Articles | Volume 15
21 Sep 2017
 | 21 Sep 2017

Equivalent circuit simulation of HPEM-induced transient responses at nonlinear loads

Miroslav Kotzev, Xiaotang Bi, Matthias Kreitlow, and Frank Gronwald

Abstract. In this paper the equivalent circuit modeling of a nonlinearly loaded loop antenna and its transient responses to HPEM field excitations are investigated. For the circuit modeling the general strategy to characterize the nonlinearly loaded antenna by a linear and a nonlinear circuit part is pursued. The linear circuit part can be determined by standard methods of antenna theory and numerical field computation. The modeling of the nonlinear circuit part requires realistic circuit models of the nonlinear loads that are given by Schottky diodes. Combining both parts, appropriate circuit models are obtained and analyzed by means of a standard SPICE circuit simulator. It is the main result that in this way full-wave simulation results can be reproduced. Furthermore it is clearly seen that the equivalent circuit modeling offers considerable advantages with respect to computation speed and also leads to improved physical insights regarding the coupling between HPEM field excitation and nonlinearly loaded loop antenna.

Short summary
In this article the modeling of electromagnetic field coupling to nonlinear devices is studied. This is of benefit in the context of Electromagnetic Compatibility where the interaction between sensitive electronics within complex systems and electromagnetic interference is investigated.