Differential Bandpass Filters Based on Dumbbell-Shaped Defected Ground Resonators

被引：25
作者：
Ebrahimi, Amir [1 ]
Baum, Thomas [1 ]
Ghorbani, Kamran [1 ]
机构：
[1] RMIT Univ, Sch Engn, Melbourne, Vic 3001, Australia
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2018年 / 28卷 / 02期
关键词：
Common-mode (CM) suppression; defected ground structures (DGS); differential filter; dumbbell-shaped resonator (DSR); COMMON-MODE SUPPRESSION; SPLIT-RING RESONATORS;
D O I：
10.1109/LMWC.2017.2780765
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 dumbbell-shaped defected ground resonator and its application in the design of differential filters. The operation principle of the dumbbell-shaped resonator (DSR) coupled to differential microstrip lines is studied through a circuit model analysis. The proposed circuit model is validated through the comparison with the electromagnetic simulation results. It is shown that the bandpass configuration of microstrip-line-coupled DSR can be used to design higher order bandpass filters. The design procedure is explained by developing a third-order filter prototype. The designed filter shows more than 57-dB common-mode rejection within the differential passband.
引用
收藏
页码：129 / 131
页数：3
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