Wireless device with shared coil

• US 10,608,339 B2
• Filed: 05/25/2017
• Issued: 03/31/2020
• Est. Priority Date: 11/16/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Jaechun, Kim, Jong Pal, Hong, Young-Jun, Kang, Joonseong, Suh, Junyeub, Lee, Wonseok
• Primary Examiner(s): Mancuso, Huedung X
• Application Number:
  US15/605,122
• Publication Number:
  US 20180138596A1
• Time in Patent Office: 1,041 Days
• Field of Search: 343867
• 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 1/1242 Rigid masts specially adapted for supporting an aerial
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use
• CPC Class Codes: H01Q 5/335 at the feed, e.g. for impedance matching
• 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 50/10 using inductive coupling
• 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: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless device including a coil having loops, a first reception circuit, and a second reception circuit. The first reception circuit is configured to receive a signal of a first frequency band through a portion of the loops and the second reception circuit configured to inhibit the signal of the first frequency band through the loops.

Claims

1. A wireless device, comprising:

a coil comprising a plurality of loops;

a first reception circuit configured to receive a signal of a first frequency band through a portion of the plurality of loops;

a second reception circuit configured to inhibit the signal of the first frequency band through the plurality of loops; and

a portion of the coil is disposed to receive magnetic flux of a first direction, and a remaining portion of the coil is disposed to receive magnetic flux of a second direction that is orthogonal to the first direction.

2. The wireless device of claim 1, wherein the first reception circuit and the second reception circuit are connected to the coil to share at least a portion of the coil.

3. The wireless device of claim 1, wherein the second reception circuit is configured to receive a signal of a second frequency band, the second frequency band being lower than the first frequency band.

4. The wireless device of claim 1, wherein the first reception circuit is configured to inhibit a signal of a second frequency band, the second frequency band being lower than the first frequency band.

5. The wireless device of claim 1, wherein the coil comprises a first loop configured to receive the magnetic flux of the first direction and a second loop configured to receive the magnetic flux of the second direction, and

the second reception circuit is configured to inhibit the signal of the first frequency band from an external signal received through the coil, using the second loop.

6. The wireless device of claim 1, wherein the first reception circuit comprises a band-stop filter (BSF) configured to prevent an inflow of wireless power into the first reception circuit, the power transmitted through the second frequency band, by blocking a signal of a second frequency band which is distinct from the first frequency band.

7. The wireless device of claim 1, wherein the second reception circuit comprises a band-stop filter (BSF) configured to prevent an inflow of wireless data having a frequency in the first frequency band from flowing into the second reception circuit by inhibiting frequencies of the first frequency band.

8. The wireless device of claim 1, wherein the second reception circuit is configured to prevent current flow corresponding to the signal of the first frequency band, and to pass current flow corresponding to a signal of a second frequency band which is distinct from the first frequency band.

9. The wireless device of claim 1, wherein the first reception circuit is configured to pass current flow corresponding to the signal of the first frequency band, and prevent current flow corresponding to a signal of a second frequency band which is distinct from the first frequency band.

10. The wireless device of claim 1, wherein the second reception circuit comprises a circuit configured to operate as an impedance value greater than a threshold impedance value in response to reception of the signal of the first frequency band, and operate as an impedance value less than or equal to the threshold impedance in response to reception of a signal distinct from the first frequency band.

11. The wireless device of claim 1, wherein the second reception circuit comprises a resonant circuit having a center frequency of the first frequency band as a resonant frequency.

12. The wireless device of claim 1, wherein the second reception circuit comprises:

a conducting wire having a length equal to a quarter-wavelength of a center frequency of the first frequency band, and connected to the plurality of loops; and

a capacitor connected between the conducting wire and a ground.

13. The wireless device of claim 1, wherein the coil comprises a conducting wire having a length equal to a quarter-wavelength of a center frequency of the first frequency band.

14. The wireless device of claim 1, wherein a first portion and a second portion of the coil connected to the second reception circuit are disposed to be electrically symmetric about the first reception circuit, and

a third portion of the coil connected to the first reception circuit is disposed at an electrical center of the coil.

15. The wireless device of claim 1, wherein the first reception circuit is connected to a portion of the plurality of loops electrically symmetric about a virtual ground of the coil, and

the second reception circuit comprises a capacitor configured to connect two points electrically symmetric about the virtual ground of the coil.

16. The wireless device of claim 1, wherein the first reception circuit is connected to a portion of the plurality of loops electrically symmetric about a virtual ground of the coil, and

the second reception circuit comprises a first capacitor connected in parallel with at least one loop of the coil, and a second capacitor connected in parallel with at least another loop of the coil such that the first capacitor and the second capacitor are electrically symmetric about the virtual ground.

17. The wireless device of claim 1, further comprising:

a third reception circuit configured to receive a signal of a third frequency band through the portion of the loops, the third frequency band being different from the first frequency band.

18. The wireless device of claim 1, wherein the first reception circuit is connected to the portion of the plurality of loops, and

the second reception circuit is connected to the coil to share at least another portion of the portion of the plurality of loops with the first reception circuit.

19. The wireless device of claim 1, wherein the portion of the coil is disposed on a first layer of a circuit board, and

the remaining portion of the coil is disposed on a second layer of the circuit board that is distinct from the first layer.

20. The wireless device of claim 19, wherein the second layer comprises a magnetic material that disrupts a flow of a magnetic flux.

21. The wireless device of claim 19, wherein the second layer is disposed between a third layer and the first layer to magnetically isolate the third layer and the first layer.

22. The wireless device of claim 1, wherein the portion of the coil is disposed to receive magnetic flux of a first direction and the remaining portion of the coil is disposed to receive magnetic flux of a second direction that is different from the first direction, and

the portion of the coil and the remaining portion of the coil are disposed horizontally on the same layer.

23. The mobile device of claim 1, wherein the second reception circuit has a relative minimum frequency response at the first frequency band.

24. The wireless device of claim 3, wherein the first reception circuit is further configured to isolate the signal of the second frequency band, and the second reception circuit is further configured to isolate the signal of the first frequency band.

25. A wireless device, comprising:

a coil comprising a plurality of loops; and

a plurality of reception circuits configured to receive external signals through the coil,

wherein each of the plurality of reception circuits is configured to receive a signal of a frequency band designated for each of the plurality of reception circuits, and to inhibit a signal of a non-designated frequency band using at least a portion of the plurality of loops, and

wherein a portion of the coil is disposed to receive magnetic flux of a first direction, and a remaining portion of the coil is disposed to receive magnetic flux of a second direction that is orthogonal to the first direction.

26. A wireless device, comprising:

a coil comprising a first loop and a second loop,

the first loop of the coil is coupled to a first reception circuit to receive a first set of frequencies of the frequency band,

the second loop of the coil is coupled to a second reception circuit to inhibit the first set of frequencies, and

wherein the second reception circuit is a resonant circuit, and

wherein the first loop is disposed to receive magnetic flux of a first direction, and the second loop is disposed to receive magnetic flux of a second director that is orthogonal to the first direction.

27. The wireless device of claim 26, wherein a third loop of the coil is coupled to a third reception circuit to receive a third set of frequencies of the frequency band.

28. The wireless device of claim 26, wherein the first loop is configured to receive wireless power and the second loop is configured as an RF antenna.

29. The wireless device of claim 28, wherein the wireless device is a mobile device.