Development of a hybrid MOMTD/FDTD technique for EMC problems: analysis of the coupling between ESD transient fields and slotted enclosures
✍ Scribed by G. Cerri; R. De Leo; V. Mariani Primiani; P. Russo; G. Tribellini
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 192 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0894-3370
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✦ Synopsis
The penetration of the "eld radiated by an indirect ESD into a shielded enclosure through an aperture has been analysed by a new hybrid numerical technique. In fact, the combination of the marching on in time version of the Method of Moment (MoMTD) and the Finite-Di!erence Time-Domain (FDTD) method allows to study more e$ciently and accurately typical EMC problems.
In particular, the use of the equivalence principle with a proper set of "ctitious currents (accounting for the coupling) permits to divide the complex original problem into two simpler problems: the radiation of the source, analysed by MoMTD, and the "eld scattering outside and inside the slotted shield, studied by FDTD method.
The validation of the model is assessed by setting up an accurate measurement in a well controlled environment using a network analyser. It consists of a monopole on a ground plane, fed by a voltage pulse that radiates a perfectly conducting box with a small horizontal aperture, facing the antenna in its near "eld region. The numerical results are compared with those from experiment and show a good agreement.