Compact box-section bandpass filter with enhanced stopband characteristics

被引：0
|
作者：
MingxiaZhang [1 ]
Wei, Xubo [1 ]
Yuan, Shuanglin [1 ]
机构：
[1] Univ Elect Sci & Technol China, Res Inst Elect Sci & Technol, Chengdu 611731, Peoples R China
来源：
2013 INTERNATIONAL WORKSHOP ON MICROWAVE AND MILLIMETER WAVE CIRCUITS AND SYSTEM TECHNOLOGY (MMWCST) | 2013年
关键词：
bandpass filter; box-section; transmission zeros; mixed coupling;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A compact bandpass filter (BPF) with enhanced stopband characteristics is presented in this paper. The proposed BPF consists of four improved stepped impedance resonators (SIRs), which implements into a box-section strcture. To improve the frequency selectivity and the stopband characteristics, additional transmission zero (TZ) was introduced by mixed electric and magnetic (EM) coupling. A new filter with 31.2% fractional bandwidth (FBW) has been designed and fabricated to verify the validity of the proposed method. The filter has two transmission zeros, where TZ(1) is located in 0.4GHz with 78.7dB rejection and TZ(2) is located in 2.7GHz with 50.2 dB rejection. Measured results are in good agreement with the electromagnetic simulation.
引用
收藏
页码：257 / 260
页数：4
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