This demonstration models and analysis the near fields from a wire inside a metallic box with an aperture. Model available from: "EMI From Cavity Modes of Shielding Enclosures - FDTD Modeling and Measurements", M Li, J Nuebel, J.L. Drewniak, R.E. DuBroff, T.H. Hubing, T.P. van Doren, IEEE Trans. EMC, Vol. 42, No.1, February 2000