Estimated distances to meet RF power
density guidelines with a horizontal half-wave dipole antenna
(estimated gain, 2 dBi). Calculations include the EPA ground reflection
factor of 2.56
Frequency: 7MHz
Estimated antenna gain: 2 dBi
Controlled limit:18.37 mW/cm2
Uncontrolled limit:3.67 mW/cm2
|
Transmitter
Power
(watts)
|
Distance to
controlled
limit
|
Distance to
uncontrolled
limit
|
100
500
1000
1500
|
1.4'
3.1'
4.3'
5.3'
|
3.1'
6.9'
9.7'
11.9'
|
|
Estimated distances to meet RF power
density guidelines in the main beam of a typical 3-element "triband"
Yagi for the 14,21 and 28 MHz amateur radio bands. Calculations
include the EPA ground reflection coefficient of 2.56
Frequency: 28MHz
Estimated antenna gain: 8dBi
Controlled limit:1.15 mW/cm2
Uncontrolled limit:0.23 mW/cm2
|
Transmitter
Power
(watts)
|
Distance to
controlled
limit
|
Distance to
uncontrolled
limit
|
100
500
1000
1500
|
11'
24.5'
34.7'
42.5'
|
24.5'
54.9'
77.6'
95.1'
|
|
Estimated distances
to meet RF power density guidelines in the main beam of a 17-element
Yagi on a five-wavelength boom designed for weak signal communications
on the 144MHz amateur radio and (estimated gain, 16.8 dBi). Calculations
include the EPA ground reflection factor of 2.56
Frequency: 144MHz
Estimated antenna gain: 16.8 dBi
Controlled limit:1 mW/cm2
Uncontrolled limit:0.2 mW/cm2
|
Transmitter
Power
(watts)
|
Distance to
controlled
limit
|
Distance to
uncontrolled
limit
|
10
100
500
1500
|
10.2'
32.4'
72.4
125.5 '
|
22.9'
72.4'
162'
280.6'
|
|
Estimated distances to meet RF power
density guidelines with VHF quarter-wavelength ground plane or
mobile whip antenna (estimated gain, 1 dBi). Calculations include
the EPA ground reflection factor of 2.56
Frequency: 146 MHz
Estimated antenna gain: 1dBi
Controlled limit:1 mW/cm2
Uncontrolled limit:0.2 mW/cm2
|
Transmitter
Power
(watts)
|
Distance to
controlled
limit
|
Distance to
uncontrolled
limit
|
10
50
150
|
1.7'
3.7'
6.4'
|
3.7'
8.3'
14.4'
|
|
Estimated distances to meet RF power
density guidelines in the main beam of UHF 5/8 ground plane or
mobile whip antenna (estimated gain, 4 dBi). Calculations include
the EPA ground reflection factor of 2.56
Frequency: 446MHz
Estimated antenna gain: 4dBi
Controlled limit:1.49 mW/cm2
Uncontrolled limit:0.3 mW/cm2
|
Transmitter
Power
(watts)
|
Distance to
controlled
limit
|
Distance to
uncontrolled
limit
|
10
50
150
|
1.9'
4.3'
7.5'
|
4.3'
9.6'
16.7'
|
|
|