Experimental and theoretical investigation of the effects of building scatter on site shielding

The authors describe measurements of scattered microwave signals from a number of buildings made at 11.2 GHz. The scattering patterns observed at distances of a few hundred metres from the buildings were both dimension and distance dependent in nature. Conventional physical-optics considerations of far and near fields do not adequately account for these situations. The authors´ computer analysis was based on Kirchoff method with a more precise physical-optics consideration. The analysis was extended to consider the effects of building surface conditions