A TRIPLE-MODE BANDPASS FILTER USING A MODIFIED CIRCULAR PATCH RESONATOR

被引：18
|
作者：
Serrano, Ariana L. C. [1 ,2 ]
Correra, Fatima Salete [1 ]
机构：
[1] Univ Sao Paulo, Microelect Lab Polytech Sch, BR-05424970 Sao Paulo, Brazil
[2] Omnisys Eng Ltda, BR-09571470 Sao Caetano do Sul, SP, Brazil
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2009年 / 51卷 / 01期
关键词：
microwave filters; bandpass filters; circular patch resonators; triple-mode resonators; CAVITIES;
D O I：
10.1002/mop.23950
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 article presents a triple-mode bandpass filter using a modified circular patch resonator. Etched slots in the resonator split the TM1, 1, 0z degenerate fundamental modes and also perturb the TM2, 1, 0z mode, approximating their resonant frequencies to form a third-order bandpass filter. A 2.42 GHz centered filter was designed and fabricated. Experimental results showed a fractional bandwidth of 29%, return loss better than 16 dB, insertion loss of 0.5 dB, and good second harmonic band rejection. The filter exhibited a size reduction of 51% compared with a filter using an unperturbed circular patch resonator at the same frequency. (C) 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 178-182, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23950
引用
收藏
页码：178 / 182
页数：5
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