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T6-D-USER-AV100-EN Annex Page 1
© Park Air Systems Limited 2020
Annex
Antenna radiation limits - health and safety
Countries within the European Union
The compliance boundaries can be calculated using method in EN 62232:2017, Determination of field strength,
power density and flux density in the vicinity of radio communication base stations for the purpose of evaluating
human exposure. The limits are shown in the table below:
Notes:
*Occupation level limits in adherence to EU occupational limits directive 2013/35/EU.
*General population level limits in adherence to EU general public limits directive 1999/519/EC.
Example
The safe distance from the antenna can be predicted using the equations:
where,
R = distance to centre of radiation in metres (m)
P = average power input to antenna in Watts (example, 100 W carrier with 95% modulation = 145 W)
G = antenna gain as a ratio (example, 2 dB = 10
2/10
= 1.585)
S = power density in W/m
2
H
H = magnetic field strength (A/m)
Antenna radiation
The transmit antenna must be installed such that the resultant radiated field strength is below
national limits. The safe distance must be calculated for each installation.
Level
Frequency
(MHz)
Power density
(W/m
2
)
Electric field
strength
(V/m)
Magnetic field
strength
(A/m)
Magnetic flux
density
(T)
*Occupational level 100 - 400 61 0.2
μ
*General
population level
100 - 400 2 28 0.073 0.092
μ
R =
PG
4

S
-----------
S H
2 
=
S E
2
 
=
S

B

0
  
2
=