Analysis of electromagnetic scattering by a rotating rotor with flat blades

Abstract

The problem of amplitude and frequency modulated waveforms of an electromagnetic wave due to the scattering by a slowly rotating rotor with metal plate(s) is investigated in this study. Equivalent current method (ECM) together with geometrical theory of diffraction (GTD) is used to analyze the modulated waveforms. The modulated waveforms depend on the orientation and dimension of the object, its rotation speed, and very strongly on the incident and scattering directions. Numerical results based on our ECM are presented and compared with those of Sikta's (1983) and physical optics (PO) solution.<>