Scattering of pulsed electromagnetic waves by metallic obstacles

The scattering of transient electromagnetic signals by conducting obstacles was examined in the time-space domain using integral equations to model the distribution of the scattered signals. The obstacles were treated as being perfectly conducting, continous, with a current induced on their surfaces. The diffracted field was expressed in terms of Maxwell's equation and superposition theory. Generalized forms were developed for the integral equations, which are applied to two and three dimensional problems and to the case of thin wires. Numerical solutions of the integral equations are defined and include the use of Lagrangian polynomials and solution by means of time increments. The technique is demonstrated by calculating the response of a very large antenna to a parasitic pulsed electromagnetic signal and to scattering by a wire grid.