Direction-of-Arrival Estimation by a Programmable Metasurface

We propose a methodology for estimating the direction of arrival (DOA) by a programmable metasurface exploited as an electronically scanned virtual parabolic reflector. Each parabolic reflector configuration fixes its own reception angle, making the incident beams converge to the common focal point where the receiving antenna is located. The DOA is estimated by finding the maximum power recovered by the receiving an-tenna. Experimental measurements are conducted in an anechoic chamber to validate the proposed method.