Compact Quadruple-Mode Wideband Bandpass Filter Using L-Shaped Feed-Line in a Single Cavity

被引：12
|
作者：
Zhang, Zhi-Chong [1 ]
Wong, Sai-Wai [2 ]
Yu, Xuzhou [2 ]
Zhao, Bingxiong [2 ]
Wang, Diji [2 ]
Chen, Ruisen [2 ]
机构：
[1] Jinggangshan Univ, Sch Elect & Informat Engn, Jian 343009, Jiangxi, Peoples R China
[2] Shenzhen Univ, Coll Elect & Informat Engn, Shenzhen 518060, Guangdong, Peoples R China
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2021年 / 31卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Band-pass filters; Microwave filters; Resonator filters; Wideband; Resonant frequency; Filtering theory; Microwave theory and techniques; Bandpass filter (BPF); cavity; L-shaped feed-line; quadruple-mode; wideband;
D O I：
10.1109/LMWC.2021.3107952
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：
This letter presents a novel quadruple-mode cavity wideband bandpass filter (BPF). Unlike the conventional coaxial cavity resonator, the proposed cavity resonator is made up of two symmetrical conductive posts in a cylindrical cavity, while four resonant modes of the cavity resonator are classified as TM01 mode, TM11 mode, and a pair of TE degenerate modes (TE+ mode and TE- mode). All of the four modes are excited by a pair of L-shaped feed-lines. In addition, the four resonant modes are employed to constitute the passband of wideband BPF with a fractional bandwidth (FBW) of 45% at the central frequency of 2.2 GHz. Finally, the proposed filter is designed and fabricated. Good in-band filtering performance, wide upper stopband, and compact size are realized.
引用
收藏
页码：1111 / 1114
页数：4
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