US 12,438,574 B2
Mobile device that processes different applications sharing the same antenna
Jernej Izak, Graz (AT); and Francesco Antonetti, Graz (AT)
Assigned to Renesas Design Austria GmbH, Graz (AT)
Appl. No. 19/101,344
Filed by Renesas Design Austria GmbH, Graz (AT)
PCT Filed May 15, 2023, PCT No. PCT/EP2023/062971
§ 371(c)(1), (2) Date Feb. 5, 2025,
PCT Pub. No. WO2024/027965, PCT Pub. Date Feb. 8, 2024.
Claims priority of application No. 22188740 (EP), filed on Aug. 4, 2022.
Prior Publication US 2025/0260441 A1, Aug. 14, 2025
Int. Cl. H04B 5/79 (2024.01); G06Q 20/34 (2012.01); H02J 50/12 (2016.01); H03H 7/38 (2006.01); H04B 5/48 (2024.01)
CPC H04B 5/79 (2024.01) [G06Q 20/352 (2013.01); H02J 50/12 (2016.02); H03H 7/38 (2013.01); H04B 5/48 (2024.01)] 6 Claims
OG exemplary drawing
 
1. A mobile device for wireless communication with another device and to enable a charge application to charge a battery of the mobile device based on a magnetic field with a specified carrier frequency in the HF frequency area, the mobile device comprising: a communication stage with a communication unit connected via a first matching unit with a first antenna to optimize for a load modulated communication with the other device; and a charge stage with a charge unit connected via a second matching unit with a second antenna to optimize for wireless charging of the battery of the mobile device, wherein: the first and second antennas are realized as only one single antenna; the communication stage comprises a first switch stage arranged in the path between the communication unit and the single antenna and connected directly to two output ports of the communication unit to connect or disconnect the communication unit to/from the single antenna; the charge stage comprises a second switch stage arranged in the path between the charge unit and the single antenna and connected directly to two output ports of the charge unit to connect or disconnect the charge unit to/from the single antenna; the mobile device further comprises a controller stage connected to the first switch stage and the second switch stage to connect the communication unit with and to disconnect the charge unit from the single antenna in a communication mode of the mobile device and to connect the charge unit with and to disconnect the communication unit from the single antenna in a charge mode of the mobile device, wherein the first matching unit and the second matching unit are realized with at least one capacity in common; the first matching unit is built to tune the single antenna at a resonance frequency different than the carrier frequency of 13.56 MHz and that the second matching unit is built to tune the single antenna at a resonance frequency identical to the carrier frequency of 13.56 MHz; and the first switch stage is arranged between output ports of the communication unit and the first matching unit and that the first switch stage is realized to short circuit the output ports of the communication unit in the charge mode of the mobile device.