足实现双谐振的零度馈电结构，又能实现阻抗匹配，采用双点双线馈电技术和具有开口环、阶跃阻抗谐振双重特性的结构设计双通带滤波器。版图仿真结果表明：两个谐振频率分别为2．7 GHz和5．05 GHz，符合射频电子标签所需的两路信号，其对应的回波损耗分别为-38 dB和-49 dB，插入损耗为-0．2 dB和-0．4 dB，从而实现了低损耗特性和尖锐的选择性。

Abstract： In order to realize impedance matching and meet the zero feed structure which realizes double reso-nance,double point dual feed technology and double characteristic structure of split ring and SIR are adopted to design a double bandpass filter . The simulation results show that two resonant frequencies are 2 . 7 GHz and 5 . 05 GHz,which correspond directly with the two channels signal of radio frequency electronic label . The cor-responding echo losses are -38 dB and -49 dB,and the insert losses are -0 . 2 dB and -0 . 4 dB,thereby to realize the low loss characteristics and sharp selectivity .

作者：李勇, 邹传云,

关键词：微带带通滤波器, 双点双线馈电, 阶跃阻抗谐振器, 开口环, 双通带