Characterization of extremely low profile patch antenna loaded with periodic diamond metasurface ground plane

Abstract

AbstractThe characterization of an extremely low profile patch antenna is studied which is loaded with periodic diamond metasurface ground plane. Compared with conventional patch antenna, the new antenna has a smaller patch size, increased bandwidth, and enhanced efficiency. These performances are numerically investigated and optimized. By loading an optimal metasurface structure, a particular patch antenna is demonstrated in experiments. Measured results show that the metasurface antenna is in extremely low profile of 0.0045λ0. The patch length is 0.245λ0 or 0.36λg which is far beyond the 0.5λg limitation associated with a conventional prototype. In addition, the metasurface antenna has an impedance bandwidth of 1.83% and radiation efficiency of 83% in measurement. These two parameters are observed to be limited at level of 0.69% and 69%, respectively for a conventional patch antenna.