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Microstrip dual-band bandpass filter using slow-wave resonators for WLAN applications

✍ Scribed by Xuehui Guan; Zhewang Ma; Peng Cai; Tetsuo Anada; Gen Hagiwara

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
166 KB
Volume
49
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A dual‐band bandpass filter using microstrip slow‐wave resonators is developed for wireless local area network applications. The fundamental and higher order resonant harmonics of a microstrip open‐loop resonator are analyzed against the length of the loading open stub. Then a dual‐band bandpass filters is designed in the form of slow‐wave open‐loop resonators. A zero‐degree feed structure is employed to produce transmission zeros near the passband to increase the rate of attenuations, and a quarter‐wavelength feed line for impedance matching is added to get desired external quality factor at the input and output. The theoretical analysis and design procedures are successfully verified by experimental results. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 14–16, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22055

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