Page 35 - rise 2017

(a)

(b)

Figure 7: Parametric study thickness of fat rectangular patch antenna
(a) Pattern gain and (b) Return loss

From observation thickness of fat analysis, there is no correlation for return loss and
bandwidth. By increasing the thickness of fat, the gain pattern is slightly move upward (4.48 dB) and
followed by slightly increased at S-parameter to -22.084 dB. According to journal of Peter S Hall,
other part of body centric (except skin, muscle and lung), there are not taken into consideration due to
their relatively small volumes [5][6]. Figure 7 shows the parametric study of thickness of fat, pattern
of gain and return loss.
From analysis of skin, the increased thickness of skin can effected the efficiency of return loss
shown in Table V. During the observation, it is show linearly relationship between thickness of skin
and return loss. There have human tissue property which the dielectric material proved adequate that
the skin depth at the frequency characteristics is very small and the transmission power is very low
values [5][6]. Besides that, observation from farfield gain pattern shows slightly upward and
downward due the increase of skin thickness. Figure 8 below shows the result of analysis thickness of
skin increased to 8mm.