A pattern reconfigurable antenna based on metasurface

In order to meet the increasing demand for multi-functional antennas, a low-profile reconfigurable antenna based on a metasurface coating is proposed. The antenna consists of three parts, namely a rectangular mushroom metasurface coating, a slot-coupled antenna and a simple DC bias control circuit. By separately adjusting the working states of the two groups of PIN switches, the current on the antenna radiation surface is changed, thereby realizing the reconstruction of the radiation pattern. Through simulation calculations and optimizations, the optimal structure of the antenna is finally determined. The actual measurement results show that the antenna can work in four different states, and its xoz-plane pattern can be switched between ±30°. At the same time, the −10 dB impedance bandwidth of the four working states overlap measurement is 4.2%. The antenna has the characteristics of low profile, high gain, low cost, and easy operation.