The demand for EM modelling in the automotive industry is increasing as communication demands in the industry becomes more complex and varied. Modern cars have antennas for radio, TV, navigation (e.g. GPS), telecommunications (e.g. GSM), onboard communication (e.g. Bluetooth), wireless system communication (e.g. tyre pressure monitors), collision avoidance radars etc.

Installing electronics and antennas on vehicles is risky and can be very costly if no prior modelling is done. Although measurements are the most trusted method in design, this can be a costly exercise when the endeavour has to be repeated several times in, for example, determining the optimum position of for antenna.
Similarly, cable routing in a motor vehicle needs to be considered carefully to minimise possible EMC problems with respect to other electronics in the vehicle.

EMSS has done several projects involving the simulation, and comparison to measurements, on the following topics:

• Electrical fields inside the vehicle
• Antenna modeling (e.g. antenna integrated in the back window)
• Tyre pressure monitors
• Coupling of fields into cable harnesses