Millimeter-wave Scattering from Building Facade: A Simulation and Verification Study

This paper presents millimeter-wave scattering from a building facade predominantly composed of windows. These windows are integrated into the walls, forming dihedral structures that reflect waves toward the incident angle. The scattered field resulting from the building facade is simulated using the two-bounce Geometrical-Physics (GO) method. We analyze the channel in power loss and arrival angle along the receiver's trajectory path. It is observed that in the delay domain, the trajectory path due to a window appears as a line, and in the angular domain, it follows a hyperbolic curve. A comprehensive measurement campaign is conducted to verify the results in both the delay and angular domains. This measurement campaign takes place in a courtyard scenario, utilizing a multi-input-multioutput (MIMO) channel sounder operating within the frequency band centered at 28 GHz. Notably, the results obtained through simulation exhibit a commendable level of agreement with the measurement data.