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Application of microstrip cavity couplers for wideband bandpass filters

✍ Scribed by Jui-Ching Cheng; Eric S. Li; Chin-Chung Chuang

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

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✦ Synopsis

Abstract

This article presents a design for wideband bandpass filters using a microstrip cavity coupler. The broadband nature of the cavity‐coupled designs is fully exploited for this application. Two additional circuits are introduced to improve the stopband performance of the cavity‐coupled bandpass filter. A prototype design example is presented with its center frequency located at 6.28 GHz. The design has the merits of wide bandwith of more than 140%, flat group delay within the passband, good insertion/return loss, and stopband attenuation of nearly 30 dB up to 30 GHz. The validity of the simulation results is verified experimentally. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2814–2817, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26410

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