ID Number		1134
Study Type		Engineering & Physics
Model		900 MHz (GSM) exposure from a mobile phone operating at full power (2 watt peak pulse) and determination of ELF emission profile
Details		ELF electromagnetic fields produced by GSM Using a new method for modeling, the authors report the values are considerably less than those obtained with the previously-tested model. mobile phones (operating at full power - 2 watt peak pulse) due to current pulses in the battery were measured as well as calculated (using a geometrical model based on current measurements) and compared to ICNIRP and IEEE standards. Battery pulses are described by the authors to produce positive and negative pulses of 0.7 to 1.0 ms every 4.6 ms (0.2 kHz) - typically a rounded square wave or resistor-capacitor (RC)-filtered square wave creating a broadband spectrum from a few Hz to 40 kHz with a radius of the current circuit ~ 3 cm. For measurements, peak currents during the pulse varied from 1 to 2.7 amperes at full RF transmit power, with corresponding exposure ratios of 0.09 to 0.25. The authors reported that ELF exposures from GSM mobile phones did not exceed either standard, but were "not too far" from the ICNIRP limits.
Findings		Not Applicable to Bioeffects
Status		Completed With Publication
Principal Investigator		STUK, Finland
Funding Agency		Nat'l Res Prog, Finland
Country		FINLAND
References		Jokela , K et al. Health Physics, (2004) 86:56-66
Comments