Land Rover

Christopher Richard Bottomley

Jeremy John Greenwood

Kevin Trevor Talbot

A security system is disclosed which is suitable for use in a passive entry and passive starting arrangement for a vehicleA set of transmitters in the form of coils A, B, C are spaced around the vehicleone A, B in each door mirrorR,L and one in a high level brake lightat the rear end. Operation of a door handle initiates an access challenge from the vehiclewhich is sent out successively on a plurality of the coils A, B, C. A portable transpondercarried by an authorised user is adapted to pick up the challenge signal and send back to a security controllera response signal in which is included vector information relating to the relative positioning between the vehicleand the transponder

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Coventry, United Kingdom

Christopher Richard Bottomley