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Antennas for Mobile Communications: CDMA, GSM, and WCDMA 117
0 0
330 30 330 30
300 60 300 60
270 90 270 90
−35−30−25−20−15−10 −5 0 −35−30−25−20−15−10 −5 0
240 120 240 120
210 150 210 150
180 180
(a) (b)
0 0
330 30 330 30
300 60 300 60
270 90 270 90
−35−30−25−20−15−10 −5 0 −35−30−25−20−15−10 −5 0
240 120 240 120
210 150 210 150
180 −45° polarization 180
(c) +45° polarization (d)
Figure 3.15 Measured radiation patterns of the dual-band dual-polarized patch antenna
array at 0.9 GHz: (a) x-z plane, port 1; (b) y-z plane, port 1; (c) x-z plane, port 2; and (d)
9
y-z plane, port 2 (© 2005 IEEE)
3.2.4 Case 4: A Broadband Monopolar
Antenna for Indoor Coverage
In this section, a broadband monopolar antenna is presented. It has a
wide impedance bandwidth of 62% for a SWR < 1.5, ranging from 1.48
to 2.81 GHz. It possesses nearly omnidirectional radiation patterns over
the bandwidth. Moreover, it has a moderate peak gain of 6.1 dBi. Due
to these features, it is very suitable for the modern multiband indoor
mobile communication systems.
