SAR
WB (W/kg)
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
HP
HP
HP
VP
VP
VP
7-year-old child-scaled-horizontal polarization
7-year-old child-scaled-vertical polarization
13-year-old child-scaled-vertical polarization
13-year-old child-scaled-horizontal polarization
Adult-horizontal polarization
Adult-vertical polarization
0.9
1.2
1.5
1.8
2.1
2.4
2.7
3
Frequency (GHz)
38
Electromagnetic Fields in Biological Systems
FigurE 1.15 Whole-body-averaged specific absorption rate (SAR) for 10-W/m 2 incident power
density, showing fitted curves for SAR WB max over the frequency range of 900–3000 MHz. (From
Piuzzi, E., P. Bernardi, M. Cavagnaro, S. Pisa, and J. C. Lin. 2011. Analysis of adult and child exposure to uniform plane waves at mobile communication systems frequencies (900 MHz–3 GHz).
IEEE Trans Electromagn Compat 53:38–47. With permission.)
a transition frequency (see the circles in Figure 1.15). It is interesting to note that the
transition frequency is inversely proportional to model size. Moreover, Figure 1.15 suggests that the variation of maximum SAR WB with frequency is approximately linear for
the three body models over the cellular mobile communication frequency range of 900–
3000 MHz if both polarizations are taken into account. Thus, the variation of SAR WB max
with frequency may be approximated by a linear curve-fitting procedure, that is,
S
SAR WB = 3 1
. 0 39· f )·
⎛
⎝ ⎜ ⎠ ⎟ ·P
(1.50)
( − .
⎞
max
inc
M
where f is the frequency in GHz, P inc is incident power density in W/m 2 , and S/M is the
surface-to-mass ratio expressed in the units of square meter per kilogram. A set of fitted
curves are plotted in Figure 1.15. A nearly constant ratio can be seen among the fitted
lines for the three body models over this frequency band. Indeed, a nearly constant ratio
can be seen among the fitted lines for the three body models over the frequency range
of interest.
WB (W/kg)
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
HP
HP
HP
VP
VP
VP
7-year-old child-scaled-horizontal polarization
7-year-old child-scaled-vertical polarization
13-year-old child-scaled-vertical polarization
13-year-old child-scaled-horizontal polarization
Adult-horizontal polarization
Adult-vertical polarization
0.9
1.2
1.5
1.8
2.1
2.4
2.7
3
Frequency (GHz)
38
Electromagnetic Fields in Biological Systems
FigurE 1.15 Whole-body-averaged specific absorption rate (SAR) for 10-W/m 2 incident power
density, showing fitted curves for SAR WB max over the frequency range of 900–3000 MHz. (From
Piuzzi, E., P. Bernardi, M. Cavagnaro, S. Pisa, and J. C. Lin. 2011. Analysis of adult and child exposure to uniform plane waves at mobile communication systems frequencies (900 MHz–3 GHz).
IEEE Trans Electromagn Compat 53:38–47. With permission.)
a transition frequency (see the circles in Figure 1.15). It is interesting to note that the
transition frequency is inversely proportional to model size. Moreover, Figure 1.15 suggests that the variation of maximum SAR WB with frequency is approximately linear for
the three body models over the cellular mobile communication frequency range of 900–
3000 MHz if both polarizations are taken into account. Thus, the variation of SAR WB max
with frequency may be approximated by a linear curve-fitting procedure, that is,
S
SAR WB = 3 1
. 0 39· f )·
⎛
⎝ ⎜ ⎠ ⎟ ·P
(1.50)
( − .
⎞
max
inc
M
where f is the frequency in GHz, P inc is incident power density in W/m 2 , and S/M is the
surface-to-mass ratio expressed in the units of square meter per kilogram. A set of fitted
curves are plotted in Figure 1.15. A nearly constant ratio can be seen among the fitted
lines for the three body models over this frequency band. Indeed, a nearly constant ratio
can be seen among the fitted lines for the three body models over the frequency range
of interest.