Compact UWB bandpass filter with improved upper-stopband performance

被引：23

作者：

Chu, Q. -X. ^{[1
]}

Li, S. -T. ^{[1
]}

机构：

[1] S China Univ Technol, Sch Elect & Informat Engn, Guangzhou, Guangdong, Peoples R China

来源：

ELECTRONICS LETTERS | 2008年 / 44卷 / 12期

关键词：

Natural frequencies;

D O I：

10.1049/el:20080789

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 ultra-wideband (UWB) bandpass filter ( BPF) using aperture-backed interdigital coupled lines and a stub-loaded folded stepped-impedance resonator (SLFSIR) is presented. In the design, the first four resonant frequencies of this SLFSIR are properly adjusted to be placed evenly within the UWB while the fifth resonant frequency is raised above 16.0 GHz to improve upper-stopband performance. Furthermore, the aperture-backed interdigital coupled lines can create a transmission zero to cancel the fifth resonant mode of the SLFSIR to make a wider upper-stopband as well as raising the coupling degree to relax the tight line spacing. After optimisation of this filter, good UWB bandpass behaviour is theoretically realised and experimentally confirmed.

引用

页码：742 / U133

页数：2