Low Profile Electromagnetic Functional Metasurfaces with Passband Switchable Function

This paper proposes a multifunctional switching electromagnetic functional metasurfaces based on PIN diodes, which has the advantages of low profile and angular stability, and is suitable for fast switching in different passbands. By cascading a two-layer non resonant structure, it has a dual transmission passband (6.5-7.0 GHz and 11.9-12.8 GHz) in the "off state" and a single transmission passband (9.5-10.5 GHz) in the "open state". After simulation, both functions ensure a 70% transmittance (within a 45 ° incidence angle range) at a profile height of 1mm, and have a high cutoff state outside the passband.