A Phase-calibrated Computational Imaging Method Based on Programmable Metasurface

Microwave metasurface antenna has achieved considerable development recently, which provides a new path to realize computational imaging. In this paper, a single-frequency microwave computational imaging scheme based on programmable metasurface is introduced. Then the influences of phase errors in echo signal on imaging performance are discussed. In order to calibrate the phase errors, a phase calibration imaging method combining the Kaczmarz phase retrieval algorithm and computational imaging algorithm is proposed. Simulation results show that the proposed method could reconstruct the image commendably under the perturbation of phase errors existing in the echoes.