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2022-04-22
Broadband Phase Shifter with Constant Phase Based on Negative Group Delay Circuit
By
Yuwei Meng,

    Dr. Yuwei Meng

    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

Shao-Jun Fang,

    Prof. Shao-Jun Fang

    Information Engineering College

    Dalian Maritime University

    China

    Homepage

Hongmei Liu

    Professor Hongmei Liu

    School of Information Science and Technology

    Dalian Maritime University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 103, 161-169, 2022
doi:10.2528/PIERL22031301 | Google Scholar

Abstract
A broadband phase shifter (PS) with a constant phase based on a negative group delay (NGD) microwave circuit is proposed. The presented broadband PS is composed of distributed microstrip lines and two resistors, which is based on the positive group delay compensation principle. By tuning the electrical length of the phase shift transmission line, the constant phase can be obtained in the range of -360° ~ 0°. For verification, three broadband PSs with the phase shift of -90°, -180°, and -270° (90°) are designed, fabricated, and measured at the center frequency of 1.0 GHz. The measurements show that the -90° PS can achieve a constant phase of -90°±3.0° with a fractional bandwidth (FBW) of 73.1%; the -180° PS can achieve a constant phase of -180°±5.0° with an FBW of 51.1%; and the -270° PS can achieve a constant phase of -270°±4.0° with an FBW of 40.4%. Besides, the return loss is greater than 13.6 dB in the flat-phase bands.
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Citation
Yuwei Meng, Zhongbao Wang, Shao-Jun Fang, and Hongmei Liu, "Broadband Phase Shifter with Constant Phase Based on Negative Group Delay Circuit," Progress In Electromagnetics Research Letters, Vol. 103, 161-169, 2022.
doi:10.2528/PIERL22031301
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