Disk: A Comparison of Electromagnetic Scattering Solutions and Its Use as a Calibration Standard for Bistatic RCS (Radar Cross Section) Measurements

摘要

This report compares three solutions for scattering from a perfectly conducting risk. It compares a closed form Physical Optics (PO) solution, a solution found by applying the RADC/BSRCRCS scattering prediction code, and an exact eigenfunction solution. The results are compared for various ka values and incidence angles for both horizontal and vertical polarizations. In addition, this report determined the applicability of the disk as a calibration standard for bistatic radar cross section (RCS) measurements by examining the calibration curve. This curve is a plot of the specular return as a function of bistatic angle. This curve is computed for both horizontal and vertical polarizations at various ka values using the PO and eigenfunction solutions. Results show that PO agrees reasonably well with the PTD and eigenfunction solutions in certain cases. The agreement is particulary good for the calibration curve for a wide range of bistatic angles. (RH)