Measurement and Wigner function analysis of field-field correlation for complex PCBs in near field

Baharuddin, Mohd Hafiz; Nasser, Hayan; Smartt, Christopher; Thomas, D.W.P.; Gradoni, Gabriele; Creagh, Stephen C.; Tanner, Gregor

doi:10.1109/emceurope.2016.7739237

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…The measured correlation data described in [3] are suitable for validation of the statistical field propagation techniques. However, the analysis of real world systems provides significant challenges as we cannot necessarily obtain stationary emissions that need to be applied to (3) so as to predict their propagation.…”

Section: Measurement Process Of Nonstationary Emissions From a Cmentioning

confidence: 99%

“…Electromagnetic Interference (EMI) measurement may be carried out in the time-domain as well as in the frequencydomain [2]. Recently, approaches to characterize the stochastic field by performing time domain correlation measurements are described in [1], [3], [4].…”

Section: Introductionmentioning

confidence: 99%

“…This algorithm is used to propagate fieldfield correlation functions from the near-field scanning measurement. The field-field correlation function can be provided through measurement by one-probe measurements [7] and two-probe measurements [3], [8]. For the measurement of complex devices, it is more appropriate to do a two-probe measurement in the time domain because of the lack of phase/time reference.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Nonstationary Emissions for Efficient Characterization of Stochastic EM Fields

Baharuddin

Smartt

Maricar

et al. 2018

2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE)

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A statistical approach using field-field correlation functions which is obtained from two-probe time domain measurement is used to characterize the radiation from complex devices. The time-frequency analysis provided by the measurement data has shown that significant emissions may only occur for a few percent of the time and a piecewise stationary model of emissions may be most appropriate. In this paper, a sorting technique is applied to short time segments of the nonstationary time-domain data provided by the measurements. These short time segments are sorted into groups according to the characteristics of the emissions, i.e. different emission processes, with the assumption that the stochastic emissions is stationary within each group (process). The ensemble of time segments associated with each group may then be used to obtain the fieldfield correlations for each process. Results of the analysis give promising insights into how to characterize complex and time dependent systems.

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Section: Measurement Process Of Nonstationary Emissions From a Cmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Nonstationary Emissions for Efficient Characterization of Stochastic EM Fields

Baharuddin

Smartt

Maricar

et al. 2018

2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE)

Self Cite

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“…Furthermore, in the propagation of CFs calculated from NFS of noisy fields, the connection between CFs and phase-space distributions to extract explicit directional information from the measurement process can be exploited. Interestingly, the method is able to include the transport of evanescent wave CFs as a leading order approximation of phase-space diffusion [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

“…NFS for field correlations in stochastic EM fields requires at least two field probes and has been addressed in [34][35][36][37]. The method has been validated experimentally in the context of cavity-backed apertures [29], Arduino printed circuit boards (PCBs) [38,39], and equipment-level enclosures [30].…”

Section: Introductionmentioning

confidence: 99%

Stochastic electromagnetic field propagation— measurement and modelling

Gradoni

Russer

Baharuddin

et al. 2018

Phil. Trans. R. Soc. A.

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This paper reviews recent progress in the measurement and modelling of stochastic electromagnetic fields, focusing on propagation approaches based on Wigner functions and the method of moments technique. The respective propagation methods are exemplified by application to measurements of electromagnetic emissions from a stirred, cavity-backed aperture. We discuss early elements of statistical electromagnetics in Heaviside's papers, driven mainly by an analogy of electromagnetic wave propagation with heat transfer. These ideas include concepts of momentum and directionality in the realm of propagation through confined media with irregular boundaries. We then review and extend concepts using Wigner functions to propagate the statistical properties of electromagnetic fields. We discuss in particular how to include polarization in this formalism leading to a Wigner tensor formulation and a relation to an averaged Poynting vector.This article is part of the theme issue ‘Celebrating 125 years of Oliver Heaviside's ‘Electromagnetic Theory’’.

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Automatic Segmentation of Nonstationary EM Emission of Electronics Product

et al. 2022

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Characterizing complex and multi-functional devices is a very challenging task. One problem in statistical near field analysis on complex electronic products is the emergence of nonstationary electromagnetic (EM) signals. Such emergence will lead to an incorrect decision if the signal is used as an input to propagation analysis. The most appropriate approach to this problem seems to be one based on the segmentation of the nonstationary time series obtained from measurements into an ensemble of piecewise stationary signals. In this paper, we propose three approaches for automatic segmentation of nonstationary EM emission signals: short-time energy (STE), short-time zero-crossing rate (STZCR), and short-time kurtosis (STK). Test results show that STE is the best in terms of success in segmenting the nonstationary signals to achieve piecewise stationary time series and being less computationally intensive.

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Measurement and Wigner function analysis of field-field correlation for complex PCBs in near field

Cited by 9 publications

References 7 publications

Analysis of Nonstationary Emissions for Efficient Characterization of Stochastic EM Fields

Analysis of Nonstationary Emissions for Efficient Characterization of Stochastic EM Fields

Stochastic electromagnetic field propagation— measurement and modelling

Automatic Segmentation of Nonstationary EM Emission of Electronics Product

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