Dynamic and static reflection of microwaves from buildings

This paper describes measurements of frequency spectrum and amplitude of 5 GHz signals reflected from large, generally flat, building faces. Two techniques were used, namely dynamic (i.e. fast moving transmitter source) and static, with ground-based equipment located near an aircraft runway. Although simple theoretical considerations had suggested that the reflection characteristics should be approximately specular, the results showed that there were both spectrum broadening and large rapid fluctuations of reflection amplitude over the specular zone, with significant scattering outside this region.