Forty-five degree dual broad band base station antenna

摘要

The present invention relates to a multiband antenna specifically adapted for use with a Base Station Antenna (“BSA”). The present invention provides narrow azimuth or horizontal beamwidth (“HBW”) having 45 degrees and operational over four frequency bands. The composite antenna topology and associated circuitry described in embodiments achieves reduced antenna installation requirements and allows for ease of network deployment or reconfiguration at reduced cost. Embodiments employ an array of low band radiating elements and two sets of high band radiating elements. The first set is co-located within an array of low band radiating elements. The second set of is offset and outside the low band radiating elements. An RF feed network energizes the first and second set of high band radiating elements to compensate for interference between the high and low band elements.

主权项

1. An antenna assembly, comprising:
a reflector; an array of first frequency band radiating elements configured above the reflector, the elements arranged in one or more columns extending in a first direction; a plurality of second frequency band radiating elements configured above the reflector including first and second sub groups, each of the first sub group of radiating elements essentially co-located with a corresponding first frequency band radiating element, and wherein the second sub group of radiating elements are configured outside of the first frequency band radiating elements, the second sub group offset with respect to the first sub group of radiating elements in the first direction, wherein the first and second sub groups of radiating elements comprise a plurality of commonly-fed elements of a series of radiating triplets, wherein each of the series of radiating triplets is configured in triangular relationship, and wherein the series of radiating triplets comprise dual band radiating elements, to provide a desired horizontal plane beamwidth; and an RF feed network coupled to each radiating element of the first and second sub groups, the RF feed network providing a first communication signal having a first power level to the first sub group, the RF feed network providing a second communication signal having a second power level differing from the first power level to the second sub group, wherein the operating frequency of the first frequency band radiating elements is lower than the operating frequency of the second frequency band radiating elements, and the first power level is different from the second power level to compensate for increased beamwidth caused by co-location of each of the first subgroup of radiating elements with the corresponding first frequency hand radiating element.