The SAF FreeMile Quick Installation Guide • Rev. 1.1 • Software version 1.53
© SAF Tehnika JSC 2011
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Table 1.1: ICNIRP Reference levels within the frequency range 24 GHz
Frequency range
Exposure
characteristics
Equivalent plane
wave power density
Seq (W/m2)
Average time period
(min)
occupational 45cm
50
68/f
1.05
(f in GHz)
24GHz
general public 100cm
10
68/f
1.05
(f in GHz)
Note: For pulsed signals it is suggested that the peak equivalent plane wave power density, as averaged over the
pulse width, does not exceed 1000 times the Seq exposure levels given in the table.
Note: Within the frequency range the 10 – 300 GHz the basic restrictions are identical to the reference levels.
Remarks to the definition of basic restrictions:
1. Power densities are to be averaged over any 20 cm2 of exposed area and any 68/f1.05 minute period (where f is in
GHz) to compensate for progressively shorter penetration depth as the frequency increases.
2. Spatial maximum power densities, averaged over 1 cm2, should not exceed 20 times the values above.
Compared to the ICNIRP restrictions, FCC CFR 47 specifies the Maximum Permissible
Exposure (MPE) levels for occupational/controlled environment and general
public/uncontrolled environment, as shown in Table 1.2.
Table 1.2: FCC MPE limits within the frequency range 1.5-100 GHz
Frequency range
Exposure
characteristics
Equivalent plane
wave power density
Seq (W/m2)
Average time period
(min)
occupational 45cm
50
6
24GHz
general public 100cm
10
30
Quite a few other documents specify or refer to exposure limits comparable to those given
above, e.g.:
- 1999/519/EC: Council Recommendation of 12 July 1999 on the limitation of exposure of the general public to
electromagnetic
fields (0 Hz to 300 GHz)
- WHO: Environmental Health Criteria 137: ´Electromagnetic Fields (300 Hz to 300 GHz)´
- ANSI/IEEE C95.1, 1999:
´IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz
to 300 GHz´
- BRD, Bundesimmissionsschutzgesetz, 26. BImSchV Verordnung über elektromagnetische Felder
- Bundesamt für Umwelt, Wald und Landwirtschaft (BUWAL), Bern/Schweiz
Schriftenreihe Umwelt Nr. 164, Luft, Mai 1992
´Messung nichtionisierender elektromagnetischer Strahlung, 1. Teil: Frequenzbereich 100 kHz bis 300 GHz´
- DIN VDE 0848-2, Entwurf, Oktober 1991:
´Sicherheit in elektrischen, magnetischen und elektromagnetischen Feldern, ´Teil 2: Schutz von Personen im
Frequenzbereich von
30 kHz bis 300 GHz´
- ENV 50166-2, January 1995 (withdrawed in December 1999 by CENELEC)
´Human Exposure to Electromagnetic Fields (10 kHz – 300 GHz)´
