Page 33 - rise 2017

Designing Rectangular Antenna in On-Body Centric Communication
Rectangular Patch Antenna is designing in three layer of body centric such as skin, fat and muscle
using CST software. The three layers of skin, fat and muscle is setting according to the value of
permittivity and conductivity for correct modelling. The relative permittivity and conductivity of skin
are set to 38.1 and 1.441 S/m. For muscle, the value of permittivity and conductivity are set to 52.7
and 1.705 S/m [5][6].
Figure 4 shows the layout of designing rectangular patch antenna in three layer body centric
of skin, fat and muscle. Table 3 shows the properties of parametric bio tissue for skin, fat and muscle
patch antenna in On-Body Centric. Layer 1 is setting to skin, Layer 2 is setting fat and Layer 3 is
setting to muscle. Each parametric properties of baby, boy, girl, women, man, is same as Table III for
skin, fat and muscle.

Figure 4: Layout Rectangular Patch Antenna in three layer body centric of Skin, Fat and Muscle

Table III
Parametric skin, fat and muscle for body centric
Body Tissue Skin Fat Muscle
Type Normal Normal Normal
Nth order model, Nth order model, Nth order model,
Disp. eps
N=3(fit) N=3(fit) N=3(fit)
Mue 1 1 1
Mag. Cond. 1.441 [/(Sm)] - 1.441 [/(Sm)]
3
3
3
Rho 1100 [kg/m ] 910 [kg/m ] 1041 [kg/m ]
Therm. cond. 0.293 [W/K/m] 0.201 [W/K/m] 0.53 [W/K/m]
Heat cap 3.5 [kJ/K/kg] 2.5 [kJ/K/kg] 3.546 [kJ/K/kg]
2
2
2
Diffucivity 7.61039e-008[m /s] 8.83516e-008[m /s] 1.43578e-007[m /s]
3
3
3
Bloodflow 9100 [W/K/m ] 1700 [W/K/m ] 2700 [W/K/m ]
3
3
3
Metab. rate 1620 [W/m ] 300 [W/m ] 480 [W/m ]

Each body tissue layer is design to 3mm. From the simulation, S parameter for return loss is
shown at Figure 5. The minimum return loss is shows at -22.092 dB and the bandwidth shows 0.06
dB. From Figure 6 shows the analysis gain pattern of the antenna in the farfield. The maximum gain
of the antenna is 3.37 dB.