The behaviour of radiofrequency waves propagating in open space differs from those propagating in enclosed spaces. If propagating rf waves have wavelengths that are half wavelength multiples of the openings of these orifices, confined or enclosed areas such as buildings where people live and work can operate as waveguides. Waves having a frequency higher than the cut-off frequency can propagate and create hot spots within under these conditions.
The measurement of maxima electric field intensities at 54 grid locations within an empty rectangular metallic cuboid of particular dimensions provided empirical support for the theory of rf wave guide propagation inside massive structures. These rf maxima intensities were recorded at varied angles of approach, AOA, of the incoming rf waves to the entrance of the confined space for varying frequencies representing modes TE10 to TE33. The Generalized Extreme Value (GEV) model was found to best represent these measured rf electric field intensities, with the statistics of extremes providing the best fit for the distribution.
The number of hot spots (maximum of maxima intensities) was identified, and a Poisson distribution model was used to quantify the likelihood of a human within the region being exposed to one or more of these hot spots.Author(S) Details
Ricardo J. Rodriguez
University of the Southern Caribbean, Trinidad, West Indies.
Winston G. Lewis
University of the West Indies, Trinidad, West Indies.
View Book:- https://stm.bookpi.org/NPER-V6/article/view/5506
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