Systems and methods for enhancing communication in a wireless communication system

• US 20070222603A1
• Filed: 03/20/2006
• Published: 09/27/2007
• Est. Priority Date: 03/20/2006
• Status: Abandoned Application

• Current Assignee: Macronix International Co., Ltd.
• Original Assignee: Macronix International Co., Ltd.
• Inventors: Lo, Ying-Che, Lai, Po-Chih, Shen, Chia-Jui, Lee, Kung-Hua, Luo, Huan-Chin
• Application Number:
  US11/384,738
• Publication Number:
  US 20070222603A1
• Time in Patent Office: Days
• US Class Current: 340/572.700
• 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

Abstract

An RFID system comprises an intermediate device that includes a first and second antenna coils connected together in a close loop format. The first coil can be optimized for communication with a reader, while the second coil can be optimized for communication with a tag. Thus, the dimension of the first antenna coil and the second antenna coil can be completely independent of each other. The intermediate device can be configured such that it can change the direction of the transmission from either the interrogator or the tag, thereby improving communication when the interrogator and tag are not inline.

Claims

1. A wireless communication system, comprising:

a first communication device;

a second communication device configured to communicate with the first communication device via wireless communication signals; and

an intermediate antenna interposed between the first and second communication devices, the intermediate antenna comprising a first coil configured for optimal coupling with the first communication device and a second coil configured for optimal coupling with the second communication device.

2. The wireless communication system of claim 1, wherein the first communication device is a reader and the second communication device is a tag.

3. The wireless communication system of claim 1, wherein the dimensions of the first coil are close to the dimensions of an antenna included in the first communication device.

4. The wireless communication system of claim 1, wherein the dimensions of the second coil are close to the dimensions of an antenna included in the second communication device.

5. The wireless communication device of claim 1, wherein the first and second coils are approximately the same shape.

6. The wireless communication system of claim 1, wherein the first and second coils are of different shapes.

7. The wireless communication system of claim 1, wherein the first and second coils are tuned to operate at approximately 125 KHz or 134.2 KHz.

8. The wireless communication system of claim 1, wherein the first and second coils are tuned to operate at approximately 13.56 MHz.

9. The wireless communication system of claim 1, wherein the first and second coils are tuned to operate in a UHF frequency band.

10. The wireless communication system of claim 1, wherein the first and second coils are tuned to operate in a microwave frequency band.

11. The wireless communication system of claim 1, wherein the first and second coils are configured to change the direction of communication between the first communication device and the second communication device.

12. The wireless communication device of claim 1, wherein the intermediate device is configured to increase the power in a wireless communication signal received by the second communication device.

21. The wireless communication device of claim 1, wherein the intermediate device is configured to increase the power in a wireless communication signal received by the tag.

13. An RFID system, comprising:

a reader;

a tag configured to communicate with the reader via wireless communication signals; and

an intermediate antenna interposed between the reader and the tag, the intermediate antenna comprising a first coil configured for optimal coupling with the reader and a second coil configured for optimal coupling with the tag, wherein the dimensions of the first coil are close to the dimensions of an antenna included in the reader, and wherein the dimensions of the second coil are close to the dimensions of an antenna included in the tag.

14. The wireless communication device of claim 13, wherein the first and second coils are approximately the same shape.

15. The wireless communication system of claim 13, wherein the first and second coils are of different shapes.

16. The wireless communication system of claim 13, wherein the first and second coils are tuned to operate at approximately 125 KHz or 134.2 KHz.

17. The wireless communication system of claim 13, wherein the first and second coils are tuned to operate at approximately 13.56 MHz.

18. The wireless communication system of claim 13, wherein the first and second coils are tuned to operate in a UHF frequency band.

19. The wireless communication system of claim 13, wherein the first and second coils are tuned to operate in a microwave frequency band.

20. The wireless communication system of claim 13, wherein the first and second coils are configured to change the direction of communication between the reader and the tag.