User's Manual

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INTEGRA User Manual OVERVIEW

Microwave Radiation

In April 1998, ICNIRP (International Commission on Non-Ionizing Radiation Protection)

published its ´Guidelines for limiting exposure to time-varying electric, magnetic, and

electromagnetic fields (up to 300GHz)´. As shown in Table 2.2-1, the guidelines (Tables 6

and 7) specify the ´Reference levels on power density for occupational exposure and general

public exposure to time-varying electric and magnetic fields (unperturbed rms values)´

between 2 and 300 GHz.

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)

24GHz

occupational 41cm

68/f

1.05

(f in GHz)

general public 91cm

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 the table below.

FCC MPE limits within the frequency range 1.5-100 GHz