Wide-Incidence Angle and Polarisation Insensitive Transparent Metasurface for 5G Outdoor to Indoor Coverage Enhancement

Danesh, Shadi; Bagheri, Amirmasood; Khalily, Mohsen

doi:10.1109/ap-s/usnc-ursi47032.2022.9886313

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Therefore, polarization-and incident-angle-insensitive FSSs along with miniaturization characteristics have evinced significant research attention in recent years. Besides, extensive research is ongoing to miniaturize the FSS profile and improve the frequency response with broader bandwidth at higher incidence angles which are also capable of supporting, filtering, or converting different EM wave polarization [16][17][18][19][20] . It must be noted that the single layered FSSs though they are easy to fabricate and implement, however they are inefficient 21 both in terms of amplitude and phase response over frequency.…”

Section: Introductionmentioning

confidence: 99%

Enhancing 5G Propagation into Vehicles and Buildings using Optically Transparent and Polarisation Insensitive Metasurfaces over Wide-Incidence Angles

Bagheri

Danesh

Wang

et al. 2023

Preprint

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This article presents two transmissive metasurfaces coated on a glassy window to enhance the 5G outdoor to indoor (O2I) coverage inside vehicles and buildings. Two different wide-incident angle, and polarization insensitive unit cells are proposed for both single-glazing and double glazing glasses and have been arranged in a periodic structure to construct the transmission surfaces. Both metasurfaces are optically transparent as Indium Tin Oxide (ITO) is used as a conductive part of each unit cell. The proposed transmission surfaces empower the indoor coverage of 5G signals at 3.5 GHz band for wide range of incident angels. Although multi-layer structures are generally more sensitive to angle of incidence, however, both proposed two layered transmissive surfaces offer wide angular stability up to 65 and 75 degrees for double-and single-glazed glass accordingly. In order to achieve wide stable angular response, evolutionary optimization techniques have been used to optimise the proposed unit-cells. Both designs support high transmission coefficient over the operating frequency for wide incident angles which are higher than reported structures in the literature review. The fabricated prototypes have been evaluated experimentally and from measured results, it appears that both metasurfaces offer significant potential to improve propagation into buildings and vehicles.

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Section: Introductionmentioning

confidence: 99%

Enhancing 5G Propagation into Vehicles and Buildings using Optically Transparent and Polarisation Insensitive Metasurfaces over Wide-Incidence Angles

Bagheri

Danesh

Wang

et al. 2023

Preprint

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Enhancing 5G propagation into vehicles and buildings using optically transparent and polarisation insensitive metasurfaces over wide-incidence angles

Bagheri,

Danesh,

Wang

et al. 2024

Sci Rep

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This article introduces two transmissive metasurfaces applied to normal windows, aiming to improve the 5G outdoor-to-indoor (O2I) coverage. These windows can be utilized in various settings, such as vehicles or buildings. The proposed unit cells, designed to be wide-incident angle and polarization insensitive, are implemented in both single-glazing and double-glazing glasses, arranged in a periodic structure to form the transmission surfaces. Both metasurfaces maintain optical transparency by incorporating Indium Tin Oxide (ITO) as the conductive element in each unit cell. These engineered transmission surfaces enhance the 5G signal indoor coverage at the 3.5 GHz band across a broad range of incident angles. While multi-layer structures typically exhibit heightened sensitivity to the angle of incidence, the proposed two-layered transmissive surfaces demonstrate substantial angular stability, reaching up to 65 and 75 degrees for double- and single-glazed glass, respectively. To achieve this wide and stable angular response, evolutionary optimization techniques were employed to fine-tune the proposed unit cells. Both designs exhibit a high transmission coefficient across the operating frequency for a variety of incident angles, surpassing those reported in the existing literature. Experimental evaluations of the fabricated prototypes indicate that both metasurfaces hold significant potential for enhancing signal propagation into buildings and vehicles.

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Analysis of Optical and Microwave Transmission by Linewidth Variation of Metal Mesh for FSS in GPTS

Shin,

Jung

2024

IEEE Microw. Wireless Tech. Lett.

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Wide-Incidence Angle and Polarisation Insensitive Transparent Metasurface for 5G Outdoor to Indoor Coverage Enhancement

Cited by 3 publications

References 2 publications

Enhancing 5G Propagation into Vehicles and Buildings using Optically Transparent and Polarisation Insensitive Metasurfaces over Wide-Incidence Angles

Enhancing 5G Propagation into Vehicles and Buildings using Optically Transparent and Polarisation Insensitive Metasurfaces over Wide-Incidence Angles

Enhancing 5G propagation into vehicles and buildings using optically transparent and polarisation insensitive metasurfaces over wide-incidence angles

Analysis of Optical and Microwave Transmission by Linewidth Variation of Metal Mesh for FSS in GPTS

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