2.4/5-GHz dual-band vertically/horizontally dual-polar ized omnidirectional antennas for WLAN base station

This paper proposed a novel antenna configuration to achieve 2.4/5 GHz-dual-band WLAN base station antennas with vertically/horizontally dual-polarized omnidirectional radiation pattern in the horizontal plane. The proposed antenna provides a VSWR of 2 in the 2.4-2.5 and 4.9-6-GHz bands and satisfies all the bands required for the IEEE 802.11n standard. Good omnidirectional radiation patterns are achieved such that the averages of the deviation levels, gain, and XPDs for the radiation patterns in the horizontal plane over both bands for the vertically and horizontally polarized antennas are approximately 2.7 dB, -0.8 dBi, and 14 dB, and 5.5 dB, 0.3 dBi, and 10 dB, respectively.