Wireless communications including an antenna for wireless power transmission and data communication and associated methods

• US 8,144,066 B2
• Filed: 02/26/2009
• Issued: 03/27/2012
• Est. Priority Date: 02/26/2009
• Status: Active Grant

• Current Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: PARSCHE, Francis Eugene
• Primary Examiner(s): Wimer, Michael C
• Application Number:
  US12/393,249
• Publication Number:
  US 20100214177A1
• Time in Patent Office: 1,125 Days
• Field of Search: 343/743, 343/741, 343/895, 343/702, 343/866, 343/867, 343/742, 343/870, 343/788, 343/757, 343/763, 343/764, 343/748, 343/744, 343/842, 340/572.7
• US Class Current: 343/742
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• 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

Abstract

The wireless communication system includes a first device, e.g. a radio frequency identification (RFID) reader, having a wireless power transmitter, a first wireless data communications unit, and a first dual polarized loop antenna having isolated signal feedpoints along a first loop electrical conductor. The wireless power transmitter transmits a power signal having a first polarization, and the first wireless data communications unit communicates using a data signal having a second polarization. A second device, e.g. an RFID tag, includes a second dual polarized loop antenna. A second wireless data communications unit communicates with the first wireless data communications unit of the first device using the data signal having the second polarization. A wireless power receiver receives the power signal having the first polarization from the wireless power transmitter of the first device, and provides power for the second device.

Claims

1. A wireless communication system for data communication and power transmission, the system comprising:

a first device including

a wireless power transmitter,

a first wireless data communications unit, and

a first dual polarized loop antenna comprising a first loop electrical conductor and first and second isolated signal feedpoints along the first loop electrical conductor and separated by one quarter of a length of the first loop electrical conductor,

the wireless power transmitter being coupled to the first isolated signal feedpoint to transmit a power signal having a first polarization, and the wireless data communications unit being coupled to the second isolated signal feedpoint to communicate using a data signal having a second polarization; and

a second device for communications with the first device and including

a second dual polarized loop antenna comprising a second loop electrical conductor and first and second isolated signal feedpoints along the second loop electrical conductor and separated by one quarter of a length of the second loop electrical conductor,

a second wireless data communications unit coupled to the second isolated signal feedpoint of the second dual polarized loop antenna to communicate with the wireless data communications unit of the first device using the data signal having the second polarization, and

a wireless power receiver coupled to the first isolated signal feedpoint of the second dual polarized loop antenna to receive the power signal having the first polarization from the wireless power transmitter of the first device, and to provide power for the second device.

2. The wireless communication system according to claim 1, wherein the first and second dual polarized loop antennas provide for simultaneous data communication and power transmission between the first and second devices.

3. The wireless communication system according to claim 1, wherein the first and second isolated signal feedpoints along the loop electrical conductor of each of the first and second dual polarized loop antennas are operated at a signal feedpoint phase angle input difference of 0 degrees.

4. The wireless communication system according to claim 1, wherein each of the first and second isolated signal feedpoints of each of the first and second dual polarized loop antennas defines a discontinuity in the respective first and second loop electrical conductors.

5. The wireless communication system according to claim 1, wherein each of the first and second loop electrical conductors comprises a circular electrical conductor.

6. The wireless communication system according to claim 1, wherein each of the first and second dual polarized loop antennas comprises a dual linearly polarized loop antenna.

7. The wireless communication system according to claim 1, wherein the first device defines a radio frequency identification (RFID) reader, and the second device defines an RFID tag.

8. A wireless communication device for data communication and power transmission, the device comprising:

a wireless power transmitter;

a wireless data communications unit; and

a dual polarized loop antenna comprising a loop electrical conductor and first and second isolated signal feedpoints along the loop electrical conductor and separated by one quarter of a length of the loop electrical conductor;

the wireless power transmitter being coupled to the first isolated signal feedpoint to transmit a power signal having a first polarization, and the wireless data communications unit being coupled to the second isolated signal feedpoint to communicate using a data signal having a second polarization.

9. The wireless communication device according to claim 8, wherein the dual polarized loop antenna provides for simultaneous data communication and power transmission.

10. The wireless communication device according to claim 8, wherein each of the first and second isolated signal feedpoints of the dual polarized loop antenna defines a discontinuity in the loop electrical conductor.

11. The wireless communication device according to claim 8, wherein the loop electrical conductor comprises a circular electrical conductor.

12. The wireless communication device according to claim 8, wherein the device defines a radio frequency identification (RFID) reader.

13. A wireless communication device for data communication and power reception, the device comprising:

a dual polarized loop antenna comprising a loop electrical conductor and first and second isolated signal feedpoints along the loop electrical conductor and separated by one quarter of a length of the loop electrical conductor;

a wireless power receiver coupled to the first isolated signal feedpoint of the dual polarized loop antenna to receive a power signal having a first polarization, and to provide power for the device; and

a wireless data communications unit coupled to the second isolated signal feedpoint of the dual polarized loop antenna to communicate using a data signal having a second polarization.

14. The wireless communication device according to claim 13, wherein the dual polarized loop antenna provides for simultaneous data communication and power transmission.

15. The wireless communication device according to claim 13, wherein each of the first and second isolated signal feedpoints of the dual polarized loop antenna defines a discontinuity in the loop electrical conductor.

16. The wireless communication device according to claim 13, wherein the loop electrical conductor comprises a circular electrical conductor.

17. The wireless communication device according to claim 13, wherein the device defines a radio frequency identification (RFID) tag.

18. A method for data communication and power transmission between first and second wireless communication devices, the method comprising:

operating the first device including a wireless power transmitter, a first wireless data communications unit, and a first dual polarized loop antenna comprising a loop electrical conductor and first and second isolated signal feedpoints along the loop electrical conductor and separated by one quarter of a length of the loop electrical conductor, the wireless power transmitter being coupled to the first isolated signal feedpoint and transmitting a power signal having a first polarization, and the wireless data communications unit being coupled to the second isolated signal feedpoint and communicating using a data signal having a second polarization; and

operating the second device including a second dual polarized loop antenna comprising a loop electrical conductor and first and second isolated signal feedpoints along the loop electrical conductor and separated by one quarter of a length of the loop electrical conductor, a second wireless data communications unit coupled to the second isolated signal feedpoint of the second dual polarized loop antenna and communicating with the wireless data communications unit of the first device using the data signal having the second polarization, and a wireless power receiver coupled to the first isolated signal feedpoint of the second dual polarized loop antenna and receiving the power signal having the first polarization from the wireless power transmitter of the first device, and providing power for the second device.

19. The method according to claim 18, wherein data communication and power transmission is simultaneous.

20. The method according to claim 18, further comprising operating the first and second isolated signal feedpoints along the loop electrical conductor of each of the first and second dual polarized loop antennas at a signal feedpoint phase angle input difference of 0 degrees.

21. The method according to claim 18, wherein operating the first device is for a radio frequency identification (RFID) reader function;

and wherein operating the second device comprises is for an RFID tag function.