The Influence of Geometries on Terahertz Metal Grid Metamaterial Lens

Metamaterial lens formed by metal grid is attracting much attention in millimeter wave antennas design. Different from millimeter wave applications, line width and thickness of the metal grid affect the lens antenna performance greatly when it comes to terahertz frequency bands. in this paper, general guides of designing and fabricating a metal grid metamaterial lens on terahertz frequency considering geometries are illustrated. The relation between plasma frequency of the metamaterial and line width of metal grid is studied at length and validated by electromagnetic simulation results. Advises are provided to design and fabricate terahertz metal grid metamterial lens.