Frequency selective surface on low emissivity windows as a means of improving telecommunication signal transmission: A review

Yunos, Luqman; Jane, Marta Llusca; Murphy, Peter; Zuber, Kamil

doi:10.1016/j.jobe.2023.106416

Cited by 6 publications

(3 citation statements)

References 64 publications

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“…The artificial electromagnetic metasurface has gained widespread attention and applications due to its low cost and efficient control of electromagnetic wavefronts. The functionalities of electromagnetic metasurfaces include wavefront control with reflection and transmission capabilities, frequency-selective surfaces that modulate amplitude, and electromagnetic perfect absorbers that completely absorb incident waves [1][2][3][4]. A frequencyselective surface (FSS) is a two-dimensional periodically arranged array structure that exhibits different responses to electromagnetic waves of varying frequencies, polarizations, and incident angles.…”

Section: Introductionmentioning

confidence: 99%

A compact frequency-selective absorber with optical transparency

Deng,

Li,

Wang

et al. 2024

Mater. Res. Express

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This article proposes a new method for designing an optical transparent frequency-selective surface absorber using indium tin oxide (ITO) conductive film with different sheet resistances. This novel optical transparent frequency-selective absorber exhibits excellent optical transparency, ensuring a visible light transmittance exceeding 76%. Simultaneously, it exhibits broadband absorption characteristics covering the entire X-Ku band, with an absorption rate exceeding 90%. Due to the simplicity of the design, the overall structure is easily processable, and the desired product can be rapidly fabricated using laser etching equipment without adding any lumped elements in the design. Simulation and experimental results indicate that the S11-10dB frequency range of the frequency-selective absorber is 7.7-18.4 GHz, with a transmission frequency range below -3dB between 26.7-29.4 GHz. The findings suggest that this structure holds potential applications in microwave stealth design requiring optical transparency and high-throughput satellite communication scenarios.

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Section: Introductionmentioning

confidence: 99%

A compact frequency-selective absorber with optical transparency

Deng,

Li,

Wang

et al. 2024

Mater. Res. Express

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“…These repeaters capture signals from the base station through antennas and then redistribute these signals indoors. However, repeaters can only amplify specific frequencies, so they need replacement when communication standards change, leading to significant cost increases [5], [26]. Therefore, Frequency Selective Surfaces (FSS) emerge as an excellent solution.…”

Section: Introductionmentioning

confidence: 99%

Methods to improve 5G signal transmittance in modern buildings

Xu,

Feng,

et al. 2024

Preprint

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Modern buildings increasingly use low-emissivity (low-e) energy-efficient glass to achieve thermal insulation and reduce energy consumption. However, the low-e coating in energy-efficient glass also leads to high attenuation of wireless signals in the microwave frequency range (-25dB to -30dB), severely impacting the use of indoor wireless communication devices. In this paper, we investigate the use of Frequency Selective Surfaces (FSS) to address the indoor high attenuation issue of wireless signals. Through the transmission matrix method, we calculate the transmittance and reflectance coefficients of energy-efficient glass to optimize the unit structure of FSS, achieving enhanced indoor propagation of 5G high-frequency signals with dual polarization, wide-angle, and high transparency. The performance of FSS is verified through simulation and experimental validation. Without affecting the thermal insulation properties of energy-efficient glass, the signal attenuation in the sub-6G frequency range is reduced by 20-30dB, significantly improving the communication quality of 5G signals in modern building interiors.

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“…Few studies have been performed in China, which limits the popularization in China, which has huge cooling demands. For Low-E windows, current studies [23,24] have focused on the heat transfer of the window itself. The influence of the thermal capacity of the indoor environment on the window's performance and the overall relationships among cooing roofs, walls, and windows are not clear.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Energy-Saving Potential of Buildings with Radiative Roofs and Low-E Windows in China

Jia,

Li,

Yang

et al. 2023

Sustainability

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This study develops a model for buildings with a cooling roof, walls, and low-emissivity (Low-E) windows. This model is verified through experimental analysis. The cooling demands of standard buildings and cooling buildings are compared, and the energy-saving potentials of cooling buildings are analysed. It is found that compared to standard buildings, cooling buildings exhibit superior cooling performances attributable to the application of cooling materials. Considering Hong Kong’s weather data, the indoor temperature of cooling buildings can be sub-ambient. The cooling demands of cooling buildings are decreased from 75 W/m2 to 30 W/m2, indicating a 60% energy-saving potential. The nationwide cooling demand for a standard building across China is approximately 95.7 W/m2, whereas the nationwide summer average cooling demand for cooling buildings is 52.7 W/m2. Moreover, the cooling performance of a cooling roof is adversely affected by hot and humid weather conditions, resulting in lower temperature drops in southern regions compared to northern regions. However, the nationwide temperature drop across China can still be 1.6 °C, demonstrating promising cooling potentials. For the Low-E windows, the temperature can also be sub-ambient, with a nationwide average temperature drop of 1.7 °C. Therefore, the use of Low-E windows across China can also significantly contribute to energy savings for indoor cooling. Overall, the results of this study show that cooling buildings have high energy-saving potential under various climates. The proposed model can provide a reliable tool to facilitate relevant cooling evaluation by stakeholders, thereby benefiting the popularization of this technology.

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Frequency selective surface on low emissivity windows as a means of improving telecommunication signal transmission: A review

Cited by 6 publications

References 64 publications

A compact frequency-selective absorber with optical transparency

A compact frequency-selective absorber with optical transparency

Methods to improve 5G signal transmittance in modern buildings

Investigation of the Energy-Saving Potential of Buildings with Radiative Roofs and Low-E Windows in China

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