DESIGN OF A WIDE-STOPBAND BANDPASS FILTER BY USING DIFFERENT FEEDING POSITIONS OF THE I/O PORTS

被引：16
|
作者：
Hung, C-Y [2 ]
Wene, M-H [3 ]
Lan, S-W [1 ]
Huang, C-Y [1 ]
机构：
[1] Natl Univ Tainan, Dept Elect Engn, Tainan 700, Taiwan
[2] Tung Fang Design Univ, Dept Elect Engn & Comp Sci, Kaohsiung 829, Taiwan
[3] Met Ind Res & Dev Ctr, Med Devices & Optoelect Equipment Dept, Kaohsiung 82151, Taiwan
来源：
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2012年 / 26卷 / 01期
关键词：
STEPPED-IMPEDANCE RESONATORS; SPURIOUS RESPONSES; MODE SUPPRESSION; COMPACT; PERFORMANCE; DIPLEXER; SIR;
D O I：
10.1163/156939312798954919
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, a wide-stopband bandpass filter is presented. The proposed filter only used two stepped-impedance resonators (SIRs) with a simple electric-coupling structure to accomplish a wide-stopband response. The passband of the proposed filter is designed for global system for mobile communications (GSM) at 1.8 GHz. The Spurious responses of the SIRs are suppressed by controlling the locations of the transmission zeros effectively. The measured results show the passband at 1.8 GHz with a low insertion loss 1.18 dB, and the 3 dB fractional bandwidth (FBW) of 14.1%. The rejection of the stopband is greater than 14 dB from 2.1 to 17.7 GHz, a stopband bandwidth of 9.8 times of the fundamental frequency. The measured result of the fabricated filter also shows a good agreement with the simulated result.
引用
收藏
页码：12 / 23
页数：12
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