High-selectivity dual-band bandpass filter using folded stepped-impedance resonators and asymmetric coupling lines

被引：2

作者：

Cheng, Wei ^{[1
]}

Wang, Xin-Huai ^{[1
]}

Tuo, Yong ^{[1
]}

Bai, Yan-Fu ^{[1
]}

Shi, Xiao-Wei ^{[1
]}

机构：

[1] Xidian Univ, Lab Sci & Technol Antennas & Microwaves, Xian 710071, Shaanxi, Peoples R China

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2012年 / 54卷 / 08期

基金：

美国国家科学基金会;

关键词：

folded stepped-impedance resonators; asymmetric coupling lines; dual-band bandpass filter; COMPACT; DESIGN; BPF;

D O I：

10.1002/mop.26928

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 microstrip line dual-band bandpass filter using folded stepped-impedance resonators (FSIRs) with high selectivity is proposed and implemented. The filter consists of two FSIRs and asymmetric coupling input/output lines. By utilizing resonance characteristics of the FSIRs, a compact filter is designed for WLAN (2.4 and 5.2 GHz). In the new design, asymmetric coupling input/output lines are applied not only to generate two more transmission zeros than the symmetric ones but also to tune the transmission zeros to improve the selectivity. These performances are demonstrated by simulation and measurement. Owing to asymmetric coupling input/output lines, five transmission zeros could be generated near the passband edges to improve the selectivity. Both experimental and simulated results are with good agreement. (C) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:18661869, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26928

引用

页码：1866 / 1869

页数：4

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