Design of transmissive huygens metasurface using modified cross and patch structure

We design a transmission type Huygens metasur-faces by incorporating modified non-resonant structures as a unit cell element. With planar cross metal structures as middle layer and patch structure as two outer layers, metasurfaces having high transmissive characteristics can be realized. The dimension of each layer element has been optimized numerically to obtain full phase control of transmitted wave. With the combination of electric and magnetic dipoles in the metasurface unit cell, high efficiency can be obtained, while simpler patch geometry used as outer layer provide an easier fabrication procedure. The three layers of metasurface unit cell are realized by two bonded PCB substrates and three etched metallic layer, compatible with standard photo/mask etching fabrication technique.