Characterization of Switchable Rectangular Ring FSS with Non Coupled Parallel Metallic Strips for Multi Band and Dual Polarized Applications Using WCIP Method

Abstract

In this paper, a rectangular metallic ring FSS (Frequency Selective Surfaces) with parallel metallic strips for multi band applications are characterized by the WCIP (Wave Concept Iterative Procedure) method. The proposed FSS structures are made of metallic elements that are simultaneously independent in the spatial domain and uncoupled in the spectral domain. Thus the FSS multiband behavior can be achieved only by a building process based on independent metallic elements in both domains. The resonant characteristics of the proposed FSS are determined. The structure shows three resonant frequencies when the incident wave is x-polarized and three resonant frequencies when the source is polarized in the orthogonal direction. A variation in the length of the strips and the rectangular ring allows a fine tuning in the FSS resonant frequencies to give raise to tuned bandwidths. The suppression of a resonant frequency can be insured either by the elimination of the responsible metallic strip or by the insertion of a PIN diode switch. Three FSS structures are manufactured and characterized. The FSS bandwidth can be enhanced in both perpendicular FSS exciting source directions by only varying the strips lengths and the ring dimensions to the corresponding resonant frequencies. A good agreement is obtained when the WCIP results are compared with the simulations of COMSOL Multiphysics software and experiment.

Design and Synthesis of an Ultra Wide Band FSS for mm-Wave Application via General Regression Neural Network and Multiobjective Bat Algorithm

“…The last few decades have been marked by a great interest in the use of Frequency Selective Surfaces (FSS), as spatial filters, for several microwave applications [2], [3], [5] - [9]. The FSS are typically two-dimensional periodic arrays, which act as spatial filters [15].…”

“…The electromagnetic (EM) wave control through surfaces or border layers is a subject of great interest for researches in the field of applied electromagnetism. At this scenario, the study of Frequency Selective Surfaces (FSS) is highlighted [2], [3], [5] - [9], due to their capacity to effectively control characteristics such as frequency response magnitude, polarization and wave propagation phase in specific frequency bands [10]. This justifies the development of new techniques for the analysis, project and modeling of novel FSS geometrical shapes for applications in different patterns of frequency spectrums and systems [11].…”

WCIP Method Applied To Modeling an L-Notched Rectangular Metallic Ring FSS for Multiband Applications and its Equivalent Structure

“…In this paper, we propose a structure having five resonant frequencies, three resonant when the FSS is x-polarized and two resonant when the FSS is y-polarized. To perform this investigation, the proposed FSS was simulated using the wave concept iterative procedure WCIP [16].…”