Compact wideband-balanced bandpass filter with high-selectivity and wideband CM suppression

被引：4
|
作者：
Shi, Jin [1 ]
Shen, Zhidan [1 ]
Qiang, Jun [1 ]
Cao, Qinghua [1 ]
机构：
[1] Nantong Univ, Sch Elect & Informat, 9 Seyuan Rd, Nantong 226019, Jiangsu, Peoples R China
来源：
ELECTRONICS LETTERS | 2018年 / 54卷 / 01期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1049/el.2017.2771
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 wideband-balanced bandpass filter is presented using two half-wavelength transmission lines, two coupled lines and one-stepped impedance stub. Compared to the reported wideband-balanced bandpass filters, the proposed one shows the advantages of small total length, high-frequency selectivity and wideband common-mode (CM) suppression. The bandwidth of CM suppression and differential-mode transmission, and the positions of transmission zeros are controllable by the parameters. One prototype was designed, fabricated and measured with the total length of 2 lambda(g) (lambda(g) is the guided wavelength at the centre frequency f(0)), 3 dB fractional bandwidth of 61% and 15 dB CM suppression bandwidth of 3.67f(0).
引用
收藏
页码：32 / 33
页数：2
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