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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2022-06-21
A Novel DGS-Based Substrate Integrated Coaxial Line Bandpass Filter with Three Transmission Zeros
By
Zhongbao Wang,

    Dr. Zhongbao Wang

    School of Information Science and Technology

    Dalian Maritime University

    China

    Homepage

Jian Ma,

    Dr. Jian Ma

    School of Information Science and Technology

    Dalian Maritime University

    China

    Homepage

Shipeng Zhao,

    Dr. Shipeng Zhao

    School of Information Science and Technology

    Dalian Maritime University

    China

    Homepage

Hongmei Liu,

    Professor Hongmei Liu

    School of Information Science and Technology

    Dalian Maritime University

    China

    Homepage

Shao-Jun Fang

    Prof. Shao-Jun Fang

    Information Engineering College

    Dalian Maritime University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 105, 1-8, 2022
doi:10.2528/PIERL22050801 | Google Scholar

Abstract
A novel high-selectivity bandpass filter based on a defected ground structure and substrate integrated coaxial line is proposed. Three transmission zeros near the passband are achieved by introducing a divergent-shaped resonator and two spindle-shaped defected ground structures, resulting in a high selectivity. To verify the proposed structure, one prototype with a center frequency of 4.94 GHz is designed and fabricated. The measured results show that three transmission zeros respectively located at 3.92, 4.36, and 6.00 GHz are obtained. The 3-dB passband bandwidth is 14.2% from 4.59 to 5.29 GHz. The upper stopband rejection is better than 20 dB from 5.71 to 11.31 GHz.
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Citation
Zhongbao Wang, Jian Ma, Shipeng Zhao, Hongmei Liu, and Shao-Jun Fang, "A Novel DGS-Based Substrate Integrated Coaxial Line Bandpass Filter with Three Transmission Zeros," Progress In Electromagnetics Research Letters, Vol. 105, 1-8, 2022.
doi:10.2528/PIERL22050801
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