The Physical Optics aperture radia- tion is decomposed into an inhomogeneous plane- wave spectrum, for which a sub-nyquist sampling is achieved, despite a 2-digits accuracy. Validation with a Hertzian dipole and observations are made for large planar surfaces. The Spectral Physical Optics (SPO) seems particularly well-suited for multiple in- teractions between large facets in complex scattering environnements.
Gueuning, Q., Craeye, C., & Oestges, C. (2015). Inhomogeneous plane-wave spectrum basedphysical optics. Proceedings International Conference on Electromagnetics in Advanced Applications. Published. International Conference on Electromagnetics in Advanced Applications, Torino. https://doi.org/10.1109/ICEAA.2015.7297361