Roadside beacon system with polarized beams

Details Roadside beacon system with polarized beams Roadside beacon system with polarized beams

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G08G 1/123 (2006.01) G01S 1/04 (2006.01) G08G 1/09 (2006.01) G08G 1/0968 (2006.01) G08G 1/13 (2006.01)

Patent

CA 1318009

S-02-46920M/KH/87 ABSTRACT In a roadside beacon system for transmitting to vehicles moving along roads signals on position and direction, linearly polarizing antennas mounted to be stationary either beside or above the roads and other linearly polarizing antennas mounted to be mobile on the vehicles. The downwardly transmitting stationary and the upwardly receiving mobile antennas have matching linear polarizations when the vehicle is traveling on the road adjacent to the antenna but a mobile antenna will have reduced sensitivity when moving on a road at a different angle.

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