Multi-frequency NFC antenna
AssigneeEthertronics, Inc.
InventorsLaurent Desclos, Sebastian Rowson, Jeffrey Shamblin
Life of this patent
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Abstract
An antenna system is proposed that consists of a radiator integrated into the display of a mobile device. The antenna can be configured to service multiple frequency bands to include NFC (Near Field Communication), FM, TV, GPS, and/or Bluetooth/WiFi. When optimized for the NFC function, the display of the mobile device can be pointed in the direction of or positioned in close proximity to the NFC reader to facilitate the transaction, providing a more natural set of motions for the user. The antenna can contain multiple feed or connect points, and can contain active components to switch to or optimize for the various frequency bands.
Claims14
An antenna system, comprising:
- within a display assembly having a glass layer thereof, a conductor embedded in the glass layer of the display assembly, the glass layer forming a low-loss substrate surrounding the conductor;
- the conductor being bent in a shape configured to generate an inductive field capable of coupling to an external field when connected to a receiver, transceiver, or circuit that modulates impedance.
An multi-frequency NFC antenna system, comprising:
- a conductor coupled to an active component to form a multi-frequency antenna;
- said conductor being coupled to a switch, wherein said switch is adapted to couple to a plurality of devices selected from:
- a Bluetooth receiver, TV receiver, FM receiver, and NFC circuit;
- and
- a CPU coupled to each of the switch and the active component via control lines extending therebetween, the CPU being configured to vary a frequency response of the conductor to achieve one of a plurality of possible frequencies thereof, and the CPU being further configured to control the switch for connecting the multi-frequency antenna to one of said devices.
Dependencies are inferred from the claim text.