Design of the Compact Wideband Bandpass Filter With Low Loss, High Selectivity and Wide Stopband

被引：41

作者：

Chang, Yu-Chi ^{[1
]}

Kao, Chia-Hsiung ^{[1
]}

Weng, Min-Hang ^{[2
]}

Yang, Ru-Yuan ^{[3
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Elect Engn, Kaohsiung 804, Taiwan

[2] Natl Nano Device Labs, Tainan 74147, Tainan County, Taiwan

[3] Natl Ping Tung Univ Sci & Technol, Dept Mat Engn, Pingtung 912, Taiwan

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2008年 / 18卷 / 12期

关键词：

Attenuation poles; filter; stepped impedance resonator (SIR); wideband;

D O I：

10.1109/LMWC.2008.2007691

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 letter, a novel compact wideband bandpass filter using the asymmetric stepped-impedance resonator (SIR) with one step discontinuity is designed and implemented to achieve characteristics of low loss, wide stopband and very high passband selectivity, simultaneously. The first two resonant modes of the asymmetric SIR are coupled together and applied to create a wide passband. The design procedure is discussed in detail. The proposed filter at center frequency f(o) of 4 GHz has very good measured characteristics including a low insertion loss of 0.5 +/- 0.3 dB, the bandwidth of 2.9-5.3 GHz, sharp rejection due to two transmission zeros in the passband edge. Experimental results of the fabricated filter show a good agreement with the predict results.

引用

页码：770 / 772

页数：3

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