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The microwave energy radiated by a radar antenna is harmful to humans, especially to
the eyes. NEVER look directly into an open waveguide or into the path of radiation from
an enclosed antenna. Radar and other radio frequency radiation can upset cardiac
pacemakers. If someone with a cardiac pacemaker suspects abnormal operation,
immediately turn off the radar equipment and move the person away from the antenna.
Turn off the radar whenever it is necessary to work on the antenna unit or other
equipment in the beam of the radar.
Note! Most countries accept that RF power density levels below 100 W/m2 cause no significant RF
hazard.
Scanner
Model
Vertical beam
angle of
scanner
(degrees)
Minimum safe distance
(100 Watts per m²
average power density)
Note 1
Minimum safe distance
(10 Watts per m²
average power density)
Note 2
2 kW 30 1.6 ft (0.5 m) 4.6 ft (1.4 m)
4 kW 25 3 ft (0.9 m) 9.3 ft (2.8 m)
6 kW 20 3.6 ft (1.1 m) 11.5 ft (3.5 m)
10 kW 20 9.5 ft (2.9 m) 30 ft (9.0 m)
25 kW 20 18 ft (5.5 m) 57 ft (17.4 m)
NOTES: Limits apply to exposure within the vertical beam angle.
Note 1: Peak occupational exposure limit pursuant to IEC 60936 Clause 3.27 and IEC 62252
Clause 4.32
Note 2: General public exposure limit pursuant to IEC 60936 Clause 3.27 and IEC 62252 Clause
4.32