Shared antenna solution for wireless charging and near field communication
AssigneeTexas Instruments Incorporated
InventorsSubhashish Mukherjee, Yogesh Darwhekar, Gireesh Rajendran
Life of this patent
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Abstract
A method of coupling a first port of a single antenna to a first coupling circuit and a second port of the single antenna to a second coupling circuit. The method includes coupling a wireless charging unit to the first coupling unit and coupling an NFC transceiver block to the second coupling circuit. The method further includes isolating the single antenna from the wireless charging unit during a time interval when the NFC transceiver block is operational and isolating the single antenna from the NFC transceiver block during a time interval when the wireless charging unit is operational.
Claims17
An antenna arrangement comprising:
- an outer antenna structure in a form of a flat coil having N1 number of turns, wherein N1 is an integer;
- an inner antenna structure in a form of a flat coil having N2 number of turns, wherein N2 is an integer;
- and
- the outer antenna structure and the inner antenna structure are separated by a distance D.
A computing device comprising:
- a wireless charging unit coupled to an antenna arrangement;
- a NFC transceiver block coupled to the antenna arrangement;
- wherein the antenna arrangement comprises:
- an outer antenna structure;
- and
- an inner antenna structure coplanar with the outer antenna structure and placed within the outer antenna structure, wherein the outer antenna structure and the inner antenna structure are separated by a distance D to reduce an effective inductance offered to the NFC transceiver block.
A method comprising:
- coupling a first port of a single antenna to a first coupling circuit;
- coupling a second port of the single antenna to a second coupling circuit;
- coupling a wireless charging unit to the first coupling circuit;
- coupling an NFC transceiver block to the second coupling circuit;
- isolating the single antenna from the wireless charging unit during a time interval when the NFC transceiver block is operational;
- and
- isolating the single antenna from the NFC transceiver block during a time interval when the wireless charging unit is operational.
Dependencies are inferred from the claim text.