Reconfigurable metasurface with polarization-independent manipulation for reflection and transmission wavefronts

In this paper, we propose a real-time reconfigurable metasurface unit-cell working at dual-band with polarization-independent manipulation of reflection and transmission wavefronts. The transmission and reflection phases of the designed digital programmable active element can be dynamically adjusted by the states of the PIN diodes. The unit-cell can be designed to respond to different functions in different frequency bands, which makes it more flexible in radiation characteristics. Both the simulation and experiment show that the element can achieve good reconfigurable performances. This work offers a new method for real-time dynamic control of forward and backward electromagnetic wavefronts in the entire space.