IV. DESIGN OF THREE FEED APERTURE
COUPLED ANTENNA
To enhance the impedance bandwidth a new geometry
of antenna is introduced with three feed technique [6]. The
dimensions of structure of three feed antenna is shown in
table 3. This geometry (figure 4.1) used a substrate 0.508
mm thick RT Duroid 5880 substrate with r is 2.2. The
results are shown in figure 4.2 and 4.3. The return loss of
three feed antenna is -28 dB (at 10.64 GHz) and impedance
bandwidth at -10 dB return loss curve is 29% (8.75-
11.68GHz).