<p class="Abstract">Electromagnetic compatibility (EMC) is getting
more and more interest with the ever-increasing adoption of electronic
devices. EMC must be planned, calculated, simulated, and measured; this is
necessary to ensure that the device can work in the environment of other
devices and does not disturb other devices through undesired interference.
In complex devices, simulation methods due to the large number of elements
and complicated operations can be extremely costly and time consuming. We
should consider how is it possible to reduce these costs, for example with
simplifying our simulation terminology. This paper explains a general theory
about using pre-measured EMC properties in simulation to predict how a
complex system (containing many devices) will work. This theory is about how
different radiated electromagnetic waves affect other devices. EMC standards
have been developed to test and limit unintentional coupling to and from
electronic devices (interference), but not developed to deal with more
devices crowded in a smaller environment. If we handle the different devices
as antennas, in the simulation environment we must not deal with their
internal structure and operation (unless we need information of their
internal structure). In this way, simulation time can be drastically
reduced.</p>