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2015-04-10
A Compact Wideband Bandpass Filter Using a Coupled-Line Quad-Mode Resonator
By
Lixia Nan,

    Dr. Lixia Nan

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Yongle Wu,

    Prof. Yongle Wu

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Weimin Wang,

    Dr. Weimin Wang

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Shulan Li,

    Dr. Shulan Li

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Yuan'an Liu

    Dr. Yuan'an Liu

    School of Telecommunication Engineering,

    Beijing University of Posts and Telecommunications

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 53, 7-12, 2015
doi:10.2528/PIERL15020201 | Google Scholar

Abstract
A novel, compact wideband bandpass filter based on an improved quad-mode resonator is proposed in this paper. Due to the usage of a coupled-line section, the resonator has a quad-mode behavior. The resonant frequencies can be tuned by regulating not only the electrical lengths, but also the characteristic impedances. Owing to the symmetry of the construction, even- and odd-mode analysis is utilized to analyze the proposed resonator. Finally, a wideband bandpass filter with 88% (2.1 to 5.4 GHz) relative bandwidth is designed, fabricated, and measured. The measured results are in good agreement with the simulated ones, which demonstrates the feasibility of the design approach.
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Citation
Lixia Nan, Yongle Wu, Weimin Wang, Shulan Li, and Yuan'an Liu, "A Compact Wideband Bandpass Filter Using a Coupled-Line Quad-Mode Resonator," Progress In Electromagnetics Research Letters, Vol. 53, 7-12, 2015.
doi:10.2528/PIERL15020201
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