Multi-beam Energy-distributable Phase-encoding Metasurface

With the development of wireless communication, the demand for Integrated Sensing and Communication (ISAC) is increasing, which requires more flexible beam energy allocation. In order to solve the problem of uncontrollable multi-beam energy in traditional coding metasurfaces, a multi-beam energy-distributable phase-encoding metasurface is proposed. The 1-bit coding metasurface achieves stable dual-beam anomalous reflection through the phase gradient, and by overlaying different periods, it can realize four-beam anomalous reflection. Based on the array antenna theory, the optimization algorithm can be used to optimize the phase of different units, achieving energy allocation for symmetrical beams at desired angles. The results show that at 12 GHz and 16 GHz, symmetric dual beams and four beams with different energy distributions can be realized according to actual needs. The proposed metasurface has the features of stable characteristics, simple structure, wide working frequency band and flexible control mode, which can be applied in beamforming and other fields with broad application prospects.