An Ultra-low-profile Folded Transmitarray Antenna Based on Chain Huygens’ Metasurface

In this paper we propose an ultra-low-profile folded transmitarray antenna by combining the chain Huygens’ metasurface with stable angular performance and the folded TAA technology. Its focus-to-diameter (F/D) ratio just is 0.11. The simulated results also show acceptable radiation performance in the 28 GHz band, including a peak gain of 28.2 dBi, aperture efficiency of 30.6%, and 3-dB gain bandwidth of 6.68%.