Theoretical Demonstration of millimeter wave lens antenna

This article manifests the application of a transmissive metasurface for gain augmentation of a microstrip patch antenna operating at 35.7 GHz, from 6.9 dBi to 10.6 dBi in both E and H planes. First a planar metalens is constructed by placing unit cells of different dimensions which cover a wide phase range. The microstrip antenna is placed at the focus of the planar lens. The ratio of focal length to the diameter of the proposed lens is 0.2. Another conformal metasurface is designed using the unit cells of the planar lens but arranged in a different sequence which causes beam steering of the microstrip patch antenna at two specific angles -20° and 50°. The proposed antenna is therefore a potential candidate for 5G applications.