Patent ID: 9531482
Filing Date: 2016-12-27
CPC Classification: H01Q,H04B

Claim Text:
1. An antenna system, comprising: a housing having a tubular body defining an axis, a lower disc-shaped end cap enclosing a lower portion of the tubular body, and an upper disc-shaped end cap enclosing an upper portion of the tubular body, the body, upper end cap and lower end cap defining a first cavity, and the upper end cap having an upwardly projecting dome defining a second cavity, the housing, furthermore, being fabricated from materials which are transparent to RF energy; an antenna assembly disposed internally of the housing and including a hub rotatable about the axis, the hub mounting a plurality of sector antennas to form a polygon arrangement about the axis, the plurality of sector antennas including: a global positioning system (GPS) antenna disposed about the central axis, mounting to the hub and projecting into the second cavity of the housing, the GPS antenna configured to conduct mid-band RF energy for providing GPS input signals; at least two low-band splitters each configured to conduct low-band RF energy from an input to multiple outputs, each of the outputs connecting to one of the low-band antennas of at least two of the plurality of sector antennas; at least two high-band splitters each configured to conduct high-band RF energy from an input to multiple outputs, each of the outputs connecting to one of the high-band antennas of at least two of the plurality of sector antennas; at least two multiplexers each configured to selectively conduct off-set, polarized low and high-band RF energy from a single input to multiple outputs, one of the multiplexers conducting low-band RF energy to each of the at least two of the low-band splitters and the other of the multiplexers conducting high-band RF energy to each of the at least two high-band splitters; the output of at least one of the multiplexers conducting mid-band RF energy to the GPS antenna to transmit and receive GPS signal data; wherein the sector antennas are configured to produce a pseudo-omnidirectional radiation pattern of RF energy about the axis, the radiation pattern producing at least one null region along a radial of the axis; and wherein the antenna assembly is rotatable about the axis to align the null region with a measured peak value of passive intermodulation (PIM) distortion.