User guide

Release9.5ReleaseNotes
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Issue2,October2009  Page67
S 
P 
G
4  d
2
where
S = power density in W/m
2
P = RMS transmit power capability of the radio, in W
G = total Tx gain as a factor, converted from dB
d = distance from point source, in m
Rearranging terms to solve for distance yields
d 
P  G
4
 S
Table 16 shows calculated minimum separation distances d , recommended distances and
resulting power compliance margins for each frequency band and antenna combination.
Table 16: Calculated exposure distances and power compliance margins
Band Antenna
Variable
d
(calcu-
lated)
Recom-
mended
Separation
Distance
Power
Compliance
Margin
P G
S
900 MHz integrated 0.25 W
(24 dBm)
15.8
(12 dB)
6 W/m
2
23 cm 80 cm
(32 in)
12
external Yagi 0.063 W
(18 dBm)
50.1
(17 dB)
6 W/m
2
20 cm 80 cm
(32 in)
15
external flat panel 0.39 W
(26 dBm)
10.0
(10 dB)
6 W/m
2
23 cm 80 cm
(32 in)
12
indoor, integrated Simulation model used to estimate Specific
Absorption Rate (SAR) levels
10 cm
(4 in)
2
2.4 GHz integrated 0.34 W
(25 dBm)
6.3
(8 dB)
10
W/m
2
13 cm 20 cm
(8 in)
2.3
integrated
plus reflector
0.34 W
(25 dBm)
79.4
(19 dB)
10
W/m
2
46 cm 1.5 m
(5 ft)
10
5.2 GHz integrated 0.2 W
(23 dBm)
5.0
(7 dB)
10
W/m
2
9 cm 20 cm
(8 in)
5
integrated plus
reflector
0.0032 W
(5 dBm)
316
(25 dB)
10
W/m
2
9 cm 1.5 m
(5 ft)
279
integrated plus
LENS
0.025 W
(14 dBm)
40
(16 dB)
10
W/m
2
9 cm 50 cm
(12 in)
31
5.4 GHz integrated 0.2 W
(23 dBm)
5.0
(7 dB)
10
W/m
2
9 cm 20 cm
(8 in)
5
integrated plus
reflector
0.0032 W
(5 dBm)
316
(25 dB)
10
W/m
2
9 cm 1.5 m
(5 ft)
279
integrated plus
LENS
0.020 W
(13 dBm)
50
(17 dB)
10
W/m
2
9 cm 50 cm
(12 in)
31