Quad-band bandpass filter based on dual-plane microstrip/DGS slot structure

被引：46
作者：
Ren, L. -Y. [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu 611731, Peoples R China
来源：
ELECTRONICS LETTERS | 2010年 / 46卷 / 10期
关键词：
RESONATORS;
D O I：
10.1049/el.2010.0618
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：
An approach for designing a quad-band bandpass filter is presented. The dual-plane structure composed of both a microstrip and a defected ground structure (DGS) slot is employed to obtain quad-frequency responses. The slot, with interdigital shape in the DGS, is designed to obtain dual-frequency responses and transmission zeros are introduced to split both passbands into two. The equivalent-circuit model is derived for the filter. A filter with four passbands centring at 1.74, 2.09, 2.75 and 3.14 GHz is shown with a stopband attenuation greater than 20 dB over the frequency range from 3.38 to 7.70 GHz.
引用
收藏
页码：691 / U44
页数：2
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