Miniaturized dual-band bandpass filter with good frequency selectivity using SIR and DGS

被引：23

作者：

Song, Kaijun ^{[1
]}

Zhang, Fan ^{[1
]}

Fan, Yong ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Engn, EHF Key Lab Sci, Chengdu 611731, Peoples R China

来源：

AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS | 2014年 / 68卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Dual-band bandpass filter; Miniaturized; Stepped-impedance resonator (SIR); Defected ground structure (DGS); TRANSMISSION ZEROS; DESIGN; PASSBAND; RESONATORS;

D O I：

10.1016/j.aeue.2013.10.005

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 miniaturized dual-band bandpass filter (BPF) using stepped impedance resonator (SIR) and defected ground structure (DGS) is presented. In order to get two desired passbands, two different transmission paths and source-load cross coupling have been implemented. One path is the SIR, and the other is the DGS. Meanwhile, it is easy to obtain good frequency selectivity by introducing several transmission zeros. The coupling scheme and current distributions are applied to demonstrate the flexible design approach. A dual-band BPF is designed, simulated, and fabricated to demonstrate the performance of the proposed dual-band filter. The measured results show that the fabricated dual-band BPF has two passbands centered at 2.41 and 3.52 GHz with the fractional bandwidth of 5.8 and 7.7%, respectively. The measured insertion loss is about 2 dB and 2.2 dB at the lower and upper passbands. The measured results show good agreement with the simulated ones. (c) 2013 Elsevier GmbH. All rights reserved.

引用

页码：384 / 387

页数：4

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