Wideband scattering of an airfoil with plasma coating

Using shift operator method, the recursive relation for D/spl I.oarr/ and E/spl I.oarr/ available for FDTD computation of plasma coating is obtained. We apply FDTD and this relation to calculate wideband scattering for an airfoil with plasma coating. To verify the scheme we compute wideband RCS of a circular cylinder with plasma coating, which is in good agreement with the one in literature The computation of airfoil with plasma coating demonstrates the significant reduction of RCS in wideband from 2 - 20 GHz. Based on the results obtained we conjecture that larger electron density and higher electron collision frequency for plasma coating are preferable for the purpose of RCS reduction.