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2011•Asia-Pacific Microwave ConferenceRequires access

Design of wide single-/dual-passband microstrip bandpass filters with comb-loaded resonators

Ching‐Wen Tang, Chien-Tai Tseng, Yen-Kuo Hsu

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Abstract

Novel microstrip bandpass filters with comb-loaded resonators are proposed. With comb-loaded resonators, the proposed bandpass filter can have a wide passband. In particular, dual passbands show up around 2.45 GHz and 5.75 GHz and their bandwidth is 780 MHz. In addition, by properly controlling passband's coupling coefficient, only one passband of the dual-passband bandpass filter will be generated in the lower/higher frequency band. Finally, the agreement between measured results and the theoretical prediction validates the proposed structure.

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What this paper is about

Novel microstrip bandpass filters with comb-loaded resonators are proposed. With comb-loaded resonators, the proposed bandpass filter can have a wide passband. In particular, dual passbands show up around 2.45 GHz and 5.75 GHz and their bandwidth is 780 MHz. In addition, by properly controlling passband's coupling coefficient, only one passband of the dual-passband bandpass filter will be generated in the lower/higher frequency band. Finally, the agreement between measured results and the theoretical prediction validates the proposed structure.

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Available abstract

Novel microstrip bandpass filters with comb-loaded resonators are proposed. With comb-loaded resonators, the proposed bandpass filter can have a wide passband. In particular, dual passbands show up around 2.45 GHz and 5.75 GHz and their bandwidth is 780 MHz. In addition, by properly controlling passband's coupling coefficient, only one passband of the dual-passband bandpass filter will be generated in the lower/higher frequency band. Finally, the agreement between measured results and the theoretical prediction validates the proposed structure.

Key concepts: Passband, Band-pass filter, Resonator, Prototype filter, Bandwidth (computing), Coupling coefficient of resonators, Transition band, Microstrip

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