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引用本文：

李勇,邹传云.低损耗双谐振微带带通滤波器设计[J].电讯技术，2013，53（8）： - . [点击复制]
LI Yong,ZOU Chuan-yun.Design of a low loss microstrip bandpass filter with double resonance[J].，2013，53（8）： - . [点击复制]

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低损耗双谐振微带带通滤波器设计
李勇,邹传云
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(成都理工大学工程技术学院，四川乐山 614007;西南科技大学信息工程学院，四川绵阳 621010)

摘要:

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。

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

DOI：

基金项目:国家自然科学基金资助项目(61075030)

Design of a low loss microstrip bandpass filter with double resonance

LI Yong,ZOU Chuan-yun

()

Abstract:

In order to realize impedance matching and meet the zero feed structur e which realizes double resonance,double point dual feed technology and dou ble characteristic structure of split ring and SIR are adopted to design a doubl e bandpass filter. The simulation results show that two resonant frequencies are 2.7 GHz a nd 5.05 GHz, which correspond directly with the two channels signal of radio frequency electronic label. The corresponding echo losses are -38 dB and  -49 dB, and the insert losses are -0.2 dB and -0.4 dB, thereby to realiz e the low loss characteristics and sharp selectivity.

Key words: microstrip bandpass filter double point dual feed step impedance resonator split ring double bandpass