DESIGN OF AN ULTRA-WIDEBAND BANDPASS FILTER BY USING COUPLED THREE LINE MICROSTRIP STRUCTURE

被引：6

作者：

Weng, M. -H. ^{[2
,3
]}

Huang, C. -Y. ^{[4
]}

Hung, C. -Y. ^{[1
]}

Lan, S. -W. ^{[4
]}

机构：

[1] Tung Fang Design Univ, Dept Elect Engn & Comp Sci, Kaohsiung 829, Taiwan

[2] So Taiwan Univ, Dept Electroopt Engn, Tainan 710, Taiwan

[3] Met Ind Res & Dev Ctr, Med Devices & Optoelect Equipment Dept, Kaohsiung 82151, Taiwan

[4] Natl Univ Tainan, Dept Elect Engn, Tainan 700, Taiwan

来源：

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2012年 / 26卷 / 5-6期

关键词：

RESONATORS; DIPLEXER;

D O I：

10.1080/09205071.2012.710798

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：

In this paper, an ultra-wideband bandpass filter was accomplished. The proposed filter is constructed by using a coupled three line microstrip structure and a stepped-impedance open stub (SIOS), connected at the symmetrical plane of the filter to increase the passband selectivity. The measured result shows the centered frequency of the passband at 3.97GHz with low insertion loss of 0.48 dB and wide 3-dB fractional bandwidth (FBW) of 45.3% from 3.1GHz to 4.9GHz. Two transmission zeros are obtained near the passband at 2.72GHz and 5.71GHz with good rejection level of 50.3 dB and 60.5 dB, respectively. The measured results of the fabricated ultra-wideband bandpass filter also show a good agreement with the simulated ones.

引用

页码：716 / 728

页数：13

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