COMPACT QUINTUPLE-MODE UWB BANDPASS FILTER WITH GOOD OUT-OF-BAND REJECTION

被引:10
作者
Deng, H. -W. [1 ]
Zhao, Y. -J. [1 ]
Zhang, X. -S. [1 ]
Zhang, L. [1 ]
Gao, S. -P. [1 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Coll Informat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China
来源
PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS | 2010年 / 14卷
关键词
D O I
10.2528/PIERL10030912
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 paper, a novel compact quintuple-mode UWB bandpass filter (BPF) with sharp rejection skirt and wide upperstopband performances is realized using stub-loaded multiple-mode resonator (MMR). The proposed resonator is formed by attaching two pairs of circular impedance-stepped open stubs in shunt and a pair of short-circuited stubs to high impedance microstrip line. By simply adjusting the radius of circular impedance-stepped open stubs and the lengths of short-circuited stubs, the first five resonant modes of the resonator can be roughly allocated within the 3.1-10.6 GHz UWB band meanwhile the high resonant modes in the upper-stopband can be suppressed. The short stubs in pairs can generate two transmission zeros near the lower and upper cut-off frequencies, leading to sharper rejection skirt outside the desired passband. Finally, a quintuple mode UWB BPF is designed and fabricated, and the measured results demonstrate the feasibility of the design process.
引用
收藏
页码:111 / 117
页数:7
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