Attenuation of Several Common Building Materials: Millimeter-Wave Frequency Bands 28, 73, and 91 GHz

Shielding Effectiveness Measurements of Drywall Panel Coated with Biochar Layers

“…The attenuation of common building materials have been investigated for low frequency [2] and more recently at millimetre waves [38][39][40][41].…”

Corona and polio viruses are sensitive to short pulses of W-band gyrotron radiation

“…95 GHz is a good candidate for inactivation of viruses including coronaviruses on various surfaces due to the low penetration depth of 95 GHz in materials (Hosseini et al 2021 ) that can prevent damaging of the environment, and the ability to focus it to much better extent than microwaves. In addition, in low enough power density, 95 GHz is much less dangerous for humans then other means of decontamination such as UV irradiation and ethylene oxide (Karipidis et al 2021 ), and can even be useful for cancer treatment to irradiate malignant tumors (Miyoshi et al 2016 ).…”

Wireless Friendliness Evaluation and Optimization for Sandwich Building Materials as Reflectors

“…Specifically, the EM waves emitted from the transmitter often experience complicated reflection processes, e.g., onebounce reflection, with the intersecting physical objects before arriving at the receiver. The received signal power loss caused by reflections is jointly determined by the polarisation and the incident angle of the EM waves as well as the intrinsic EM and physical properties, e.g., the relative permittivity and thickness, of the building materials [20], [22], [23]. It is worth noting that a tiny variation in the relative permittivity and thickness of a building material will bring considerable changes in its reflection characteristics, and thus in the indoor wireless performance [12], [13].…”