Scattering of ultrashort electromagnetic pulses by nonlinearly reflecting targets

Abstract

Nonlinear radiolocation is very promising for future remote sensing systems and it has been proposed for sensible determination and recognition of objects, including elements with different nonlinear electromagnetic characteristics. It is based on the fact that generation of higher harmonics occurs under scattering of electromagnetic waves by nonlinearly loaded conducting targets. Investigating re-reflected harmonics, one can determine a nonlinear object, and also obtain additional information. The paper investigates numerically the scattering of ultrashort electromagnetic pulses by the following models of nonlinear scatterers: nonlinearly loaded vibrator; two-dimensional plate. The calculations give the possibility of determining optimal values of electromagnetic probing pulse duration needed to obtain the maximal useful reflected signal.