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Harmonic suppression of bandpass filters using open-circuited stubs

✍ Scribed by Lih-Shan Chen; Wen-Jeng Lin; Tsung-Hui Huang; Mau-Phon Houng; Shen-Li Fu

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
277 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

In this article, a cascaded bandstop filter using quarter‐wavelength open‐circuited stub structure is employed to suppress the spurious passband at the second harmonic of the bandpass filter. The center frequency of the fabricated bandpass filter is at 0.9 GHz and the fractional bandwidth is 5%. The proposed bandpass filter shows 30 dB rejection at the second harmonic during the frequency range from 1.1 to 10 GHz. The measured frequency responses of the fabricated filter are in agreement with simulated results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 863–865, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23226

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