Page 143 - Antennas for Base Stations in Wireless Communications
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116 Chapter Three
10 13
5 12
0 11
−5 10
S parameter (dB) −10 9 8 Gain (dBi)
−15
−20
−25 7 6
−30 5
−35 4
−40 3
0.75 0.8 0.85 0.9 0.95 1 1.05
Frequency (GHz)
lower band port 2 lower band port 1
S11 S22 S12,S21
(a)
0 16
−5 14
−10 12
S parameter (dB) −15 10 Gain (dBi)
8
−20
−25
6
−30 4
−35 2
−40 0
1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4
Frequency (GHz)
lower band port 2 lower band port 1
S11 S22 S12,S21
(b)
Figure 3.14 Measured S parameter and gain of the dual-band dual-polarized
9
patch antenna array: (a) lower band and (b) upper band (© 2005 IEEE)
