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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2018-05-14
Compact Microstrip Rotman Lens Using Chebyshev Impedance Transformers
By
Qiuyan Liang,

    Dr. Qiuyan Liang

    Xidian University

    China

    Homepage

Bao-Hua Sun,

    Dr. Bao-Hua Sun

    Xidian University

    China

    Homepage

Gaonan Zhou,

    Dr. Gaonan Zhou

    Xidian University

    China

    Homepage

Jianfeng Li

    Dr. Jianfeng Li

    KISEKI Auto (Zhejiang) Co. Ltd.

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 76, 1-6, 2018
doi:10.2528/PIERL18030702 | Google Scholar

Abstract
A compact microstrip Rotman lens is proposed in this paper. The microstrip Rotman lens consists of a lens body and Chebyshev impedance transformers. The Chebyshev impedance transformers are used as beam ports, array ports and dummy ports. Compared to the traditional linear tapered transition, the Chebyshev impedance transformer is shorter, which leads to the size reduction and insertion loss improvement for the Rotman lens. An X-band 4×7 Rotman lens using Chebyshev impedance transformers is designed and fabricated. Compared to a traditional Rotman lens, the proposed Rotman lens shows a size reduction of about 56% and an insertion loss improvement at 10 GHz. The measured results demonstrate that better than 15 dB return loss throughout the bandwidth from 8 to 12 GHz is obtained.
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Citation
Qiuyan Liang, Bao-Hua Sun, Gaonan Zhou, and Jianfeng Li, "Compact Microstrip Rotman Lens Using Chebyshev Impedance Transformers," Progress In Electromagnetics Research Letters, Vol. 76, 1-6, 2018.
doi:10.2528/PIERL18030702
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