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Radio frequency electromagnetic fields in large conducting enclosures: effects of apertures and human bodies on propagation and field-statistics

Robinson, M.P., Clegg, J. and Marvin, A.C. (2006) Radio frequency electromagnetic fields in large conducting enclosures: effects of apertures and human bodies on propagation and field-statistics. IEEE Transactions on Electromagnetic Compatibility, 48 (2). pp. 304-310. ISSN 0018-9375

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Abstract

Radio frequency propagation in an electrically large resonant chamber (a screened room) was simulated by two models: a statistical combination of multiple resonant modes and a computational electromagnetic simulation [the transmission line matrix (TLM) method]. The purpose of this work was to investigate the effects of passengers and windows on electromagnetic fields (EMF) in aircraft and other vehicles. Comparison of the multimode models with measurements made in a screened room showed that as the electromagnetic losses increased, the transmission between two internal antennas was reduced, and there were fewer turning points in its frequency response. The autocorrelation of this frequency response provided a useful estimate of the composite Q-factor of the resonances and showed that the Q of the chamber was reduced from a value of the order of 10 000 when emptied to 1000 when windows were added and when filled with people to 100. The TLM simulation provided further useful information about the statistical variation of electric field strength with position.

Item Type: Article
Academic Units: The University of York > Electronics (York)
Depositing User: York RAE Import
Date Deposited: 15 May 2009 13:42
Last Modified: 15 May 2009 13:42
Published Version: http://dx.doi.org/10.1109/TEMC.2006.873856
Status: Published
Publisher: IEEE Institute of Electrical and Electronics
Identification Number: 10.1109/TEMC.2006.873856
URI: http://eprints.whiterose.ac.uk/id/eprint/6351

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