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Novel Model Design of Compact Dual Notch-Bands of Attenuation for Bandpass Filters

Authors: Jamal. M. Rasool --- Saad H. Abdul Razzaq
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 10 Pages: 1955-1961
Publisher: University of Technology الجامعة التكنولوجية


In this paper, a new microstrip model design of bandpass filter isproposed. Open stubs are applied to the band pass filter to refine the skirtselectivity on both sides of the upper and lower frequency band. Twoattenuation poles are produced by this new structure. The upper band pole isintroduced by the hairpin-comb structure. The lower band pole is introducedby the tapped open stubs. We fabricated a new structure using millingmachine at the Lab in University of North Texas (UNT). Two attenuationpoles are realized at the upper band and the lower band respectively, one at1.71GHz and one at 1.93GHz. Sharp roll-off on both sides of the pass band isobtained. Measured results show good selectivity at both upper and lowerbands

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