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.

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