A 3-D Printed Wide-band Beam Steering Metalens Antenna for Millimeter-wave Applications

We proposed a mechanical 3-D printed wide-band beam steerable metalens antenna based upon Risley-prism beam steering theory. Manifesting the property of the flexibility and low cost of 3D printing technology, our proposed metalens antenna consists of all-dielectric concave-liked and convex-liked metalens to enhance the wide-band property. The paired antennas system performs 2-D beam steering while mechanically rotating the convex-liked and concave-liked metalens against each other. The simulation results reveal that the beam could scan from 0° to 21° with the −3dB bandwidth of 37.8% between 75 GHz to 110 GHz. The peak realized gain is 22.2 dBi, and the minimum of scanning loss is 0.9 dBi.