Wigner function based propagation of stochastic field emissions from planar electromagnetic sources

Gradoni, Gabriele and Arnault, Luk R. and Creagh, Stephen C. and Tanner, Gregor and Baharuddin, Mohd Hafiz and Smartt, Christopher and Thomas, David W.P. (2017) Wigner function based propagation of stochastic field emissions from planar electromagnetic sources. IEEE Transactions on Electromagnetic Compatibility . ISSN 0018-9375 (In Press)

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Abstract

Modelling the electromagnetic radiation from modern digital systems – acting effectively as extended, stochastic sources as part of a complex architecture – is a challenging task. We follow an approach here based on measuring and propagating field-field autocorrelation functions (ACFs) after suitable averaging. From the modelling side, we use the Wigner transform of the ACFs to describe random wave fields in terms of position and direction of propagation variables. An approximate propagator for the components of the radiated magnetic field is constructed for these ACFs based on a linear flow map. Field-field ACFs at aperture level are obtained from scanning measurements of complex sources. Distance and spatial resolution of the scanning plane is less than a wavelength from the source plane to capture the imprint of evanescent waves in the nearfield ACFs. Near-field scanning and efficient near-to-far field propagation is carried out and compared with measurements. Results of this study will be useful to assist far-field predictions, source reconstruction, and emission source microscopy.

Item Type: Article
Additional Information: (c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: Statistical Electromagnetics, Near-field Scan, Wigner Function, Correlation, Reverberation Chamber
Schools/Departments: University of Nottingham, UK > Faculty of Engineering
University of Nottingham, UK > Faculty of Science > School of Mathematical Sciences
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Depositing User: Eprints, Support
Date Deposited: 09 May 2017 12:48
Last Modified: 09 May 2017 12:54
URI: http://eprints.nottingham.ac.uk/id/eprint/42674

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