A Multi‐Polarization Multi‐Band Reconfigurable Cloaking‐Illusion Metasurface

Abstract A switchable conformal‐skin cloak for multi‐polarization cloaking‐illusion is presented. Multi‐polarization electromagnetic cloaking‐illusion of the Poincaré sphere is analyzed and realized based on generalized Snell's law and Pancharatnam–Berry (PB) phase theory. The cloak achieves adaptive cloaking‐illusion with linearly polarized in X‐band (7.5–9.5 GHz) and circularly polarized in K‐band(16–20 GHz), respectively. To achieve a reconfigurable carpet cloak, structured water acting as a phase‐change material is introduced into the cell structure design, enabling reconfigurable reflection phases during circularly polarized excitation. This is the first time that a water structure is used instead of a phase‐change material to create a phase‐shifting invisibility cloak. Conformal integration samples are fabricated and tested by combining 3D‐printing technology and PCB fabrication technology, and the simulation results are in agreement with the experimental results. This method realizes switchable cloaking‐illusion. The impact of surface fabrication on electromagnetic properties are reduced using 3D printing. The approach is adaptable to terahertz and optical bands, providing crucial guidance for the integrated creation of cloaking‐illusion on arbitrary shapes.