Design of a Miniaturized, Low Profile, Broadband Metasurface Antenna

In this paper, a miniaturized, low-profile wideband metasurface antenna is proposed. The antenna consists of a uniformly arranged hexagonal metasurface, a Y-shaped antenna, a ground plane, and a microstrip line. The microstrip line feeds energy to the antenna through a gap on the ground plane, and the antenna radiates energy to the metasurface. Through the feed gap, different resonant modes are excited at the same time, so that the antenna presents the performance of broadband, and low profile is achieved by optimizing the structure of the metasurface and antenna. The simulation results show that the impedance bandwidth of the antenna is 4.45-6.73GHz (40.8
^%
), the total size is 0.6λ*0.6λ*0.065λ (where λ is the free space wavelength at the center operating frequency), the realized gain can reach 7.2dBi, the total efficiency is more than 88%, and the linear polarization characteristics are good in the operating band.