Recommended safety distances from portable and mobile HF communications equipment
Rated power of transmitter [W]
0.01
0.1
1
10
100
150 kHz + 800 MHz
d = 1.2 √p
0.12 m (0.39 ft)
0.38 m (1.25 ft)
1.2 m (3.9 ft)
3.8 m (12.5 ft)
12 m (39 ft)
800 MHz – 2.5 GHz
d = 2.3 √p
0.23 m (0.76 ft)
0.73 m (2.4 ft)
2.3 m (7.6 ft)
7.3 m (23.9 ft)
23 m (76 ft)
ENG
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