A left-hand circular polarized antenna for use with gps systems

H - Electricity – 01 – Q

Patent

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Details

H01Q 1/32 (2006.01) H01Q 1/38 (2006.01) H01Q 9/04 (2006.01) H01Q 21/26 (2006.01)

Patent

CA 2330037

An antenna system, comprising a left-hand circular polarized antenna (50), is disclosed for use in receiving signals from a GPS location satellite (10) 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 (50) may be mounted underneath a vehicle (70) or a building overhang (300). The method of the invention comprises the steps of transmitting a righ-hand circular polarized signal and receiving the signal using a left-hand circular polarized antenna (50) placed in a location where the right-hand circular polarized signal must be reflected by an odd number of surfaces before reception.

L'invention concerne un système d'antenne comprenant une antenne polarisée circulairement à gauche (50), qui permet de recevoir d'un satellite de localisation GPS (10) des signaux qui, à l'origine, sont transmis sous forme de signaux polarisés circulairement à droite (RHCP). La réception se fait après réflexion ou rebond depuis une surface, une ou plusieurs fois, du signal polarisé circulairement à droite. Le nombre de réflexions doit être un nombre impair. L'antenne (50) peut être montée sous un véhicule (70) ou un surplomb (300) de bâtiment. Le procédé de l'invention consiste à émettre un signal polarisé circulairement à droite, puis à recevoir ledit signal au moyen d'une antenne polarisée circulairement à gauche (50), disposée à un emplacement où le signal polarisé circulairement à droite peut être réfléchi, avant sa réception, par un nombre impair de surfaces.

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