新型多阶跃枝节加载双频带通滤波器  

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

作　　者：黄春艳[1] 肖中银[1] 寇鑫[1] 储君君[1] 李好[1] 

机构地区：[1]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

出　　处：《上海大学学报（自然科学版）》2012年第5期459-463,共5页Journal of Shanghai University:Natural Science Edition

基　　金：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)

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.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.

关 键 词：双频 带通滤波器 阶跃枝节加载 奇-偶模 

分 类 号：TN713[电子电信—电路与系统]