PC Case as EMC Cavity

WIPL-D Software suite offers a remarkable variety of tools and features for efficient simulation of EMC. They are rigorously demonstrated by using an EM simulation of metallic PC case tower. The realistic model is easily built in WIPL-D Pro CAD (the tool offers solid modeling capabilities and built in quadrilateral mesher). The PC case dimensions are 45 x 40 x 18 cm.

The meshed model has large regular quads on flat surfaces without details and small quads around numerous details. This shows precisely captured geometry and challenging large-to-small scale details included. The first scenario is meant to illustrate the complexity of EM simulation in the cavity. Wire dipole is inside of the case and the result of interest is input impedance. Such result reveals resonance for each of the mode of the cavity. A more complex compatibility scenario involves placing two microstrip filters into PC case and observing the S-parameters.

All simulations are run on standard desktop, lasting under a minute for frequency, even for the most complex scenario. The simulation can be partially speeded up by using inexpensive GPU card.

Section: EMC

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