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,(4):210-214
A wide-band continuous-beam-scanning leaky-wave antenna with a stable gain fed by spoof surface plasmon polaritons
Author NameAffiliation
CHAI Bo 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 
LI Yajing Shanghai University, Shanghai 200072, China 
BAI Yukun 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 
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.
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