A novel array formed by diamond antennas with high isolation for base station applications

A novel linear array formed by diamond antennas with low profile and high isolation is developed and studied experimentally in this paper. The array can provide unidirectional patterns with a HPBW (Half-Power Beam Width) of 65±6° in azimuth plane and more than 15dBi peak gain in 1710–2170MHz with VSWR≪1.5. The antenna consists of five dual-polarized array elements named “four-diamond” antenna. The isolation of two different polarized input ports of the array can be enhanced to −30dB by employing some isolation enhancement technologies. A dual-polarized broadband linear array is fabricated and the measured results are presented. The proposed array antenna is suitable for the GSM1800, CDMA1900 and ITU´s IMT-2000 base station applications.