Design of dual-band bandpass filter with closely spaced passbands and multiple transmission zeros

被引：7
|
作者：
Xiong Y. [1 ]
Wang L.T. [1 ]
Zhang W. [1 ]
Zhang F. [1 ]
Pang D. [1 ]
He M. [1 ,2 ]
Zhao X. [1 ]
Ji L. [1 ]
机构：
[1] College of Electronic Information and Optical Engineering, Nankai University, Tongyan Road No. 38, Jinnan District, Tianjin
[2] Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tongyan Road No. 38, Jinnan District, Tianjin
来源：
He, Ming (heming@nankai.edu.cn) | 1600年 / Electromagnetics Academy卷 / 70期
关键词：
Microstrip devices;
D O I：
10.2528/PIERL17062801
中图分类号：
TN713 [滤波技术、滤波器];
学科分类号：
摘要：
Two compact dual-band bandpass filters (BPFs) with closely spaced passbands are presented in this paper. Each of the filters consists of a stub loaded resonator, to which shorted lines are coupled. The ratio of the center frequencies of two passbands can be easily adjusted from 1.2 to 1.1 by changing the gap of the coupled line. In addition, seven transmission zeros (TZs) can be yielded to obtain high passband selectivity and enhance the out of band performances. As an example, two filters are designed, fabricated and measured. Both filters exhibit the merits of high passband selectivity, very low center frequency ratio, and wide stopband suppression. © 2017, Electromagnetics Academy. All Rights Reserved.
引用
收藏
页码：45 / 51
页数：6
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