Design of single-layer high-efficiency transmitting phase-gradient metasurface and high gain antenna

Di Zhang, Xiaoqing Yang, Piqiang Su, Jiefang Luo, Huijie Chen, Jianping Yuan, Lixin Li

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

In this paper, based on rotation phase-gradient principle, a single-layer, high-efficiency transmitting metasurface is designed and applied to high-gain antenna. In the case of circularly polarized incident wave, the PCR (polarization conversions ratio) of the metasurface element is greater than 90% in the band of 9.11–10.48 GHz. The transmitting wave emerges an anomalous refraction when left-handed circularly polarized wave are incident perpendicularly to the 1D phase-gradient metasurface, which is composed of cycle arrangement of 6 units with step value of 30°. The simulated anomalous refraction angle is 40.1°, coincided with the theoretical design value (40.6°). For further application, the 2D focused metasurface is designed to enhance the antenna performance while the left-handed circularly polarized antenna is placed at the focus. The simulated max gain is increased by 12 dB (182%) and the half-power beamwidth is reduced by 74.6°. The measured results are coincided with the simulations, which indicates the antenna has high directivity. The designed single-layer transmission metasurface has advantages of thin thickness (only 1.5 mm), high efficiency and light weight, and will have important application prospects in polarization conversion and beam control.

Original languageEnglish
Article number495104
JournalJournal of Physics D: Applied Physics
Volume50
Issue number49
DOIs
StatePublished - 14 Nov 2017

Keywords

  • High gain antenna
  • Metasurface
  • Nomalous refraction
  • Phase-gradient

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