The MTL method and concept of shading to model automotive wiring having wide and multiple ground planes

Abstract

In automotive wiring application EM problems are often characterized by a wide span of ratio between geometrical size and signals wavelength. This is a critical situation for conventional numerical simulation tools. This paper proposes an efficient technique to overcome the difficulty of the wiring simulation on large vehicle chassis by reducing them. Using the MTL method and based on the electromagnetic shade of a cable to a ground plane, the area where currents distribution is concentrated is identified. Several geometrical configurations are studied with one or multiple grounds planes to evaluate the advantages in term of simulation costs (time and memory).

Electromagnetic Modeling of Wire-Ground Structures by using a MTL Based Approach

“…The uncoupled second order MTL equations obtained from (9a) by differentiation with respect to z dimension are given by (10).…”

“…Its contribution on coupling effects will be expressed by the level and the spreading of its current distribution. As a part of this work, an easily reduced model can be extracted from MTL modeling by using the concept of shading [10], i.e. intense or dominant coupling parts are kept while the remaining ones are eliminated.…”