Page 32 - rise 2017

Next, the design is focused on designing the Rectangular Patch Antenna using the CST
software. The rectangular patch antenna is used the resonant frequency at 2.4 GHz. In medical
application, mostly the antenna will be designing in 2.4 GHz. The calculation dimension of
rectangular patch antenna is listed in Table I below.

Table I
Calculated dimensions of the rectangular patch antenna.
Frequency Width of Length of
Element Width Length Inset feed
(Ghz) Ground Ground
1 2.4 37.02 74.04 29.96 59 9.96

The layout of designing rectangular patch antenna is shown in Figure 2.

Figure 2: Layout of the Rectangular Patch

The rectangular patch antenna is designed and simulated by using the CST software. From
calculated dimension, the result of return loss is -23.601, gain shows 4.3 dB and 0.05 Hz of bandwidth
at 2.33 GHz. The result of S-parameter analysis shows in Figure 3. From Figure 3, the good result of
rectangular patch antenna shows at parameter analysis 7 by minimum return loss at -28.087 dB. From
Table II, the good return loss is shown at frequency 2.4 GHz of -28.087 dB. Figure 3 shows S-
parameter of the antenna. The return loss of the antenna is minimum at 2.4 GHz. From the radiation
pattern simulation, the bandwidth is shown at 2.4 GHz is 0.06 Hz or 6 percent.

Figure 3: Return loss rectangular patch antenna

Table II
Result analysis rectangular patch antenna
Frequency Return Loss Gain Bandwidth %
(Ghz) (dB) (dB) (Hz) Bandwidth
2.4 -28.087 4.09 0.06 6 %