Time Domain Integral Equation methods for nonlinear systems

In this paper we review the application of Time Domain Integral Equation (TDIE) methods to the prediction of current flow and radiated fields in antenna and scatterer systems with nonlinear loads. Typical applications include the prediction of currents and voltages induced in printed circuit boards by external fields and the prediction of radar cross section (RCS) of wire antennas with nonlinear loads. The analysis of nonlinear circuits is a complex problem. Many different techniques have been developed, the most efficient of which isolate the nonlinearities at discrete system ports and combine linear analysis of the bulk system with local analysis at a small number of nonlinear ports.