Measurement‐based omnidirectional millimetre‐wave and sub‐THz propagation analysis in a large cubicle office environment

• Published in: IET microwaves, antennas & propagation antennas & propagation, 2023-05, Vol.17 (6), p.443-453
• Main Authors: Lee, Juyul, Park, Jae‐Joon, Kim, Kyung‐Won, Kwon, Heon Kook, Kim, Myung‐Don
• Format: Article
• Language: English
• Subjects: millimetre wave propagation; radiowave propagation; submillimetre wave propagation
• ISSN: 1751-8725; 1751-8733
• DOI: 10.1049/mia2.12363

For 5G beyond and/or 6G mobile services, a new spectrum at frequencies above 100 GHz has received great attention lately. To characterise the similarities and the differences between frequencies below 100 GHz and above 100 GHz, this paper provides analyses of multi‐frequency propagation characteristics based on wideband measurements at 28, 38, 71, 82, and 159 GHz, with an emphasis on the sub‐THz (i.e. the 159 GHz) propagation characteristics. All the frequency measurements were conducted in the same cubicle office room environment by locating the transmitter and the receiver at the same positions. The measurement results show that the path loss and the shadow fading characteristics do not exhibit significant differences depending on the frequency range from 28 to 159 GHz. However, the delay spread shows a generally decreasing trend as the frequency increases. Additionally, angular domain analyses were conducted with the 159 GHz measurements. This figure illustrates the free space loss‐compensated path loss map for the 28, 38, 71, 82, and 159 GHz measurements. The losses are in general similar among the frequency bands. When the Tx is located at the centre, the power coverage looks better since the power variation (to the worst point) is smaller.