Tri-pole antenna element and antenna array

摘要

A dual polarized base station antenna is provided, including a reflector having a longitudinal axis and an array of tri-pole elements disposed on the reflector. Each tri-pole element has a first side arm and a second side arm. The tri-pole element also includes a center arm which is approximately perpendicular to the first and second side arms. The tri-pole elements are oriented such that either the side arms or the center arm are parallel to the longitudinal axis of the reflector. The antenna further includes a feed network having a first signal path coupled to the first arms of the tri-pole elements and a second signal path coupled to the second anus of the tri-pole elements. In this example, the array of tri-pole elements produces a cross-polarized beam at +45 degrees and −45 degrees from the longitudinal axis. Tri-pole arrays may be used in a multiband antenna.

主权项

1. A dual polarized base station antenna, comprising: a reflector having a longitudinal axis; an array of tri-pole elements disposed on the reflector, each tri-pole element having arms consisting of:
i. a first side arm; ii. a second side arm; and iii. a central arm, approximately perpendicular to the first and second side arms; said first side arm, said second side arm, and said central arm electrically connected to each other; wherein one of the first side arm and the center arm is parallel to the longitudinal axis; and a feed network having a first microstrip line coupled to the first arms of the tri-pole elements and a second microstrip line coupled to the second arms of the tri-pole elements, said first and second microstrip lines having a common ground conductor coupled to the central arm.