  In order to evaluate the performance of radar and communication systems in
future wireless networks, accurate propagation models are needed to predict
efficiently the received powers at each node, and draw correct conclusions. In
this paper, we present new radar propagation models based on the
electromagnetism theory. The target is modelled as a flat or curved square
plate to compute the scattered field and derive accurate radar cross section
modellings. With a flat square plate, the model makes the link between the
radar equation and the geometrical optics propagation model used in ray-tracing
applications. It is then applied to popular automotive scenarios within the
stochastic geometry framework to observe the impact of such modelling.
