Radio frequency identification tag exciter/reader

• US 6,218,942 B1
• Filed: 09/11/1998
• Issued: 04/17/2001
• Est. Priority Date: 10/11/1995
• Status: Expired due to Fees

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Vega, Victor Allen, Kakkanad, Sebastian Thomas
• Primary Examiner(s): Lieu, Julie
• Application Number:
  US09/151,904
• Time in Patent Office: 949 Days
• Field of Search: 340/572.7, 340/572.1, 340/693.6, 340/693.5, 340/673, 340/676
• US Class Current: 340/572.1
• 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 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/07788 the antenna being of the capacitive type
• 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 7/10326 the antenna being of the very-near field type, e.g. capacitive
• CPC Class Codes: G06K 7/10425 the interrogation device being arranged for interrogation of record carriers passing by the interrogation device
• CPC Class Codes: G06K 7/10435 the interrogation device being positioned close to a conveyor belt or the like on which moving record carriers are passing conveying in accordance with bodily destination marks, see B65G47/46, sorting of objects carrying identity markings, see B07C5/34

Abstract

A radio frequency identification tag exciter/reader (10) is arranged for operation in association with an article transport device (100). The radio frequency identification tag exciter/reader (10) includes a canopy assembly (12) into which an exciter antenna (22) and a reader antenna (24) are positioned. A base station (26) is further provided and is coupled to the exciter antenna (22) and the reader antenna (24). The base station (26) provides an excitation signal (36) and receives a read signal (38). The base station further communicates with a system element (34). A hand held radio frequency identification tag exciter/reader (900) includes a hand holdable housing (912) including an exciter antenna (922) and a reader antenna (924). The housing is coupled to a portable base station (926). The base station (926) provides an excitation signal (936) and receives a read signal (938). The base station further communicates with a system element (934) via radio signals (932, 933).

Claims

1. A radio frequency identification tag exciter/reader comprising:

a canopy assembly disposed above an article transport device, the article transport device being arranged to couple to ground;

an exciter antenna secured to the canopy assembly;

a reader antenna secured to the canopy assembly; and

a base station, the exciter antenna and the reader antenna coupled to the base station and the base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

2. The radio frequency identification tag exciter/reader of claim 1, the base station arranged to generate a write signal and to couple the write signal to the exciter antenna.

3. The radio frequency identification tag exciter/reader of claim 1, the base station further coupled to a system element.

4. The radio frequency identification tag exciter/reader of claim 3, the system element comprising one of an article sorting system, an inventory tracking system and a manufacturing system.

5. The radio frequency identification tag exciter/reader of claim 1, the canopy assembly comprising a first vertical support member, a second vertical support member and a canopy member.

6. The radio frequency identification tag exciter/reader of claim 5, the exciter antenna and the reader antenna secured to the canopy member.

7. The radio frequency identification tag exciter/reader of claim 5, the exciter antenna secured to one of the first vertical support member and the second vertical support member.

8. The radio frequency identification tag exciter/reader of claim 5, the reader antenna secured to one of the first vertical support member and the second vertical support member.

9. A radio frequency identification tag exciter/reader comprising:

a canopy assembly disposed above an article transport device, the canopy assembly comprising a first vertical support member, a second vertical support member and a canopy member;

an exciter antenna secured to the canopy assembly;

a reader antenna secured to the canopy assembly, the reader antenna comprising a first reader antenna and a second reader antenna, the first reader antenna secured to the first vertical support member and the second reader antenna secured to the second vertical support member; and

a base station, the exciter antenna and the reader antenna coupled to the base station and the base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

10. A radio frequency identification tag exciter/reader comprising:

a canopy assembly disposed above an article transport device, the canopy assembly comprising a first vertical support member, a second vertical support member and a canopy member;

an exciter antenna, the exciter antenna comprising a first exciter antenna and a second exciter antenna, the first exciter antenna and the second exciter antenna secured to the canopy member;

a reader antenna secured to the canopy assembly; and

a base station, the exciter antenna and the reader antenna coupled to the base station and the base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

11. A radio frequency identification tag exciter/reader comprising:

a canopy assembly disposed above an article transport device, the canopy assembly comprising a first vertical support member, a second vertical support member and a canopy member;

an exciter antenna secured to the canopy assembly, the exciter antenna comprising a first exciter antenna and a second exciter antenna, the first exciter antenna secured to the first vertical support member and the second exciter antenna secured to the second vertical support member;

a reader antenna secured to the canopy assembly; and

a base station, the exciter antenna and the reader antenna coupled to the base station and the base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

12. A radio frequency identification tag exciter/reader comprising:

a canopy assembly disposed above an article transport device;

a first exciter antenna and a second exciter antenna secured to the canopy assembly;

a reader antenna secured to the canopy assembly; and

a base station, the first exciter antenna, the second exciter antenna and the reader antenna coupled to the base station and the base station arranged to generate a first exciter signal and to couple the first exciter signal to the first exciter antenna, to generate a second exciter signal and to couple the second exciter signal to the second exciter antenna and to receive from the reader antenna a read signal.

