ANSYS HFSS Physical Optics Solver
HFSS offers a physical optics (PO) solver as part of the IE solver. In PO, a radiation source is used to illuminate the geometry, thus inducing PO currents that then reradiate. This asymptotic method is extremely useful when solving very large electromagnetic radiation and scattering problems. Applications include large reflector antenna simulations as well as radar cross section (RCS) of large objects such as aircraft and ships. This capability allows you to illuminate any large structure by an incident plane wave excitation or use a linked HFSS simulation as a source.
Antenna pattern of antenna mounted on International Space Station using physical optics method