Tri-band antenna

摘要

A tri-band antenna (10) is provided having a pair of antenna elements (12, 14), in which the first antenna element (14) operates in a first UHF frequency band, and the second antenna element (12) operates in a second VHF band and a third cellular frequency band. The bottom end (12a, 14a) of each of the antenna elements (12, 14) is fixed into a first member (16) from which the antenna elements extend parallel and spaced apart from each other to their different respective heights. A second member (13) couples the antenna elements (12, 14) to each other at a distance from the first member (16) to adjust the operation of the tri-band antenna (10) in at least the UHF band. A base member (19) is provided for mounting the tri-band antenna (10) along a surface of a vehicle. A signal feed member (20) extends through the base member (19) and has one end (20a) attached to the first member (16) and another end (20b) providing a RF connector. The signal feed member (20) provides the antenna elements (12, 14), via the first member (16), with a common signal path for transmission and reception of RF signals in all three bands.

主权项

1. A tri-band antenna comprising:
a pair of antenna elements each having two opposite ends, in which a first of said antenna elements operates to provide a first frequency band, and a second of said antenna elements operates to provide second and third frequency bands; a first member fixed to a first of said ends of each of said antenna elements, in which said antenna elements extend from said first member; a second member couples said antenna elements to each other between said first and second ends of said antenna elements in which said second member is spaced from said first member a distance to adjust the operation of said tri-band antenna in at least said first frequency band; and a third member attachable to said first member to provide said antennal elements, via said first member, with a common signal path for transmission and reception of signals in all three bands.