Future cellular systems will make use of millimeter-wave (mm-wave) frequency bands. Many users in these bands are located indoors, i.e., inside buildings, homes, and offices. The typical building material attenuations in these high-frequency ranges are of interest for link budget calculations. In this article, we report on a collaborative measurement campaign to find the attenuation of several typical building materials in three potential mm-wave bands (28, 73, and 91 GHz). Using directional antennas, we took multiple measurements at multiple locations using narrow-band and wideband signals and averaged out residual small-scale fading effects. The materials include clear glass, drywall (plasterboard), plywood, acoustic ceiling tile, and cinder blocks. The specific attenuations range from approximately 0.5 dB/cm for ceiling tile at 28 GHz to approximately 19 dB/cm for clear glass at 91 GHz.
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Hosseini, Nozhan; Khatun, Mahfuza; Guo, Changyu; Du, Karirui; Ozdemir, Ozgur; Matolak, David W.; . . . and Mehrpouyan, Hani. (2021). "Attenuation of Several Common Building Materials: Millimeter-Wave Frequency Bands 28, 73, and 91 GHz". IEEE Antennas and Propagation Magazine, 63(6), 40-50. https://doi.org/10.1109/MAP.2020.3043445