Reconfigurable metasurface aperture for integrated compressive electromagnetic sensing and imaging

In this paper, a reconfigurable metasurface aperture (RMA) is proposed for integrated compressive electromagnetic sensing and imaging (ISAI) applications. The proposed RMA consists of randomly distributed switchable meta-atoms with two orthogonal orientations to enable dual-polarized radiation. The meta-atoms are loaded with PIN diodes, and by reconfiguring their operating states, the meta-atoms are selectively deactivated or activated. This dynamic mechanism is used to reconfigure the aperture state of metasurface and generate spatially lowcorrelated radiation patterns. These patterns serve as measurement modes for ISAI implementation. The performance of RMA is characterized using the reflection coefficient (S11) to assess the antenna behavior, and the correlation coefficient (CC) and the singular value (SV) spectrum to evaluate the spatial orthogonality of its measurement modes. An RMA-based ISAI study is conducted to validate the proposed design, in which the incident angles of far-field sources are accurately estimated and both the image and orientation of a target are successfully retrieved, confirming the effectiveness of the approach.<br/><br/>