Differential broadband filter based on microstrip coupled line structures

被引：10

作者：

Wang, Xiao-Hua ^{[1
]}

Hu, Shen ^{[2
]}

Cao, Qian-Yu ^{[2
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China

[2] Univ Elect Sci & Technol China, Chengdu Coll, LAS Dept, Chengdu 610054, Peoples R China

来源：

ELECTRONICS LETTERS | 2014年 / 50卷 / 15期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

Microstrip filters - Bandwidth - Microstrip lines - Microwave filters - Insertion losses;

D O I：

10.1049/el.2014.1014

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 coupled line schematic is proposed to build the differential filter featuring broadband, low insertion loss and good common-mode suppression. The proposed filter is composed of four quarter-wavelength coupled lines and four quarter-wavelength microstrip lines. The calculated, simulated and measured results are in good agreement with each other. The differential-mode signal can propagate with low insertion loss, whereas the common-mode signal will be suppressed below -10 dB. The fractional bandwidth of the proposed filter is 82% centred at 3 GHz.

引用

页码：1069 / 1070

页数：2