Switchable all‐dielectric frequency selective surface based on dielectric resonators

Abstract

Here, the authors propose a switchable all-dielectric frequency selective surface (ADFSS), which is composed of two periodically placed high-permittivity dielectric resonator (DR) arrays. If the two DR arrays are laminated together, the FSS presents band-stop property; while if the two DR arrays are separated by a narrow gap, the FSS exhibits band-pass property. The switching characteristic of the device can be explained with DR theory and effective medium theory. The experimental results of the switchable ADFSS demonstrate a fractional bandwidth of 22.2% and a large field of view in a wide band (from 11.9 to 14.8 GHz), which is consistent with the simulated results. The method can be readily extended to the design of on/off ADFSS at other frequencies.