Abstract: A method for detecting an object to be charged on a charging surface of a charging device, the device including at least three near-field communication antennas, two antennas each being located at one end of the device, and a third antenna being located between the two antennas. The method includes: calculating a current flowing in each of the antennas; calculating a current variation between the three antennas; comparing the variation with a predetermined current variation threshold value; and detecting an object to be charged on the surface of the charging device on the basis of the result of the comparison.

Abstract: A device for activating a vehicle function. The device being intended to be housed on board a vehicle and includes at least one ultra-wideband communication antenna and at least one near-field communication antenna in order to communicate with an item of portable equipment carried by a user. The function being activated based on a location of the item of equipment with respect to the vehicle and on an authentication of the item of equipment. The windings of the near-field communication antenna delimit a perimeter of a receptacle in which the ultra-wideband communication antenna is located.

Abstract: A communicating device for a motor vehicle, including a control printed circuit board, a first antenna, called “external” antenna, including two groups of windings each arranged around one of the ends of the control printed circuit board, symmetrically with respect to an orthogonal plane, a second antenna, called “internal” antenna, including two groups of windings each arranged around the control printed circuit board between the windings of the first antenna and symmetrically with respect to the orthogonal median plane.

Abstract: A method for detecting an object to be charged, by a charging device, including a transmitting coil and a microcontroller which are suitable for charging a portable item of user equipment at an operating frequency. The method including the following steps: transmitting a predetermined number of voltage pulses at the terminals of the transmitting coil, at a parasitic resonant frequency, contained in a window of values, the resonant frequency being different and distinct from the operating frequency; measuring the voltage at the terminals of the transmitting coil; comparing a frequency of the voltage thus measured and the window of values; if the frequency of the voltage is contained in the window of values, then detecting a portable item of user equipment to be charged.

Abstract: A method for detecting an object to be charged by an induction-charging device including at least one transmitting coil. The method includes transmission, by the at least one coil, of an electrical pulse the value of which is within a window of values predetermined using test receivers, and the object to be charged generating a communication signal in response. The method including, if charging conditions are favorable, the modulation of the value of the electrical pulse outside of the window of predetermined values according to the presence and/or the value of the communication signal, in order to detect the presence of an object to be charged.

Abstract: A method for detecting a foreign metal object, by way of a charging device, including a microcontroller and a transmitting circuit, having at least one transmitting antenna, which are suitable for charging a portable item of user equipment placed on a charging surface at an operating frequency, the method including a) transmitting a predetermined number of voltage pulses at the terminals of the transmitting antenna, at a parasitic resonant frequency, the parasitic resonant frequency being different and distinct from the operating frequency; b) determining an oscillating frequency of the transmitting circuit; c) if the oscillating frequency is higher than the parasitic resonant frequency, then a foreign metal object is detected on the charging surface.