Premium
Development of a hybrid MOMTD/FDTD technique for EMC problems: analysis of the coupling between ESD transient fields and slotted enclosures
Author(s) -
Cerri G.,
De Leo R.,
Primiani V. Mariani,
Russo P.,
Tribellini G.
Publication year - 1999
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/(sici)1099-1204(199907/08)12:4<245::aid-jnm328>3.0.co;2-v
Subject(s) - finite difference time domain method , electromagnetic compatibility , shielded cable , electromagnetic pulse , electromagnetic shielding , aperture (computer memory) , method of moments (probability theory) , ground plane , physics , acoustics , optics , moment (physics) , electronic engineering , engineering , antenna (radio) , electrical engineering , mathematics , classical mechanics , statistics , estimator
The penetration of the field 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‐Difference Time‐Domain (FDTD) method allows to study more efficiently and accurately typical EMC problems. In particular, the use of the equivalence principle with a proper set of fictitious 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 field 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 field region. The numerical results are compared with those from experiment and show a good agreement. Copyright © 1999 John Wiley & Sons, Ltd.