# US 12,007,522 B2 · Presence detection sensor for a motor vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,522 B2 - Document ID: US12007522B2 - Status: Granted - Kind: B2 - Application number: 17/289,284 - Filed: 2019-10-25 - Published: 2021-08-12 - Granted: 2024-06-11 - Earliest claimed: 2018-10-30 - Assignees: Vitesco Technologies GmbH - Applicants: Vitesco Technologies GmbH - Inventors: Xavier Hourné - Web page: https://patentgrep.com/patent/US12007522B2 ## CPC - G01V 3/101: {by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil (measuring impedance or characteristics derived therefrom G01R27/00, e.g. quality factor G01R27/26)} - H03K 17/945: Proximity switches (H03K17/96 takes precedence) - E05B 81/76: Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles - H04B 5/70: specially adapted for specific purposes - H05K 1/0243: {Printed circuits associated with mounted high frequency components} - H05K 2201/10098: Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas - H05K 2201/10151: Sensor - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - H04B: TRANSMISSION - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract Disclosed is a detection sensor for detecting the presence of an item of user equipment through near-field communication for a motor vehicle, the sensor including an antenna, an impedance matcher, a driver module for driving the antenna and a microcontroller, which is configured to control the driver module, the impedance matcher being able to match the output impedance of the driver module to the impedance of the antenna while amplifying the power supplied by the driver module. The sensor includes a resistive module, mounted between the driver module and the impedance matcher, configured to stabilize the value of the input power of the impedance matcher. ## Claims ### Claim 1 A detection sensor to detect a presence of an item of user equipment through near-field communication, said detection sensor being configured to be mounted in a motor vehicle, the detection sensor comprising: an antenna; a driver module configured to drive the antenna; an impedance matcher configured to match the output impedance of the driver module to the impedance of the antenna and configured to amplify the voltage and the current supplied by the driver module; a resistive module mounted between the driver module and the impedance matcher, the resistive module comprising at least one resistor configured to stabilize the value of the input power of the impedance matcher; and a microcontroller configured to control the driver module. ### Claim 2 (depends on 1) The sensor as claimed in claim 1, wherein the resistive module has a resistance value between plus or minus 80% of the value of the real part of the matching impedance of the impedance matcher. ### Claim 3 (depends on 2) The sensor as claimed in claim 2, wherein the resistive module has a resistance value between 1 and 100 ohms. ### Claim 4 (depends on 2) The sensor as claimed in claim 2, wherein the microcontroller, the driver module, and the impedance matcher are mounted on a printed circuit board. ### Claim 5 (depends on 2) A motor vehicle comprising at least one sensor as claimed in claim 2. ### Claim 6 (depends on 1) A method for stabilizing power supplied by the driver module to the impedance matcher of the detection sensor as claimed in claim 1 for a motor vehicle, the method comprising: stabilizing the power by the resistive module of the detection sensor, the resistive module connected between the driver module and the impedance matcher. ### Claim 7 (depends on 1) The sensor as claimed in claim 1, wherein the resistive module has a resistance value between the value of the real part minus 40% and the value of the real part plus 40% of the matching impedance of the impedance matcher. ### Claim 8 (depends on 7) The sensor as claimed in claim 7, wherein the resistive module has a resistance value between 1 and 100 ohms. ### Claim 9 (depends on 7) The sensor as claimed in claim 7, wherein the microcontroller, the driver module, and the impedance matcher are mounted on a printed circuit board. ### Claim 10 (depends on 7) A motor vehicle comprising at least one sensor as claimed in claim 7. ### Claim 11 (depends on 1) The sensor as claimed in claim 1, wherein the resistive module has a resistance value between the value of the real part minus 20% and the value of the real part plus 20% of the matching impedance of the impedance matcher. ### Claim 12 (depends on 11) The sensor as claimed in claim 11, wherein the resistive module has a resistance value between 1 and 100 ohms. ### Claim 13 (depends on 11) The sensor as claimed in claim 11, wherein the microcontroller, the driver module, and the impedance matcher are mounted on a printed circuit board. ### Claim 14 (depends on 1) The sensor as claimed in claim 1, wherein the resistive module has a resistance value equal to the value of the real part of the matching impedance of the impedance matcher. ### Claim 15 (depends on 14) The sensor as claimed in claim 14, wherein the resistive module has a resistance value between 1 and 100 ohms. ### Claim 16 (depends on 14) The sensor as claimed in claim 14, wherein the microcontroller, the driver module, and the impedance matcher are mounted on a printed circuit board. ### Claim 17 (depends on 1) The sensor as claimed in claim 1, wherein the resistive module has a resistance value between 1 and 100 ohms. ### Claim 18 (depends on 17) The sensor as claimed in claim 17, wherein the microcontroller, the driver module, and the impedance matcher are mounted on a printed circuit board. ### Claim 19 (depends on 1) The sensor as claimed in claim 1, wherein the microcontroller, the driver module, and the impedance matcher are mounted on a printed circuit board. ### Claim 20 (depends on 1) A motor vehicle comprising at least one sensor as claimed in claim 1.