A hybrid technique for EMI prediction and channel modeling inside an enclosed space

In this paper, modeling of electromagnetic field distribution inside an electrically large closed environment is presented by using a hybrid simulation technique, which combines a full-wave method and an asymptotic technique. In the hybrid scheme, the Method of Moments is used to model the transmitting/receiving antennas and their nearby objects. The equivalent sources obtained from the MoM solution will be provided as input to an adaptive ray tracing technique for computing the long distance coupling between a pair of transmitting and receiving antennas. Base on this model, the radio channel characteristics of a wireless network deployed in an enclosed space as well as the levels of EMI produced from the network infrastructure can be estimated and predicted. The simulation results of an in-cabin wireless system show the capability of the presented hybrid model.