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A hairpin line wideband bandpass filter design with embedded open stubs

✍ Scribed by Cheng-Yuan Hung; Min-Hang Weng; Yan-Kuin Su; Ru-Yuan Yang

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
177 KB
Volume
49
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

In this paper, a compact three‐poles hairpin line wideband bandpass filter with several embedded open stubs to improve the stopband is designed and implemented on print circuit board substrate. This filter at center frequency f~0~ of 4.25 GHz has presented almost very good measured characteristics, including the bandwidth of 3.1–5.4 GHz (3‐dB fractional bandwidth of 54%), low insertion loss of −0.7 ± 0.4 dB, sharp rejection due to two transmission zeros in the passband edge created by interstage coupling, and wide stopband rejection greater than 15 dB from 5.6 to 11 GHz. Experimental results of the fabricated filter show a good agreement with the predict results. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 934–936, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22302

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