Compressive Imaging and Direction of Arrival Estimation using Reconfigurable Metasurface Apertures

This paper presents the concept of reconfigurable metasurface apertures as an enabling technology to facilitate physical layer compression for imaging and direction of arrival (DoA) estimation at microwave frequencies. Two different techniques are presented to spatially control the radiated field patterns and generate spatio-temporally incoherent measurement bases to replace the conventional array based raster scanning techniques. Leveraging the physical layer compression, high quality radar imaging and DoA estimation have been achieved, using only two channels for imaging and a single channel for DoA estimation.