新型多阶跃枝节加载双频带通滤波器

黄春艳,肖中银,寇鑫,储君君,李好

doi:10.3969/j.issn.1007-2861.2012.05.004

上海大学学报(自然科学版) >

2012 , Vol. 18 >Issue 5: 459 - 463

DOI: https://doi.org/10.3969/j.issn.1007-2861.2012.05.004

通信与信息工程

新型多阶跃枝节加载双频带通滤波器

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上海大学特种光纤与光接入网省部共建重点实验室，上海 200072

收稿日期: 2011-11-09

网络出版日期: 2012-10-30

基金资助

国家自然科学基金资助项目（61077068）:上海市自然科学基金资助项目（10ZR1411900）:上海市重点学科建设资助项目(S30108);上海市科委重点实验室资助项目(08DZ2231100)

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Dual-Band Bandpass Filter Using Stub-Loaded Multiple Stepped-Impedance Resonators

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Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China

Received date: 2011-11-09

Online published: 2012-10-30

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摘要

提出一种新型的、各中心频率可调的多阶跃枝节加载双频滤波器，该微带双频滤波器采用多阶跃阻抗结构，通过增加更多的自由度来调节中心频率.由于谐振器为对称结构，所以采用传统的奇-偶模分析方法.通过调整阶跃阻抗的阻抗比和电长度，可以很容易获得一个可独立调节各个中心频率的双频滤波器.该滤波器工作在2.44 GHz（WLAN）和3.50 GHz(WiMAX)这两个频段，3 dB相对带宽分别为6%和2.6%，测试结果和仿真结果基本吻合.

关键词： 带通滤波器; 阶跃枝节加载; 奇-偶模; 双频

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黄春艳,肖中银,寇鑫,储君君,李好 . 新型多阶跃枝节加载双频带通滤波器[J]. 上海大学学报(自然科学版), 2012 , 18(5) : 459 -463 . DOI: 10.3969/j.issn.1007-2861.2012.05.004

Abstract

A novel dual-band filter using stub-loaded multiple stepped-impedance resonators is proposed. This filter can control each center frequency independently. In order to get more degrees of freedom, the microstrip filter uses a multiple stepped-impedance structure. Due to symmetry of the structure, the traditional even-odd mode analysis can be used. A dual-band filter can easily be obtained by adjusting the impedance ratio and electrical length. The dual-band filter with 3 dB relative bandwidths of 6% and 2.6% can be applied to 2.44 GHz (WLAN) and 3.50 GHz (WiMAX), respectively. Simulation results agree well with measurements.

Key words： bandpass filter (BPF); dual-band; even-odd mode; stepped stub-loaded

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