Mechanically scanned leaky-wave antenna based on a topological one-way waveguide

Frontiers of Physics volume 15, Article number: 33601 (2020) Cite this article

Abstract

We propose a uniform backfire-to-endfire leaky-wave antenna (LWA) based on a topological one-way waveguide under external bias magnetic field. We systematically analyze the dispersion, showing that the proposed structure supports leaky mode arisen from total internal reflection. By means of tuning frequency or magnetic field, we obtain fixed-bias frequency and fixed-frequency bias LWA with continuous beam scanning from backward, broadside to forward direction. More importantly, we, for the first time, demonstrate that this proposed LWA shows mechanical tunability, allowing us to manipulate the radiation direction from backward, broadside to forward direction by mechanically tuning the air layer thickness. The simulated results show that our system exhibits super low 3dB beam width, high radiation efficiency as well as high antenna gain. Being provided such multiple controlled (especially mechanically) beam scanning manners, the present LWA paves an advanced approach for continuous beam scanning, holding a great potential for applications in modern communication and radar system.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC) (Grant No. 61372005), the National Natural Science Foundation of China (NSFC) under the key project (Grant No. 41331070), the Natural Science Foundation of Ningbo (No. 2019A610081), and Zhejiang Provincial Natural Science Foundation of China (No. LY20F050006).

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Affiliations

  1. Information Engineering School, Nanchang University, Nanchang, 330031, China

    Qian Shen

  2. Institute of Space Science and Technology, Nanchang University, Nanchang, 330031, China

    Qian Shen, Yun You, Jie Xu, Yun Shen & Xiaohua Deng

  3. Department of Photonics Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark

    Qian Shen & Sanshui Xiao

  4. Electronic and Information Engineering College, Ningbo University of Technology, Ningbo, 315016, China

    Zhuoyuan Wang

  5. School of Software, Nanchang University, Nanchang, 330031, China

    Weidong Min

  6. Department of Applied Physics, Zhejiang University of Technology, Hangzhou, 310023, China

    Linfang Shen

Authors
  1. Qian Shen
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  2. Yun You
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  3. Jie Xu
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  4. Yun Shen
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  5. Xiaohua Deng
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  6. Zhuoyuan Wang
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  7. Weidong Min
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  8. Linfang Shen
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  9. Sanshui Xiao
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Corresponding authors

Correspondence to Weidong Min or Sanshui Xiao.

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Shen, Q., You, Y., Xu, J. et al. Mechanically scanned leaky-wave antenna based on a topological one-way waveguide. Front. Phys. 15, 33601 (2020). https://doi.org/10.1007/s11467-020-0953-9

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Keywords

  • leaky-wave antenna
  • one-way waveguide
  • magneto-optic materials