Novel microwave transparent low emissivity coating for energy-effcient glazing: towards 5G frequencies

Fleury, Jeremy and Burnier, Luc and Lanini, Matteo and Di Domenico, Mauro and Zimmermann, Erich and Genoud, Carine and Salvadé, Andrea and Schüler, Andreas (2019) Novel microwave transparent low emissivity coating for energy-effcient glazing: towards 5G frequencies. Journal of Physics: Conference Series.

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Abstract

Novel mobile communication technology such as 5G will provide a more effcient and reliable platform for the development of the Internet of Things. However, microwaves in the range of 5G frequencies are strongly attenuated by modern energy-effcient glazing found in most recent buildings. This paper presents major steps towards microwave transparent glazing which allows a flawless transmission of 5G frequencies while maintaining the thermal energy effciency of the window. Several double glazing windows with different properties were fabricated with a laser treatment and their effect on the signal attenuation in the frequency range between 0.7 and 3.5 GHz was measured. The results showed that the laser treated windows produced a transmission of the microwave as good as a non-coated window. In comparison, an energy-effcient window without laser treatment reduces the signal strength up to 300 times.

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