This article introduces leaky-wave metasurface antennas operating at micro/millimeter-wave frequencies, designed using quasi-bound states in the continuum. By carefully breaking spatial symmetries with tailored perturbations, the researchers achieve pointwise control over amplitude, phase, and polarization of the metasurface aperture fields. Prototypes demonstrate functionalities like single-input multi-output (SIMO) and multi-input multi-output (MIMO) near-field focusing, and far-field beam shaping, advancing wireless communication capabilities.

Gengyu Xu, Adam Overvig, Yoshiaki Kasahara, Enrica Martini, Stefano Maci, Andrea Alù