Diffraction Measurements around a Building Corner at 10 GHz

ABSTRACT This paper presents the results and analysis of diffraction measurements around a building corner at 10 GHz. Radio channel measurement setup contains a 4-port vector network analyzer and two virtual antenna arrays. Angle of arrival analysis is carried out to distinguish the diffracted path from the other multipath components in the impulse response. Results are analyzed with respect to the Fresnel diffraction parameter and diffraction angle, and compared with the knife edge diffraction (KED) and absorbing screen diffraction losses, respectively. The absorbing screen approach is concluded to give reasonable fit for the measurements in the shadow region, but a poor fit near to the shadow boundary and in the illuminated region. The analysis of the corner diffraction shows that a building corner can be modeled by the KED-theory at 10 GHz.