DocumentCode :
21367
Title :
Empirical Emission Eigenmodes of Printed Circuit Boards
Author :
Arnaut, L.R. ; Obiekezie, C.S. ; Thomas, David W. P.
Author_Institution :
George Green Inst. of Electromagn. Res., Univ. of Nottingham, Nottingham, UK
Volume :
56
Issue :
3
fYear :
2014
fDate :
Jun-14
Firstpage :
715
Lastpage :
725
Abstract :
It is shown that radiated emissions from circuits can be efficiently decomposed and represented using principal component analysis (PCA). A hierarchical set of orthonormal spatial eigenmodes and their associated amplitudes are extracted from data for an emitted field that is scanned and measured across a planar area and wide frequency band. This decomposition is applied to the magnetic tangential field intensity for emissions from an analog transmission-line based circuit. The inhomogeneity of the autocorrelation matrix driving the PCA algorithm is experimentally demonstrated. Eigenmodes, loadings, and scores of the principal components are calculated and interpreted physically. Across the selected frequency band, PCA achieves efficiency savings of one to two orders or magnitude for the representation of emitted radiation.
Keywords :
correlation methods; eigenvalues and eigenfunctions; magnetic fields; principal component analysis; printed circuit testing; printed circuits; PCA; autocorrelation matrix; empirical emission eigenmodes; magnetic tangential field intensity; orthonormal spatial eigenmodes; principal component analysis; printed circuit boards; radiated emissions; Correlation; Loading; Principal component analysis; Standards; Time-frequency analysis; Vectors; Diagnostics; magnetic field probe; orthogonal expansion; principal component analysis (PCA); radiated emissions;
fLanguage :
English
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9375
Type :
jour
DOI :
10.1109/TEMC.2013.2292548
Filename :
6681940
Link To Document :
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