A New Class of Waveguide Dual-Mode Filters Using TM and Nonresonating Modes

被引：119
作者：
Bastioli, Simone [1 ]
Tomassoni, Cristiano [2 ]
Sorrentino, Roberto [1 ]
机构：
[1] RF Microtech SRL, I-06125 Perugia, Italy
[2] Univ Perugia, Dipartimento Elettron & Informaz DIEI, I-06125 Perugia, Italy
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2010年 / 58卷 / 12期
关键词：
Bandpass filters; dual mode; elliptic filters; transmission zeros (TZs); waveguide filters; MODULAR DESIGN;
D O I：
10.1109/TMTT.2010.2086068
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：
An innovative class of very compact and selective waveguide dual-mode filters is presented in this paper. The basic structure is the TM dual-mode cavity. Such a cavity employs both resonant and nonresonating modes so as to provide two reflection and two transmission zeros. The high design flexibility in terms of transmission zero positioning and response bandwidth has been demonstrated by means of several single cavity designs. The design of Nth-order multiple cavity filters with N transmission zeros is presented and discussed. Different filter topologies are obtained depending on the waveguide structure used to connect adjacent cavities. An efficient mode-matching analysis method is proposed and verified for fast filter optimization. An eighth-order filter with eight transmission zeros has been designed, manufactured, and tested to demonstrate the potentialities of the filter class proposed.
引用
收藏
页码：3909 / 3917
页数：9
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