System and method for using a single antenna for active and passive radio functions

• US 8,170,485 B2
• Filed: 06/23/2011
• Issued: 05/01/2012
• Est. Priority Date: 12/19/2006
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Hulvey, Robert William
• Primary Examiner(s): NGUYEN, TUAN HOANG
• Application Number:
  US13/167,513
• Publication Number:
  US 20110250841A1
• Time in Patent Office: 313 Days
• Field of Search: 455/39, 455/41.1, 455/41.2, 340/572.7
• US Class Current: 455/41.2
• CPC Class Codes: H04B 5/77 for interrogation
• CPC Class Codes: H04W 52/287 when the channel is in stand-by

Abstract

A system and method for using a single antenna for active and passive radio functions. A wireless communication device includes a passive component that can be read using an antenna when the wireless communication device is in a low power sleep mode. When it is determined that a higher capacity is needed, the wireless communication device activates an active component. Activation of the active component includes a switching of a connection of the antenna from the passive component to the active component.

Claims

1. A wireless communication method, comprising:

after configuration information is read from a passive component in a wireless communication device, switching a connection of an antenna from said passive component to an active component, said switching being responsive to a determination that a capacity of said active component is needed; and

transmitting by said active component to a reader device, wherein communication between said active component and said reader device is enabled by said configuration information that is read from said passive component.

2. The method of claim 1, wherein said passive component is a passive radio frequency identification tag.

3. The method of claim 1, wherein said active component is a Bluetooth module.

4. The method of claim 1, wherein said active component is a Wi-Fi module.

5. The method of claim 1, wherein said active component is a near field communication module.

6. The method of claim 1, wherein said determination is based on whether higher storage capacity is needed.

7. The method of claim 1, wherein said determination is based on whether higher transmission capacity is needed.

8. The method of claim 1, wherein said switching comprises removing a connection between said antenna and said passive component.

9. The method of claim 1, wherein said passive component is coupled to said antenna when said wireless communication device is in a low power sleep mode.

10. A wireless communication device, comprising:

an antenna;

an unpowered passive component that is coupled to said antenna, said passive component being read as part of a first phase of an interaction with the wireless communication device, said first phase of said interaction including a passage of facilitating information; and

a powered active component that is selectively coupled to said antenna during a second phase of said interaction with the wireless communication device, said second phase of said interaction with the wireless communication device being dependent on said passage of facilitating information.

11. The wireless communication device of claim 10, further comprising a switch that selectively couples said antenna to said unpowered passive component or said powered active component.

12. The wireless communication device of claim 10, wherein said unpowered passive component is a passive radio frequency identification tag.

13. The wireless communication device of claim 10, wherein said powered active component is a Bluetooth module.

14. The wireless communication device of claim 10, wherein said powered active component is a Wi-Fi module.

15. The wireless communication device of claim 10, wherein said powered active component is a near field communication module.

16. The wireless communication device of claim 10, wherein said unpowered passive component is coupled to said antenna when said wireless communication device is in a low power sleep mode.

17. The wireless communication device of claim 10, wherein said capacity of said powered active component is storage capacity.

18. The wireless communication device of claim 10, wherein said capacity of said powered active component is transmission capacity.

19. A wireless communication method, comprising:

transmitting, by a passive component in a wireless communication device, using an antenna, wherein said antenna is coupled to said passive component using a switch element;

determining whether a capacity of an active component in said wireless communication device is needed;

switching a connection of said antenna to said active component when it is determined that said capacity of said active component is needed; and

transmitting, by said active component, using said antenna.

20. The method of claim 19, wherein said passive component is a passive radio frequency identification tag.