Reduction of Unknowns Over Electrically Large Scatterers


Calculation of monostatic scattering from electrically large metallic objects\aircrafts is often a subject of interest of scientific, military, or engineering working groups. Simulations of large, pure metallic scatterers still require significant attention as airplanes of the 4th generation are still operational and objects like, helicopters, missiles, and metallic spheres are used for calibrations or verification of the results.

This application note deals with the calculation of monostatic RCS of the metallic aircrafts at 2.00 GHz. The aim is to demonstrate highly efficient utilization of WIPL-D software for RCS calculation with a special attention given to a method of reduction of a number of unknowns. The reduction is performed by decreasing Reference frequency to 87.5% of the initial value resulting in a decreased number of unknowns and consequently significantly reduced simulation time. The high accuracy is preserved as the calculated RCS is almost unaffected by the reduction i.e., is in a good agreement with the results obtained using a higher number of unknowns.

WIPL-D Pro CAD, a full wave 3D electromagnetic Method-of-Moments (MoM) based software on an affordable desktop PC empowered with GPU cards has been used for the simulations.



For full version of the document, please check the following pdf.​