Near-Field Scanning and Propagation of Correlated Low-Frequency Radiated Emissions

Gabriele Gradoni, Deepthee Madenoor Ramapriya, Stephen C. Creagh, Gregor Tanner, Mohd Hafiz Baharuddin, Hayan Nasser, Christopher Smartt, David W.P. Thomas

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Electromagnetic radiation from complex printed circuit boards can occur over a broad frequency bandwidth, ranging from hundreds of megahertz to tens of gigahertz. This is becoming a critical issue for assessment of EMC and interoperability as electronic components become more and more integrated. We use emissions from an enclosure with a single-slot aperture and equipped with operating electronics to exemplify and model such sources. Spatial correlation functions obtained from two-probe measurements are used both to characterize the source and to propagate the emissions. We examine emissions in the submicrowave frequency range, where evanescent decay dominates the measured correlation function at the distances measured. We find that an approximate, diffusion-like propagator describes the measured emissions well. A phase-space approach based on Wigner functions is exploited to develop this approximation and to provide enhanced understanding of the emissions.

Original languageEnglish
JournalIEEE Transactions on Electromagnetic Compatibility
DOIs
Publication statusAccepted/In press - 19 Dec 2017

Fingerprint

near fields
low frequencies
Scanning
scanning
propagation
Electromagnetic compatibility
Enclosures
Interoperability
Printed circuit boards
Electromagnetic waves
Electronic equipment
interoperability
Bandwidth
printed circuits
circuit boards
enclosure
electronics
slots
electromagnetic radiation
apertures

Keywords

  • Apertures
  • Correlation
  • Correlation
  • Fourier transforms
  • Frequency measurement
  • near-field scan
  • Noise measurement
  • Probes
  • radiated emissions
  • statistical electromagnetics
  • Stochastic processes
  • Wigner function

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Near-Field Scanning and Propagation of Correlated Low-Frequency Radiated Emissions. / Gradoni, Gabriele; Ramapriya, Deepthee Madenoor; Creagh, Stephen C.; Tanner, Gregor; Baharuddin, Mohd Hafiz; Nasser, Hayan; Smartt, Christopher; Thomas, David W.P.

In: IEEE Transactions on Electromagnetic Compatibility, 19.12.2017.

Research output: Contribution to journalArticle

Gradoni, Gabriele ; Ramapriya, Deepthee Madenoor ; Creagh, Stephen C. ; Tanner, Gregor ; Baharuddin, Mohd Hafiz ; Nasser, Hayan ; Smartt, Christopher ; Thomas, David W.P. / Near-Field Scanning and Propagation of Correlated Low-Frequency Radiated Emissions. In: IEEE Transactions on Electromagnetic Compatibility. 2017.
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