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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-12-02
A Novel Balanced-to-Unbalanced All-Port Reflectionless Filtering Power Divider Without Loading Additional Absorptive Branches at Input and Output Ports
By
Qi Chen,

    Dr. Qi Chen

    School of Information Science and Technology

    Dalian Maritime University

    China

    Homepage

Huabin Zhang,

    Dr. Huabin Zhang

    School of Information Science and Technology

    Dalian Maritime University

    China

    Homepage

Zhongbao Wang,

    Dr. Zhongbao Wang

    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 M, Vol. 121, 157-167, 2023
doi:10.2528/PIERM23081404 | Google Scholar

Abstract
A novel balanced-to-unbalanced (BTU) all-port reflectionless filtering power divider without loading additional absorptive branches at input and output ports is proposed in this paper. The proposed power divider includes two reflectionless filtering networks, four transmission lines, a phase inverter, and two isolation resistors. Unlike the existing filtering power dividers that require additional absorptive branches to be loaded at each port to achieve reflectionlessness at all ports, the proposed power divider achieves all-port reflectionlessness by embedding only two reflectionless filtering networks in the BTU power dividing circuit. Meanwhile, this reflectionless filtering network also introduces two transmission zeros located at the lower and upper sides of the passband, respectively, for high selectivity. To validate the proposed power divider topology, a 2.0-GHz BTU filtering power divider is designed and fabricated with a 3-dB filtering bandwidth of 40.1%. The 10-dB reflectionless bandwidth for the balanced port is 98.7% from 0.940 to 2.772 GHz and that for the unbalanced ports covers the entire measurement frequency from 0.5 to 3.5 GHz, achieving good all-port reflectionless characteristics.
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Citation
Qi Chen, Huabin Zhang, Zhongbao Wang, Hongmei Liu, and Shao-Jun Fang, "A Novel Balanced-to-Unbalanced All-Port Reflectionless Filtering Power Divider Without Loading Additional Absorptive Branches at Input and Output Ports," Progress In Electromagnetics Research M, Vol. 121, 157-167, 2023.
doi:10.2528/PIERM23081404
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