Broadband, dual polarized base station antenna for optimal horizontal radiation pattern and variable vertical beam tilt

摘要

A double polarized antenna (10) with a variable beam angle has a plurality of offset element compartments (12), each of which holds pairs of dipole elements (14) in order to orient the center axis of the dipole element pattern in a downward tilt. The maximum squint value of the antenna corresponds to a downward tilt displacement of the central axis and is located at the center of the tilt area of the antenna. The antenna creates a strong roll-off radiation pattern through the use of Yagi dipole elements. configured in this arrangement, and it has a front-to-side ratio of the beam that is more than 20 ° dB, a horizontal beam-to-back ratio of more than 40 dB, and it is operable in an extended frequency range.