Design methodology to limit coupling between board tracks on PCB level in realtime

The paper describes a future trend of EMC simulation on PCB level. The coupling of multiconductor multilayered transmission lines in modern automotive control units is calculated in realtime during the layout process. Serving as an example a triplate structure with parallel planar microstrip lines is investigated. A forward function is developed to calculate the coupling factor between the microstrip lines. The data for all occurring configurations is stored in a lookup table. The table is used to solve the inverse electromagnetic problem. Forward and inverse functions are verified and already proven in the industrial application.