SAR compliance assessment of PMR 446 and FRS walkie-talkies

Bioelectromagnetics
Günter VermeerenLuc Martens

Abstract

The vast amount of studies on radiofrequency dosimetry deal with exposure due to mobile devices and base station antennas for cellular communication systems. This study investigates compliance of walkie-talkies to exposure guidelines established by the International Commission on Non-Ionizing Radiation Protection and the Federal Communications Committee. The generic walkie-talkie consisted of a helical antenna and a ground plane and was derived by reverse engineering of a commercial walkie-talkie. Measured and simulated values of antenna characteristics and electromagnetic near fields of the generic walkie-talkie were within 2% and 8%, respectively. We also validated normalized electromagnetic near fields of the generic walkie-talkie against a commercial device and observed a very good agreement (deviation <6%). We showed that peak localized specific absorption rate (SAR) induced in the oval flat phantom by the generic walkie-talkie is in agreement with four commercial devices if input power of the generic walkie-talkie is rescaled based on magnetic near field. Finally, we found that SAR of commercial devices is within current SAR limits for general public exposure for a worst-case duty cycle of 100%, that is, about 3 times and...Continue Reading

References

Jan 2, 2004·Physics in Medicine and Biology·Peter DimbylowSimon Mann
May 14, 2010·Physics in Medicine and Biology·J F BakkerG C van Rhoon
Jan 18, 2014·Bioelectromagnetics·Stefan CecilMarkus Glanzer

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