Dual-Band Bandpass Filter With Wide Stopband Using One Stepped-Impedance Ring Resonator With Shorted Stubs

被引：44

作者：

Shi, Jin ^{[1
]}

Lin, Longlong ^{[1
]}

Chen, Jian-Xin ^{[1
]}

Chu, Hui ^{[1
]}

Wu, Xu ^{[1
]}

机构：

[1] Nantong Univ, Sch Elect & Informat, Nan Tong 226019, Jiangsu, Peoples R China

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2014年 / 24卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Dual-band bandpass filter (BPF); quad-mode resonator; shorted stubs; stepped-impedance ring resonator (SIRR); wide stopband;

D O I：

10.1109/LMWC.2014.2316259

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：

A novel stepped-impedance ring resonator (SIRR) with two pairs of shorted stubs is proposed to design a dual-band bandpass filter. The proposed resonator is a quad-mode resonator, and one resonator can realize a dual-band filter. The frequency space between two passbands and bandwidths of two passbands can be controlled by the shorted stubs. Wide out-of-band rejection can be achieved by selecting the desired impedance and length ratios and suitable feeding point to suppress some spurious resonant frequencies. A prototype filter centered at 1.395 and 1.825 GHz is designed with the first spurious response occurring at 7.84 GHz or 5.7 f(01) (f(01) is the center frequency of the first passband). Good agreement between the simulated and measured results can be observed.

引用

页码：442 / 444

页数：3

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