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Dual-band filter design of combined half and quarter wavelength SIRs for WLAN applications

✍ Scribed by Pow-Wen Chen; Hao-Hung Ho; Min-Hua Ho; Ching-Her Lee

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
148 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This article presents a dual‐band bandpass filter composed of λ/2 and λ/4 stepped impedance resonators for the wireless local area network applications. The filter covers both the operating frequencies of 2.45 GHz and 5.2‐5.8 GHz. The doubly parallel‐coupling mechanism is used in the filter design to reduce the insertion losses and to gain a wider bandwidth. The cross coupling configuration and the tapped‐line I/O feed are adopted in this filter design to provide the attenuation poles for improving the signal selectivity and stopband rejection levels. Experiments were conducted to verify the circuit performance. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 13–15, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22979

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