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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2020-01-03
Miniaturized Branch-Line Coupler with Wide Upper Stopband Using Right-Angled Triangle Artificial Transmission Line
By
Lin Geng,

    Dr. Lin Geng

    Air-Defense and Anti-Missile Institute of Air Force Engineering University

    China

    Homepage

Guang-Ming Wang,

    Professor Guang-Ming Wang

    Air and Missile Defense College

    Air Force Engineering University

    China

    Homepage

Bin-Feng Zong,

    Dr. Bin-Feng Zong

    Air-Defense and Anti-Missile Institute of Air Force Engineering University

    China

    Homepage

Mao-Kai Hu,

    Dr. Mao-Kai Hu

    Air-Defense and Anti-Missile Institute of Air Force Engineering University

    China

    Homepage

Hui-Yong Zeng

    Dr. Hui-Yong Zeng

    Air Force Engineering University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 88, 137-142, 2020
doi:10.2528/PIERL19101802 | Google Scholar

Abstract
Based on a novel right-angled triangle artificial line, a branch-line coupler is designed in this letter. The measured results indicate that the proposed branch-line operates at 0.975 GHz with a stopband bandwidth more than 15fc. Here, fc is the center frequency of the coupler. Importantly, the suppression levels in the stopband are better than 15 dB. Besides, its occupied size is about 23.18×22.5 mm2, which is only 16.5% of a traditional one at the same operating band. In practice, the proposed branch-line coupler can be used in compact systems which require good high-order harmonic suppression.
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Citation
Lin Geng, Guang-Ming Wang, Bin-Feng Zong, Mao-Kai Hu, and Hui-Yong Zeng, "Miniaturized Branch-Line Coupler with Wide Upper Stopband Using Right-Angled Triangle Artificial Transmission Line," Progress In Electromagnetics Research Letters, Vol. 88, 137-142, 2020.
doi:10.2528/PIERL19101802
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