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A miniaturized narrowband bandpass filter with wide stopband using open-loop resonator

✍ Scribed by Li-Ying Feng; Hong-Xing Zheng

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
378 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

To obtain a very good performance of filter in wireless system, a miniaturized microstrip narrowband bandpass filter (BPF) is investigated based on an open‐loop resonator analysis. The newly designed BPF has been given with two advantages: one is of a compact size and the other is of a large ratio of the first spurious resonant frequency to the fundamental frequency. Then empirical designing equations of this structure have been discussed. The 3‐dB fractional bandwidth and selectivity of the filter can be selected flexibly by using those equations. Finally, a fabricated filter is applied to validating the proposed method. Experimental results are in very good agreement with simulations. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26206

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