Tri-band filter using combined E-type resonators

被引：18

作者：

Fan, W. X. ^{[1
]}

Li, Z. P. ^{[1
]}

Gong, S. X. ^{[1
]}

机构：

[1] Xidian Univ, Xian 710071, Shaanxi, Peoples R China

来源：

ELECTRONICS LETTERS | 2013年 / 49卷 / 03期

基金：

中国国家自然科学基金;

关键词：

STUB LOADED RESONATORS; DESIGN;

D O I：

10.1049/el.2012.3617

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 tri-band bandpass filter using novel combined E-type resonators (CETRs) is presented. The CETR consists of a quarter-wavelength (lambda/4) stepped-impedance resonator (SIR) and a quarter-wavelength (lambda/4) unit impedance resonator through a via-hole. These two components are relatively independent. The first and the third passband centre frequencies can be flexibly controlled by tuning the impedance ratio R-Z of the SIR, whereas the second passband frequency is fixed. The centre frequency of the second passband can be independently controlled by tuning the lengths of L-2. The filter is designed to operate at 1.95, 5.2, and 3.5 GHz. The simulated and measured results show good agreement.

引用

页码：193 / 194

页数：2

共 6 条

[1] Design of Tri-Band Filters With Improved Band Allocation [J].