Propagation Measurements Comparing Indoor and Outdoor Hotspot Coverage at 28, 58, and 143 GHz

In this paper, we compare radio propagation channel characteristics of the 28, 60, and 140 GHz bands in one indoor and one outdoor hotspot scenario. The paper concludes that the excess loss, i.e., the loss in addition to the free-space path loss, is very similar for 28, 58 and 143 GHz as long as the measurements are conducted in open areas or where only one or two reflections are needed to get coverage. In areas requiring multiple reflections or wall penetration to achieve coverage, the excess loss increases for the higher frequencies.