Page 261 - Antennas for Base Stations in Wireless Communications
P. 261
234 Chapter Six
The measured and simulated SWRs of the square-cap coupled fed
case are shown in Figure 6.30. As seen from the SWR curves, the
antenna has a wide impedance bandwidth of 62% (SWR ≤ 2) from 1.83 to
3.50 GHz. Figure 6.31 displays the measured and simulated gain
curves of the antenna. The proposed antenna has a maximum gain of
8.2 dBi at a frequency of 2.15 GHz. Radiation patterns at frequencies
of 1.83, 2.5, and 3.5 GHz were measured and are shown in Figure 6.32.
8
7
6
5
SWR Simulated
4
Measured
3
2
1
1.5 2.0 2.5 3.0 3.5 4.0
Freq/GHz
Figure 6.30 Measured and simulated SWR for a square-cap coupled
fed wideband complementary antenna 55
10
9
8
7
6
Gain/dB 5
4 Simulated
Measured
3
2
1
0
1.5 2.0 2.5 3.0 3.5 4.0
Freq/GHz
Figure 6.31 Simulated and measured gain for a square-cap coupled fed
wideband complementary antenna 55
