A Compact Wideband Bandstop Filter Using Microstrip Ring Structure

被引：0
|
作者：
Tabei, Toshiki [1 ]
Ma, Zhewang [1 ]
Ohira, Masataka [1 ]
机构：
[1] Saitama Univ, Grad Sch Sci & Engn, Sakura Ku, 255 Shimo Okubo, Saitama, Saitama 3388570, Japan
来源：
2019 23RD INTERNATIONAL CONFERENCE ON APPLIED ELECTROMAGNETICS AND COMMUNICATIONS (ICECOM 2019) | 2019年
基金：
日本学术振兴会;
关键词：
Wideband bandstop filter; microstrip ring structure; transmission zero; reflection zero; general Chebyshev frequency response; stepped impedance;
D O I：
暂无
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 novel compact wideband bandstop filter (BSF) is proposed by using microstrip ring structure with stepped impedance lines. The equilvalent circuit of the BSF is analyzed, and its transmission and reflection characteristics are obtained. With appropriate definition of the realizable reflection function of the BSF and an optimization function, the circuit parameters of the BSF are solved by using an optimization algorithm. As a result, the designed BSF can realize a general Chebyshev frequency response with three transmission zeros in its stopband and six reflection zeros in its passband. As an example, a BSF with a fractional bandwidth of 30% and a minimum stopband rejection of 30.0 dB is designed, fabricated, and measured, and the desired wide stopband, large stopband rejection, low passband insertion loss, and sharp skirt property are verified.
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页数：3
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