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Induced current measurements in whole body exposure condition to radio frequency electric fields
Author(s) -
Wilén Jonna,
Mild Kjell Hansson,
Paulsson LarsErik,
Anger Gert
Publication year - 2001
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.84
Subject(s) - current (fluid) , electric field , acoustics , electrical engineering , optics , extremely low frequency , stripline , radio frequency , capacitive sensing , physics , environmental science , engineering , magnetic field , quantum mechanics
The current induced in a human exposed to radio frequency electric fields has been studied by the use of a stripline, in which whole body exposure to vertical electric fields (3–27 MHz) can be produced. We have examined two different techniques to measure the induced current; parallel plate meters and current probes. When the subject has good connection to the ground, the choice of measurement technique is not crucial, since there are only minor differences in readings between the instruments. But when the subject is wearing shoes and/or standing on a wooden plate, the difference between the instruments increases considerably. The difference can mainly be explained by the capacitive coupling between the parallel plate meters and the ground; therefore, the current probes are preferred when the subject does not have perfect contact with the ground. Since the International Commission on Non‐Ionizing Radiation Protection guidelines demand measurements of induced current in humans exposed to radio frequency fields in the range of 10–110 MHz, the importance of finding an appropriate measurement procedure becomes apparent. Bioelectromagnetics 22:560–567, 2001. © 2001 Wiley‐Liss, Inc.