Ericsson RBS 2106 Hardware Reference Manual page 54

Radio Base Station
4.3 Compliance Distances for Electromagnetic Exposure
The compliance distance is the minimum separation that should be kept
between an antenna and a person to ensure that RF exposure limits are not
exceeded.
Ericsson has performed a near-field RF exposure assessment of typical
configurations of the RBS 2106 with a recommended antenna. The resulting
dimensions, in metres, for a compliance boundary for both public and
occupational exposure, are shown in Table 4.
The compliance boundary is defined as a cylinder around the antenna, see
figure below. The antenna is not located at the centre of the cylinder. Instead it
is located almost at the edge, facing in towards the center of the cylinder. The
distance between the antenna's rear and the edge of the cylinder is the
"Distance behind antenna" in Table 4. The height of the cylinder is the antenna
height plus a certain distance above and below the antenna.
Figure 6 Compliance boundary cylinder
Note:
10 (30)
Distance
behind
antenna
Antenna
Table 4 shows an example for a typical antenna. As the antenna field
distributions will differ for different configurations and environments,
complete calculations or measurements may be necessary in order to
establish the compliance boundary for other configurations chosen by
the customer. For further information on calculation methods, see:
Radio Site Installation Engineering
Manual
Diameter
EN/LZT 720 0069
RBS 2106
Height
P009694A
EN/LZT 720 0222 R3A