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Design of triple-mode bandpass filter using novel resonant structure

✍ Scribed by Shao-Guo Mo; Zhi-Yuan Yu; Long Zhang

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
294 KB
Volume
52
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A novel triple‐mode hexagonal bandpass filter with capacitive loading is introduced in this article.The technique, adding an open stub with capacitive loading, is applied to enlarge the equivalent self‐capacitance of the resonator, which declines its resonant frequencies. A circular patch on the bottom layer is used to implement this technique. One‐mode resonant frequency is varied with the radius of the circular patch, whereas the other two modes are nearly not affected. This filter has a pair of transmission zeros, which are close to the passband, thus behaving a high selectivity. For method validation, a bandpass filter operating at 2.45 GHz is fabricated and measured. The experimental results are demonstrated and discussed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:849–852, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25035

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