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Miniaturized microstrip cross-coupled bandpass filter using novel stepped impedance resonators with a desirable upper stopband

✍ Scribed by Guohua Zhao; Changjun Liu

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 169 KB
Volume: 50
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.23343

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✦ Synopsis

Abstract

A miniaturized microstrip cross‐coupling bandpass filter using new stepped impedance resonators (SIRs) with simultaneous suppression of the 2nd harmonic passband response is presented. Four improved and miniaturized SIRs constitute the compact filter, which exhibits a sharp transition band due to two transmission zeros at both sides of the passband. Two quarter‐wavelength open‐ended stub resonators are applied to provide extra transmission zeros for suppressing the 2nd harmonic passband. A bandpass filter with a center frequency at 2.5 GHz was designed and fabricated, of which experimental results validated the proposed filter design. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1270–1273, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23343

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