Patent ID: 11919464
Assignee: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
Field: Measurement (Instruments)
Classification: CPC B  G  H | IPC B  G  H

Claim 0:
1. An occupancy detection system for at least one vehicle seat, the system comprising:
an antenna arrangement, comprising at least one transmit antenna and at least one receive antenna;
a control device adapted to apply a radio-frequency transmission signal to the antenna arrangement and to receive a response signal from antenna arrangement; and
a transmit array comprising a plurality of structured metallic layers disposed above each other and extending laterally, each two neighbouring metallic layers isolated from each other by an intermediate dielectric layer, the transmit array being spaced a distance from the antenna arrangement and interposed between the antenna arrangement and the at least one vehicle seat,
wherein the antenna arrangement is adapted to transmit a radio-frequency transmission field through the transmit array onto the at least one vehicle seat in response to the transmission signal and to receive a radio-frequency response field through the transmit array to generate the response signal, and the transmit array is adapted to refract at least one of the transmission field and the response field and
wherein the transmit array comprises at least one receive section adapted to focus a response field from a position of a vehicle seat to a position of a receive antenna.