A Dual-Mode Dual-Band Bandpass Filter Using a Single Ring Resonator

被引：0
|
作者：
Luo, Sha [1 ]
Zhu, Lei [1 ]
Sun, Sheng [2 ]
机构：
[1] Nanyang Technol Univ, Sch Elect & Elect Engn, 50 Nanyang Ave, Singapore 639798, Singapore
[2] Univ Ulm, Inst Microwave Tech, D-89069 Ulm, Germany
来源：
APMC: 2009 ASIA PACIFIC MICROWAVE CONFERENCE, VOLS 1-5 | 2009年
关键词：
Bandpass filter; dual-mode; dual-band; ring resonator; open-circuited stubs; DEGENERATE MODES;
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：
A dual-mode dual-band bandpass filter with two poles in both of dual-passbands is presented with the proper stub-loading and external-excitation of a single microstrip ring resonator. By placing two excited ports at the 135 degrees-separated positions along a uniform ring resonator, two 1(st)-order degenerate modes, TM10 and TM01, can be simultaneously excited and they are split to produce two transmission poles in the 1(st) passband. Meanwhile, two 2(nd)-order degenerate modes, TM20 and TM02, are split by attaching four identical open-circuited stubs to the ring in a symmetrical manner with respect to two external ports. Thus, two transmission poles can be generated in both of dual passbands as demonstrated in theory. Finally, a compact dual-band ring resonator filter is designed and fabricated to operate at 2.3 and 4.8 GHz and its predicted results are verified in experiment.
引用
收藏
页码：921 / +
页数：3
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