Electromagnetic Interference through Vent Array on Computer Enclosure

In this paper, the finite-difference time-domain (FDTD) method is used to study electromagnetic interference through vent array on computer enclosure. Ultra-wide Bandwidth (UWB) is used as the source, and both time-domain electromagnetic waves and field distribution in the enclosure are monitored. It can be seen that the coupled electric field in both three directions are large. From the field distribution, it is clear that the coupled electric field near the vent array is tremendous. Thus it can be concluded that the coupled electromagnetic interference (EMI) into the enclosure through vent array is quite large.