Nowadays Radar systems are becoming complex systems. Many radars are constituted by an array of elements, where a minimum of coordination among the elements functionality is need. The task to build a prototype in order to validate a radar design is an expensive one. On the other hand, there are many common features shared among different radar architectures. This dissertation describes the architecture of a simulator that is able to represent most of the radar systems designed according the basic principles of radars. The simulator is designed following a exible component based architecture and five quite different kind of radars are described and simulated using the presented architecture. Real scenarios are taken into account in the validation of the simulations.