Patent ID: 11971471
Assignee: VITESCO TECHNOLOGIES GMBH
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for detecting an approach of an object on a lateral side of a moving motor vehicle, said vehicle being fitted with door handles on said lateral side, each of which includes an ultra-high-frequency antenna configured, when the vehicle is stationary, to detect a presence of a portable user apparatus in a vicinity of the vehicle and to identify said apparatus in order to validate hands-free access to the vehicle for a user, said method comprising:
emitting, by each one of the antennas an electromagnetic field, a first radiated power per steradian of which, in a first zone oriented toward the outside of the vehicle and defined by a first aperture angle, is greater than a second radiated power per steradian in a second, lateral zone directed toward another one of the antennas and defined by a second aperture angle; and
when the vehicle is moving, validating detection of the approach of the object by receiving, by at least one of the antennas the electromagnetic field emitted by the other one of the antennas and reflected by the object a received power of which is higher than a predetermined minimum received power.