A dual-band FSS based electromagnetic shield for 5G and 6G applications

Abstract

ABSTRACTThe present paper proposes a dual-band frequency selective surface for 5 G and 6 G shielding applications. The design evolves from a fractal circular patch etched from the metallic square patch to achieve wideband, angular stability, and polarisation insensitivity up to incident angles of 45°. The proposed FSS unit cell has a dimension of 0.2λ0 ×0.2λ0, where λ0 is the free space wavelength corresponding to the resonant frequency. The FSS shield provides dual stopbands centred at 3.5 GHz and 5.9 GHz with fractional bandwidths of 13.4% and 5.08%, respectively. A prototype was fabricated on an FR4 substrate to validate the design, which includes 6 × 6 elements with dimensions of 108.8 mm × 108.8 mm × 1.6 mm. Measurements have shown a consistent shielding effectiveness of 35 dB at the lower band and more than 27 dB at the upper band, which are in good agreement with simulation results. The compact size, simple geometry, and descent shielding effectiveness are the unique features of the proposed design which may be a good choice for 5 G and 6 G communications.KEYWORDS: Frequency selective surfaceelectromagnetic shielddual bandbandstop and microwave frequenciesDisclaimerAs a service to authors and researchers we are providing this version of an accepted manuscript (AM). Copyediting, typesetting, and review of the resulting proofs will be undertaken on this manuscript before final publication of the Version of Record (VoR). During production and pre-press, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal relate to these versions also.