Abstract
A simple synthesis method for ultra-thin double-sided cross-dipole-based Frequency Selective Surfaces (FSS) is presented in this paper. The presented technique is used to design a flexible band-stop FSS for Electromagnetic Interference (EMI) shielding applications operating at 10 GHz. An Equivalent Circuit (EC) model in combination with closed-form expression is used to synthesize and validate the response of the proposed element. In addition, a parametric study of the proposed FSS aiming to optimize the bandwidth has been presented. The proposed FSS holds similar responses for TE and TM mode of polarization at normal incidence. Further, the conformal behavior of the proposed FSS in comparison with planar FSS is presented and evaluated. The proposed FSS is validated with the full-wave EM solver for simulation and a prototype is fabricated. The size of the proposed unit cell is 0.4λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> ×0.4λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> , where λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> is the free space wavelength at the desired the resonant frequency. In addition, the fractional bandwidth for TE and TM modes is 10.42% at normal incidence. The measured results of a proposed FSS are presented and validated in comparison with the simulations with good agreement.
Highlights
A new concept of periodic structures is used to meet the rapid development of communication technology in terms of high data rates and system capacity
This paper proposes a straightforward technique for synthesizing a flexible doublesided parallel cross-dipoles-based Frequency Selective Surfaces (FSS) for a particular frequency band and provides the required size for the doublesided parallel cross-dipoles topology
NUMERICAL RESULTS The synthesis steps described in Section II are followed to design a stop-band FSS having a resonant frequency at 10 GHz for an arbitrary value of quality factor Q = 7
Summary
A new concept of periodic structures is used to meet the rapid development of communication technology in terms of high data rates and system capacity. The analysis of FSS is essentially a method based on geometric parameters like the period of the unit cell (p), metal length (l), metal width, and the gap between the adjacent strips (g). In these techniques, the knowledge of the physical parameters is vital for accurate design. To find these parameters for given filtering properties, a few synthesis methods are presented in the literature, especially for double-sided parallel-cross-dipolesbased FSS.
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