Patent ID: 7298262

Claim:
A system for determining seat occupancy in a vehicle, comprising: at least one microwave transmitter, a plurality of reflectors stationarily disposed in predetermined locations at a seat of the vehicle, and at least one microwave receiver, commonly arranged: to define between said microwave transmitter and said microwave receiver a radiation path divided into at least one first radiation path and at least one second radiation path; wherein microwave radiation emitted by said microwave transmitter can reach at least one of said reflectors along the at least one first radiation path when the seat is unoccupied; wherein the microwave radiation, after reflection by said at least one reflector can reach said microwave receiver via the at least one second radiation path; wherein, depending on the seat occupancy, an object may be located in at least one of the first radiation path and the second radiation path and the radiation received by the microwave receiver may be influenced in dependence on the seat occupancy; and wherein said reflectors are modulating backscattering devices.