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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-08-23
Design and Implementation of Compact Hybrid Four-Mode Bandpass Filter with Multi-Transmission Zeros
By
Xuehui Guan,

    Prof. Xuehui Guan

    School of Information Engineering

    East China Jiaotong University

    China

    Homepage

Xiaoyan Wang,

    Dr. Xiaoyan Wang

    School of Information Engineering

    East China Jiaotong University

    China

    Homepage

Bin Wang,

    Dr. Bin Wang

    School of Information Engineering

    East China Jiaotong University

    China

    Homepage

Ye Yuan,

    Dr. Ye Yuan

    School of Information Engineering

    East China Jiaotong University

    China

    Homepage

Hai-Wen Liu

    Professor Hai-Wen Liu

    School of Information Engineering

    East China Jiaotong University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 34, 65-74, 2012
doi:10.2528/PIERL12071501 | Google Scholar

Abstract
This paper presents a novel compact microstrip hybrid four-mode bandpass filter (BPF) with good selectivity and multi-transmission zeros. By adding an external resonator to a triple-mode stub-loaded uniform impedance resonator, four modes are generated in the desired passband and a hybrid four-mode BPF is implemented. Even- and odd-mode theory is introduced to investigate the mode characteristics of triple-mode resonator in detail. Circuit model and coupling matrix are built to further explain the proposed methodology. A microstrip BPF with central frequency of 3.4 GHz for wireless communication was designed and fabricated. Three transmission zeros are obtained at 3.2 GHz, 3.55 GHz and 3.73 GHz, which improve selectivity and out-of-band rejection of the filter. The measured results of the fabricated filter represent good in-band and sharp sideband characteristic, which match well with simulated results.
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Citation
Xuehui Guan, Xiaoyan Wang, Bin Wang, Ye Yuan, and Hai-Wen Liu, "Design and Implementation of Compact Hybrid Four-Mode Bandpass Filter with Multi-Transmission Zeros," Progress In Electromagnetics Research Letters, Vol. 34, 65-74, 2012.
doi:10.2528/PIERL12071501
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