Holographic Antenna with Low Surface Impedance Sensitivity Unit Cell

This paper proposes a holographic antenna using a single/double inter-digital shape unit cells that have a wide surface impedance range and reduce the surface impedance sensitivity on a high relative permittivity and a thin substrate. The proposed holographic antenna operates in 24 GHz, and the maximum gain of the holographic antenna with the proposed method is gain 8 dBi at 33°. Moreover, the proposed antenna satisfied the low surface impedance sensitivity.