Wideband Bandpass Filter with Multiple Transmission Zeros Using a Shorted Stub-Loaded Stepped-Impedance Ring Resonator

被引：1
|
作者：
Yang, Qian [1 ]
Jiao, Yong-Chang [1 ]
Zhang, Zheng [1 ]
Wang, Nan [2 ]
机构：
[1] Xidian Univ, Natl Key Lab Antennas & Microwave Technol, Xian 710071, Shaanxi, Peoples R China
[2] State Grid Shaanxi Elect Power Res Inst, Xian 710100, Shaanxi, Peoples R China
来源：
PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS | 2016年 / 62卷
关键词：
D O I：
10.2528/PIERL16080101
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 wideband bandpass filter with multiple transmission zeros using a shorted stub-loaded stepped-impedance ring resonator is proposed. The resonant characteristics are investigated by evenandodd-mode analysis. In order to obtain a wideband response, the even resonant frequencies can be lowered by the shorted stub and the stepped-impedance ring. The transmission line theory is used to analyze the transmission zeros. Besides the parameters of the shorted stub and stepped-impedance ring, the transmission zeros can also be adjusted by the port separation angle. To verify the proposed design concept, a filter with 132% 3 dB fractional bandwidth and five transmission zeros in the upper stopband is designed, simulated, and fabricated. Good agreement is observed between the simulated and measured results.
引用
收藏
页码：23 / 28
页数：6
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