Left-hand circular polarized antenna for use with GPS systems
AssigneeATX Research, Inc.
InventorRussell M. Herring
Life of this patent
Estimating the term…
Abstract
An antenna system, comprising a left-hand circular polarized antenna, is disclosed for use in receiving signals from a GPS location satellite which are originally-transmitted as RHCP signals. Reception occurs after the right-hand circular polarized signal is reflected, or bounces off of, a surface one or more times. The number of reflections must be an odd number. The left-hand circular polarized antenna may be mounted underneath a vehicle or a building overhang. The method of the invention comprises the steps of transmitting a right-hand circular polarized signal and receiving the signal using a left-hand circular polarized antenna placed in a location where the right-hand circular polarized signal must be reflected by an odd number of surfaces before reception.
Claims20
An antenna system, comprising:
- a left-hand circular polarized antenna for receiving a non-line of sight satellite GPS location signal;
- and
- a surface, wherein the non-line of sight satellite GPS location signal is reflected from the surface.
A method for obtaining a GPS location signal, said method comprising the steps of:
- transmitting a right-hand circular polarized GPS location signal from an orbiting satellite;
- and
- receiving said right-hand circular polarized GPS location signal with a left-hand circular polarized antenna by placing said left-hand circular polarized antenna in a location where said right-hand circular polarized GPS location signal must be reflected by an odd number of surfaces before being received by said left-hand circular polarized antenna.
A vehicle equipped for receiving a satellite right-hand circular polarized signal, said vehicle comprising:
- a left-hand circular polarized antenna;
- and
- a surface facing away from the satellite right-hand circular polarized signal line-of-sight, said antenna being attached to said surface so as to receive the satellite right-hand circular polarized signal as a left-hand circular polarized signal.
Dependencies are inferred from the claim text.