TRANSMISSION ZERO DESIGN GRAPH FOR DUAL-MODE DUAL-BAND FILTER WITH PERIODIC STEPPED-IMPEDANCE RING RESONATOR

被引：53
作者：
Chiou, Y. -C. [2 ]
Yang, P. -S. [2 ]
Kuo, J. -T. [1 ]
Wu, C. -Y. [2 ]
机构：
[1] Chang Gung Univ, Dept Elect Engn, Taipei, Taiwan
[2] Natl Chiao Tung Univ, Inst Commun Engn, Hsinchu, Taiwan
来源：
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER | 2010年 / 108卷
关键词：
ANTENNA;
D O I：
10.2528/PIER10071608
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 dual-mode dual-band bandpass filters are realized with a single periodic stepped-impedance ring resonator. Neither extra resonator nor substrate layer is required for implementing the second passband. Based on the transmission line theory, a transmission zero design graph consisting of the transmission zeros together with the resonant frequencies of the resonator is developed against the space separation angle between the input and output ports. Based on this graph, when the line-to-ring feed structure is implemented, the space angle can be determined for the dual-mode dual-band design with designated zeros near the two passbands. It is believed that this is the first design graph for designating the transmission poles and zeros of a dual-mode ring resonator filter before the excitation structure is realized. Three dual-mode dual-band bandpass filters are carried out for demonstration. All circuits occupy only 60% of the area of the conventional ring resonator bandpass filter at the first frequency. Measured results of experimental circuits show good agreement with simulated responses.
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收藏
页码：23 / 36
页数：14
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