Dual-Band Coaxial Cavity Bandpass Filter With Helical Feeding Structure and Mixed Coupling

被引：43

作者：

Chen, Fu-Chang ^{[1
]}

Qiu, Jie-Ming ^{[1
]}

Wong, Sai-Wai ^{[1
]}

Chu, Qing-Xin ^{[1
]}

机构：

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

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2015年 / 25卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Bandpass filter (BPF); coaxial cavity; dual-band filter; helical feeding structure; stepped-impedance resonator; DESIGN;

D O I：

10.1109/LMWC.2014.2369965

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：

In this letter, stepped-impedance resonators are used in coaxial cavity filter to generate dual-band response. Two key merits of the proposed filter are the helical feeding structure and the introduction of mixed coupling for coupling control and generation of transmission zero. The helical feeding structure makes it possible to conveniently control the external quality factors of two bands. To illustrate the concept, a third-order dual-band coaxial cavity filter is designed, fabricated and measured. The measured results are in good agreement with the full-wave simulation results.

引用

页码：31 / 33

页数：3

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