Compact Hairpin Resonator Bandpass Filters with Dual-Band Response and Wide Upper Stopband

被引：0
作者：
Hsieh, Ping-Yueh [1 ,2 ]
Chiou, Yi-Chyun [1 ,2 ]
Kuo, Jen-Tsai [1 ,2 ]
Lok, U. Hou [1 ,2 ]
机构：
[1] Natl Chiao Tung Univ, Inst Commun Engn, 1001 Tahsueh Rd, Hsinchu 300, Taiwan
[2] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu 300, Taiwan
来源：
APMC: 2009 ASIA PACIFIC MICROWAVE CONFERENCE, VOLS 1-5 | 2009年
关键词：
bandpass filter; dual-band; hairpin resonator; transmission zero; wide stopband; COUPLED MICROSTRIP FILTERS; PASSBAND RESPONSE; DESIGN; SUPPRESSION;
D O I：
暂无
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：
Compact bandpass filters are devised with a dual-passband response and a wide upper stopband based on hairpin resonators with three shunt open stubs; one is tapped at its center and the other two are allocated on both sides symmetrically. By adjusting the stub lengths, all resonators are designed to have two identical leading resonant frequencies but different higher-order ones. To enhance the rejection level and extend the upper stopband, the transmission zeros created by the tap structures and the coupled-line stages are used to eliminate the remaining leading unwanted peaks. In addition, a method for reducing the radiation loss in upper stopband is investigated. Measured results show that the fifth-order filter has a rejection level below 30 dB can be extended to six times the first frequency. Good agreement between measured and simulation is obtained.
引用
收藏
页码：917 / +
页数：2
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