Broadband Measurement of Absorption Cross-Section of the Human Body in a Reverberation Chamber

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We present broadband reverberation chamber
measurements of the absorption cross section (ACS) of the hu-
man body averaged over all directions of incidence and angles of
polarization. This frequency-dependent parameter characterizes
the interactions between the body and the enclosures of rever-
berant environments such as aircraft cabins, and is therefore
important for the determination of the overall Q-factor and
hence the field strength illuminating equipment inside such en-
closures. It also correlates directly with the electromagnetic expo-
sure of occupants of reverberant environments. The average
absorption cross section of nine subjects was measured at fre-
quencies over the range 1-8.5 GHz. For a 75 kg male the ACS
varied between 0.18 and 0.45 square meters over this range. ACS
also correlated with body surface area for the subjects tested.
The results agree well with computational electromagnetic simu-
lations, but are obtained much more rapidly. We have used the
obtained values of absorption cross section to estimate the effect
of passengers on the Q-factor of a typical airliner cabin.
Index Terms—reverberation chamber, absorption cross-
Original languageEnglish
Pages (from-to)1043-1050
Number of pages9
JournalIEEE Transactions on Electromagnetic Compatibility
Issue number6
Publication statusPublished - 20 Mar 2013

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  • reverberation chamber
  • absorption cross- section
  • aerospace biophysics
  • specific absorption rate

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