Experimental Investigation of Propagation Over the Forearm at 24 GHz

On-body propagation is experimentally investigated at 24 GHz using Vivaldi and Yagi antennas placed on a forearm phantom. The effect of antenna/body spacing on path loss is analyzed for normal and tangential polarizations. The results show that path loss varies significantly for tangential polarization when the antenna/body spacing changes. We also demonstrate that the two-ray propagation model is applicable to the human forearm, to identify locations with constructive and destructive interference between direct and reflected waves. This opens a possibility for channel enhancement.