Development of thin wire models in TLM

Numerical EMC models must cope with wide frequency ranges and complex structures. These requirements make differential time domain techniques such as transmission-line modeling (TLM) attractive. However, the structures of interest often contain elements with disparate dimensions. This can lead to enormous computing requirements, which can only be controlled by exploiting special models for features such as thin wires and slots. The performance of TLM thin wire modeling techniques, including a new multiconductor formalism, has been assessed by comparing predictions with theory, measurements and alternative numerical techniques. It is concluded that the performance of TLM models are comparable with the method of moments (MoM), and provide reasonable correlation with measurements.