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 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.
Highlights
Along the decades, the increased demand for telecommunication systems services, due to the technological progress encouraged the development of new frequency selective surfaces having multiband applications and smaller sizes [1], [2]
In this paper, a rectangular metallic ring frequency selective surfaces (FSS) (Frequency Selective Surfaces) with parallel metallic strips for multi band applications are characterized by the WCIP (Wave Concept Iterative Procedure) method
To validate the implemented WCIP method results for no need to more improvement to accelerate convergence for the used grid and stopping iterative procedure in addition to mastering Comsol Multiphysics for planar FSS problems, the scattering parameters of the structure shown in figure 2 are obtained by the WCIP method
Summary
The increased demand for telecommunication systems services, due to the technological progress encouraged the development of new frequency selective surfaces having multiband applications and smaller sizes [1], [2]. Theses FSS structures suffers from being not under the total control of the users since changing one or many FSS metallic elements dimensions at a time leads to a non prior known frequency response unless a deep parametric study is done With these FSS it is not possible to build the desired frequency response in all the cases. To overcome the previous FSS drawbacks, in this paper the presented FSS structure is made of parallel non coupled metallic strips with one rectangular metallic ring acting as a multi-band and a dual polarized filter with three resonant frequencies for an x-polarized source and three resonant frequencies for a y-polarized source. The WCIP method (Wave Concept Iterative Procedure) gets its originality from its ease of implementation since it is based on two essential equations The former is defined in the spatial domain and it is a description of the interface using the boundary conditions. WICIP results are compared to results simulated by COMSOL Multiphysics 4.3v software package and experimental measurements and a good agreement is recorded
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