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Bandpass filter of forked step impedance resonator with harmonic suppression in diplexer applications

✍ Scribed by Min-Hua Ho; Chung-I G. Hsu; Chen-Mao Rao

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

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✦ Synopsis

Abstract

A novel two‐stage forked stepped‐impedance‐resonator (FSIR) bandpass filter design is presented. The FSIR originated from an SIR has its both open ends split as a fork structure. A tunable zero from the coupled lines is created to suppress the second harmonic of the resonator. Two additional zeros obtained from using the asymmetric tapped‐line feed are used to improve the filter's frequency selectivity. A diplexer design based on the FSIR structure is presented. Experiments are conducted to verify the circuit design. Good agreements between the measurements and the simulations are observed. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2665–2668, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22813

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