Inverse-Designed Holographic Surfaces for Multi-Focus Spatial Beamforming
This talk presents a holographic antenna system that operates as a time-reversal mirror to achieve multi-focus near-field beamforming with interference suppression. Using an inverse design framework and a dipole-based channel matrix, the system synthesizes and encodes target wavefronts onto a holographic surface through time-reversal impedance modulation. A Gram–Schmidt–based interference-cancellation algorithm further enhances spatial resolution between closely spaced beams. Simulations demonstrate flexible beam shaping, spatial selectivity, and nulling for single- and multi-user scenarios, enabling applications in secure communications, wireless power transfer, and adaptive sensing.
