Wideband Ultrathin Huygens' Metasurface element for 5G Millimeter-Wave Applications

摘要

In this paper, a symmetric double-layer wideband ultrathin Huygens' metasurface unit is presented. This unit cell is a good candidate for flat lens antenna for 5G applications. In this work, the bandwidth of the element is improved 34% which primarily affect the flat lens antenna bandwidth. This structure consists of a symmetric copper double layer unit including square ring and fractal patch structure etched on the one substrate. The proposed unit-cell excites both electric and magnetic dipole resonances with mutual interference. The simulated results show a high transmission (−2dB criteria) and 200° phase control at the same time, which cannot be realized by unit structures with double-layer. The whole thickness of the unit is also $mathbf{0.046}lambda_{mathbf{0}}$ at mm-wave frequency of 28GHz.