Frequency Selective Surfaces: A Review

Abstract

The intent of this paper is to provide an overview of basic concepts, types, techniques, and experimental studies of the current state-of-the-art Frequency Selective Surfaces (FSSs). FSS is a periodic surface with identical two-dimensional arrays of elements arranged on a dielectric substrate. An incoming plane wave will either be transmitted (passband) or reflected back (stopband), completely or partially, depending on the nature of array element. This occurs when the frequency of electromagnetic (EM) wave matches with the resonant frequency of the FSS elements. Therefore, an FSS is capable of passing or blocking the EM waves of certain range of frequencies in the free space; consequently, identified as spatial filters. Nowadays, FSSs have been studied comprehensively and huge growth is perceived in the field of its designing and implementation for different practical applications at frequency ranges of microwave to optical. In this review article, we illustrate the recent researches on different categories of FSSs based on structure design, array element used, and applications. We also focus on theoretical breakthroughs with fabrication techniques, experimental verifications of design examples as well as prospects and challenges, especially in the microwave regime. We emphasize their significant performance parameters, particularly focusing on how advancement in this field could facilitate innovation in advanced electromagnetics.

Energy Selective Filter with Power-Dependent Transmission Effectiveness in Waveguide

“…Frequency selective surface (FSS), as the representative of metasurfaces, is a periodic surface with identical two-dimensional arrays of elements arranged on a dielectric substrate, which is used to transmit in-band signals and reflect out-band electromagnetism incidence [6]. Based on the resistor-loaded frequency selective surface (FSS), absorbers can be tuned to achieve a broadband absorption between 1 and 12 GHz [2].…”

Perforated Medium Applied in Frequency Selective Surfaces and Curved Antenna Radome

“…After decades of research, the structure and performance of FSS have been improved in many aspects. The existing prefabricated mediums have many dielectric constant values to be used in a variety of FSS designs, which are mainly distributed in 2.2 to 10.2 [1][2][3][4][5][6][7]. The ultra-wideband properties of FSS are closely related to the periodic element structure, dielectric material property and FSS layer structure.…”

A compact FSS with dual passbands and wide stopband

“…When the incident electromagnetic wave frequency is at the resonant frequency of the aperture type or patch type unit, the FSS will exhibit significant bandpass or bandstop filter characteristics [1,2]. FSSs have widely been used in spatial filters, absorbers, antenna radomes, and electromagnetic compatibility in the microwave, millimeter-wave and taraherz ranges [3,4,5,6].…”