One-dimensional beam-steering Fabry-Perot cavity (FPC) antenna with a reconfigurable superstrate

In this work, a new reconfigurable discrete 1D beam-steering Fabry-Perot cavity antenna with enhanced radiation performance is presented. It consists of a probe-fed patch antenna printed on the ground plane and a reconfigurable metasurface acting as the upper partially reflective surface to realize beam steering. By utilizing 6 x 6 proposed reconfigurable unit cells on the superstrate, the beam-steering angle can be effectively enhanced from +/- 7 degrees to +/- 17 degrees with fewer active elements and a much simpler biasing network. The proposed antenna was fabricated to validate the feasibility. Good agreement between the simulated and measured results is achieved. Moreover, the measured realized gains are over 11 dBi with a gain variation from the boresight direction to the tilted direction <0.2 dBi.