A time-domain integral-equation based hybrid simulator for EMI analysis of twisted cables on complex platforms

A time-domain integral equation (TDIE)-based simulator for performing electromagnetic interference (EMI) analysis involving twisted cables located on complex platforms is presented. Similar to its predecessors this hybrid simulator computes external fields on the platforms, guided fields along the transmission lines (TLs), and voltages and currents on TL loads, using a time-domain adaptive integral (TD-AIM) accelerated TDIE-based field, an FFT-accelerated TDIE-based TL, and a modified nodal analysis (MNA)-based circuit solver, respectively. Unlike its predecessors, the TL-component of the proposed simulator represents twisted cables using the model of (see C.R. Paul et al., IEEE Trans. Electromagn. Compat., vol.21, no.2, p.92-114, May 1979) and thus allows their EMI analysis together with the platform (such as cars and aircraft) they are located on. The proposed simulator models twisted cables as cascaded uniform TLs that represent twisted sections and the twists are assumed to happen abruptly at TL connections.