Receive antenna for wireless power transfer

• US 9,178,387 B2
• Filed: 10/10/2008
• Issued: 11/03/2015
• Est. Priority Date: 05/13/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Mohammadian, Alireza Hormoz, Kasturi, Sreenivas, Kirby, Miles Alexander Lyell, Ozaki, Ernest T., Toncich, Stanley Slavko, Tran, Allen Minh-Triet
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US12/249,881
• Publication Number:
  US 20090284227A1
• Time in Patent Office: 2,580 Days
• Field of Search: 320/108, 320/109, 320/139, 320/140, 310/50
• US Class Current: 1/1
• CPC Class Codes: G06K 19/0701 at least one of the integrated circuit chips comprising an arrangement for power management
• CPC Class Codes: G06K 19/0715 the arrangement including means to regulate power transfer to the integrated circuit
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10178 including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field comparable booster antennas integrated on the record carrier itself G06K19/07794
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/502 the energy repeater being integrated together with the emitter or the receiver
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/48 Transceivers
• CPC Class Codes: H04B 5/72 : for local intradevice communication
• CPC Class Codes: H04B 5/79 : for data transfer in combination with power transfer

Abstract

Exemplary embodiments are directed to wireless power transfer to an electronic circuit including a wireless charging receive antenna comprising a first loop of an energy receiving conductor and at least another loop of said energy receiving conductor electrically coupled to the first loop. The loops form a multi-turn loop antenna to resonate at a wireless charging frequency and provide wirelessly received power to the electronic device. The multi-turn loop antenna is configured for affixing to a housing of the wireless device.

Claims

1. A wireless charging receiver, comprising:

a first loop antenna having an energy receiving conductor and configured to resonate at a wireless charging frequency, the first loop antenna configured to transfer wirelessly received power to an electronic device, the first loop antenna being formed on or embedded in a housing of the electronic device, the first loop antenna comprising a first portion located on a first plane and a second portion extending from the first portion and located on a second plane different from the first plane; and

a second loop antenna having an energy receiving conductor electrically coupled to the first loop antenna to form a multi-loop antenna.

2. The receiver of claim 1, wherein the multi-loop antenna surrounds a majority portion of the housing.

3. The receiver of claim 1, wherein the multi-loop antenna occupies a space external to an electronic circuit of the electronic device.

4. The receiver of claim 1, wherein the multi-loop antenna comprises a multi-turn printed antenna integrated with the housing.

5. The receiver of claim 4, wherein the multi-turn printed antenna is integrated with a surface of the housing, and wherein the multi-turn printed antenna surrounds a majority portion of the surface.

6. The receiver of claim 1, wherein the multi-loop antenna comprises reactive components a portion of which is configured to switchably vary.

7. The receiver of claim 1, wherein the first loop antenna further comprises a third portion extending from the first portion and located on a third plane different from the first plane.

8. An apparatus, comprising:

an electronic circuit in a housing of a device configured to perform an electronic function of the device; and

a wireless charging receiver coupled to the electronic circuit and configured to transfer wirelessly received power to the electronic circuit, the wireless charging receiver including;

a first loop antenna having an energy receiving conductor and configured to resonate at a wireless charging frequency, the first loop antenna being formed on or embedded in the housing of the device, the first loop antenna comprising a first portion located on a first plane and a second portion extending from the first portion and located on a second plane different from the first plane; and

a second loop antenna having an energy receiving conductor electrically coupled to the first loop antenna to form a multi-loop antenna.

9. The apparatus of claim 8, wherein the number of turns of the multi-turn loop antenna is determined based on the diameter of the first loop antenna.

10. The apparatus of claim 8, wherein the multi-loop antenna surrounds a majority portion of the housing.

11. The apparatus of claim 8, wherein the multi-loop antenna occupies a space external to the electronic circuit of the device.

12. The apparatus of claim 8, wherein the multi-loop antenna comprises a multi-turn printed antenna.

13. The apparatus of claim 12, wherein the multi-turn printed antenna is formed on a surface of the housing and surrounds a majority portion of the surface.

14. The apparatus of claim 8, wherein the multi-loop antenna comprises reactive components a portion of which is configured to switchably vary.

15. The apparatus of claim 8, wherein the first loop antenna further comprises a third portion extending from the first portion and located on a third plane different from the first plane.

16. A wireless device, comprising:

a housing;

an electronic circuit enclosed within the housing; and

wireless charging circuitry configured to transfer power to the electronic circuit, the wireless charging circuitry comprising;

a multi-turn loop antenna configured to resonate in a charging region of a resonating transmitter and to receive power therefrom, the multi-turn loop antenna formed on or embedded in the housing, the multi-turn loop antenna comprising a first portion located on a first plane and a second portion extending from the first portion and located on a second plane different from the first plane.

17. The wireless device of claim 16, wherein the multi-turn loop antenna surrounds a majority portion of the housing.

18. The wireless device of claim 16, wherein the multi-turn loop antenna is embedded into an external surface of the housing.

19. The wireless device of claim 16, wherein the multi-turn loop antenna further comprises a third portion extending from the first portion and located on a third plane different from the first plane.

20. A method of receiving power via a wireless field, the method comprising:

resonating a first loop antenna having an energy receiving conductor at a wireless charging frequency, the first loop antenna configured to receive power via the wireless field; and

transferring the received power to an electronic device, the first loop antenna being formed on or embedded in a housing of the electronic device, the first loop antenna comprising a first portion located on a first plane and a second portion extending from the first portion and located on a second plane different from the first plane, the first loop antenna and a second loop antenna configured to form a multi-loop antenna, the second loop antenna having an energy receiving conductor electrically coupled to the first loop antenna.

21. The method of claim 20, wherein the first loop antenna further comprises a third portion extending from the first portion and located on a third plane different from the first plane.

22. An apparatus for receiving power via a wireless field, the apparatus comprising:

first means for resonating at a wireless charging frequency, the first resonating means having an energy receiving conductor and being configured to receive power via the wireless field, the first resonating means comprising a first portion located on a first plane and a second portion extending from the first portion and located on a second plane different from the first plane;

means for transferring the received power to an electronic device, the first resonating means being formed on or embedded in a housing of the electronic device; and

second means for resonating having an energy receiving conductor electrically coupled to the first resonating means to form a multi-loop antenna.

23. The apparatus of claim 22, wherein the first resonating means further comprises a third portion extending from the first portion and located on a third plane different from the first plane.