A wide-band continuous-beam-scanning leaky-wave antenna with a stable gain fed by spoof surface plasmon polaritons
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1.Engineering Research Center of Communication Devices and Technology, Ministry of Education,School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;2. Shanghai University, Shanghai 200072, China

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    Abstract:

    A leaky-wave antenna (LWA) supporting wide-band and continuous-beam scanning is proposed in this paper. It is based on a spoof surface plasmon polariton (SSPP) transmission line (TL) periodically loaded with circular patches. The optimized antenna structure enables its continuous-beam scanning of 69° from backward through broadside to forward with a stable high radiation gain as the operating frequency increases from 7 GHZ to 15 GHz (with a relative bandwidth of 72.73%). Furthermore, a perfect electronic conductor (PEC) reflector is added at a distance of about 0.3λ0 (λ0 is the vacuum wavelength for the broadside radiation) to improve the antenna gain, achieving a gain increase of about 3 dB. The proposed LWA is expected to find applications in planar wireless communication systems.

    Reference
    [1] KAIVANTO E K, BERG M, SALONEN E, et al. Wearable circularly polarized antenna for personal satellite communication and navigation[J]. IEEE transactions on antennas propagation, 2011, 59(12):4490-4496.
    [2] HAO Z C, ZHANG J, ZHAO L. A compact leaky-wave antenna using a planar spoof surface plasmon polariton structure[J]. International journal of RF and micro-wave
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CHAI Bo, LI Yajing, BAI Yukun. A wide-band continuous-beam-scanning leaky-wave antenna with a stable gain fed by spoof surface plasmon polaritons[J]. Optoelectronics Letters,2022,18(4):210-214

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History
  • Received:August 27,2021
  • Revised:October 04,2021
  • Online: April 27,2022
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