Analysis and Characterization of Finite-size Curved Frequency Selective Surfaces

Abstract

Frequency Selective Surfaces (FSSs) are spatial filters that are largely employed in radomes for radars and antennas where high performance is necessary. FSS can be categorised in terms of their frequency behaviour. Band-pass FSS structures are able to let the electromagnetic wave pass in certain frequency ranges and shield others, which are especially suitable for out-of-band stealth of radomes. The properties of frequency selectiveness of these screens are used at microwave and infrared wavelengths. By tuning the electrical size and geometry of the unit-cell (patch or aperture) different frequency behaviours of the structure are generated. Although their analysis and simulation is significantly simplified with the approximation of infinite and planar array, in some real applications FSS are required to be conformal to limited non-planar structures. The literature on the problem of characterizing finite-size and curved FSS has been sparse and more focused on the single application rather than on a unified approach. In the aim of synthesizing valuable techniques, this paper reviews significant research results on truncated and curved FSS which were presented in the dedicated literature.

Equivalent circuit model of an ultra‐wideband frequency selective surface composite absorbing material

“…The numerical technique for analysing the FSS and relational CAM includes: finite element method (FEM), method of moments (MOM), finite difference time domain (FDTD), and equivalent circuit method (ECM) [5–8]. The full‐wave analysis method can provide accurate S‐parameter, electric field distribution, and current distribution, but it consumes more calculation cost.…”

Frequency Behavior of Conformal Wire Structures

“…FREQUENCY Selective Surfaces (FSS) have been studied for the last five decades [1,2,3]. Today there are many forms of FSS, due to increasingly stringent performance requirements of recent applications and to the significant improvements in analysis [4].…”

Numerical Investigation about Frequency Behaviour of Conformal FSS

“…They have evolved from simple canonical forms to the complex geometries known today [3]. Moreover, since FSSs are a part of the broad family of artificial materials [4], new research efforts have been dedicated to this topic.…”