An analysis of a linear antenna system as a multiport nonlinear circuit

Abstract

Finding a clear and simple method which gives steady state response of a linear antenna system with nonlinear loads is very important in the research field of electromagnetic compatibility (EMC). This paper concerns the EMI problem of electrical equipment exposed to electromagnetic surroundings. The problem is reduced to calculating the steady state response of a nonlinearly loaded multiport electrical circuit with multitone sinusoidal excitation. Several studies using Volterra series and multi-dimensional Fourier transform pairs have been made, but the method is very complicated due to the theoretical difficulty and computational complexity, so it is not conclusive in practical use. In this paper we introduce a simpler and more efficient method based on the nonlinear steady state response method. A characteristic of our new method is that we can easily and effectively apply it to the above problems and can obtain results equivalent to those obtained with the Volterra method. © 1997 Scripta Technica, Inc. Electron Comm Jpn Pt 1, 80(6): 8–16, 1997