Evaluation of the radiated field by a harness above a partial composite material chassis

This work is focused on the radiated field by a vehicle harness above a partial composite material chassis. Assuming that the field radiated by a harness is due to the common mode current, we model the vehicle harness by an equivalent single wire. After validating the surface impedance equivalent model of layered materials in the case of low conductive reinforced composite materials, we use it to evaluate the effects of the composite materials on the radiated field. The results obtained on the total radiated power with three different chassis configurations (steel, a partial carbon fiber reinforced epoxy chassis and a partial fiberglass reinforced epoxy chassis) are compared. Finally, knowing that the assembling of parts of the chassis is critical in terms of current conduction, the effect of the assembling technique in the case of the carbon fiber reinforced chassis is studied.