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Susceptibility characterization of a cavity with an aperture by using slowly rotating EM fields: FDTD analysis and measurements

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6 Author(s)
Murano, K. ; Tokai Univ., Kanagawa, Japan ; Sanpei, T. ; Fengchao Xiao ; Chen Wang
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This paper describes the evaluation of the susceptibility of a cavity with an aperture using the finite-difference time-domain (FDTD) method and experimentally. To reduce the computing time, the FDTD method is used for the radiation from the cavity and the susceptibility is obtained by using the reciprocity theorem. The cavity used here is modeled after a full-tower desktop enclosure with a 3.5-in bay. The susceptibility characteristics are evaluated by measuring outputs of a monopole antenna and transmission lines installed in the cavity. The susceptibility characteristics, using a three-dimensional (3-D) map, are studied from the computed and the measured results by applying slowly rotating electromagnetic fields to the cavity on a turntable. Measured and modeled results are in good agreement, indicating the merits of the proposed approach for susceptibility/immunity evaluation. Moreover, some discussions are made to check the susceptibility mechanism.

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:46 ,  Issue: 2 )