Power-Angle Spectrum Characterization Based on Antenna Directivity Statistics in Wireless Multipath Channels Using Spherical Vector Waves

This paper introduces a novel method for characterizing the power-angle spectrum (PAS) and antenna directivity in wireless multipath channels using spherical vector wave (SVW) expansion. Based on measurements at 5.2 GHz in indoor-to-outdoor scenarios, we analyze dipole and quadrupole modes in both vertically and cross-polarized channels. We propose characterizing the direction-spread based on the corresponding antenna directivity. This offers a more detailed understanding of antenna performance influenced by spatial fading and propagation effects.