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EMF Study
(Database last updated on Jun 1, 2020)

ID Number 729
Study Type Engineering & Physics
Model 400 MHz (AM-17 Hz Tetra) exposure to humans inside cars with hood mount antennas using FDTD numerical models

Field strength calculations inside a police car were performed assuming two handheld TETRA transmitters and a rooftop TETRA mobile phone all transmitting at the same time. The authors report that calculations indicated hot spots at or exceeding 100 V/m could be reached. This is in excess of ICNIRP MPE levels. However, this is not necessarily in excess of compliance SAR levels.

Findings Not Applicable to Bioeffects
Status Completed Without Publication
Principal Investigator British Telecom, UK
Funding Agency BT, UK

A number of significant flaws including a lack of modeling the two humans inside the car that would have absorbed much of the RF energy from their own handheld transmitter units that would not have been available for combined field strengh calculations. IN addition, the study assumes all transmitters were transmitting simultaneously and in phase, a highly improbable situation. Finally, the model itself was not completely realistic of a real life scenario. Even if the 100 V/m field strengh level was achieved, it is very likely that SAR levels as defined by ICNIRP would still remain below compliance levels.