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

摘要

A dual polarized variable beam tilt antenna ( 10 ) having a plurality of offset element trays ( 12 ) each supporting pairs of dipole elements ( 14 ) to orient the dipole element pattern boresight at a downtilt. The maximum squint level of the antenna is a consistent downtilt off of boresight and which is at the midpoint of the antenna tilt range. The antenna provides a high roll-off radiation pattern through the use of Yagi dipole elements configured in this arrangement, having a beam front-to-side ratio exceeding 20 dB, a horizontal beam front-to-back ratio exceeding 40 dB, and is operable over an expanded frequency range.