13. The radio frequency identification tag exciter/reader of claim 12, the base station arranged to generate a write signal and to couple the write signal to one of the first exciter antenna and the second exciter antenna.

14. The radio frequency identification tag exciter/reader of claim 12, the base station further coupled to a system element.

15. The radio frequency identification tag exciter/reader of claim 14, the system element comprising one of an article sorting system, an inventory tracking system and a manufacturing system.

16. The radio frequency identification tag exciter/reader of claim 12, the canopy assembly comprising a first vertical support member, a second vertical support member and a canopy member.

17. The radio frequency identification tag exciter/reader of claim 16, the first exciter antenna, the second exciter antenna and the reader antenna secured to the canopy member.

18. The radio frequency identification tag exciter/reader of claim 16, the first exciter antenna secured to the first vertical support member and the second exciter antenna secured to the second vertical support member.

19. The radio frequency identification tag exciter/reader of claim 16, the reader antenna secured to one of the first vertical support member and the second vertical support member.

20. A radio frequency identification tag exciter/reader comprising:

a housing disposed adjacent an article transport device, the article transport device being arranged to couple to ground;

an exciter antenna secured to the housing;

a reader antenna secured to the housing; and

a base station, the exciter antenna and the reader antenna coupled to the base station and the base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

21. The radio frequency identification tag exciter/reader of claim 20, the base station arranged to generate a write signal and to couple the write signal to the exciter antenna.

22. The radio frequency identification tag exciter/reader of claim 20, the base station further coupled to a system element.

23. The radio frequency identification tag exciter/reader of claim 22, the system element comprising one of an article sorting system, an inventory tracking system and a manufacturing system.

24. A radio frequency identification tag exciter/reader comprising:

a housing disposed adjacent an article transport device;

an exciter antenna secured to the housing, the exciter antenna comprising a first exciter antenna and a second exciter antenna;

a reader antenna secured to the housing; and

a base station, the exciter antenna and the reader antenna coupled to the base station and the base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

25. A radio frequency identification tag exciter/reader comprising:

a housing the housing including an antenna head and a grip portion and the housing arranged to couple to ground;

an exciter antenna secured to the antenna head;

a reader antenna secured to the antenna head; and

a portable base station, the exciter antenna and the reader antenna coupled to the portable base station and the portable base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

26. The radio frequency identification tag exciter/reader of claim 25, the housing arranged to couple to ground through a user'"'"'s body.

27. The radio frequency identification tag exciter/reader of claim 25, the portable base station arranged to generate a write signal and to couple the write signal to the exciter antenna.

28. The radio frequency identification tag exciter/reader of claim 25, the portable base station further coupled to a system element.

29. The radio frequency identification tag exciter/reader of claim 28, the system element comprising one of an article sorting system, an inventory tracking system and a manufacturing system.

30. The radio frequency identification tag exciter/reader of claim 25, the grip portion including a trigger button, and the portable base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal in response to selective actuation of the trigger button.

31. A radio frequency identification tag exciter/reader comprising:

a housing, the housing including an antenna head and a grip portion;

an exciter antenna secured to the antenna head;

a reader antenna secured to the antenna head; and

a portable base station, the exciter antenna, the reader antenna and a system element coupled to the portable base station and the portable base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal, wherein the portable base station is coupled to the system element by radio signals.

32. A radio frequency identification tag exciter/reader comprising:

a housing, the housing including an antenna head and a grip portion;

an exciter antenna secured to the antenna head, the exciter antenna comprising a first exciter antenna and a second exciter antenna;

a reader antenna secured to the antenna head; and

a portable base station, the exciter antenna and the reader antenna coupled to the portable base station and the portable base station arranged to generate an exciter signal and to couple the exciter signal to the exciter antenna and to receive from the reader antenna a read signal.

33. A portable radio frequency identification tag exciter/reader comprising:

a housing containing a portable base station including an exciter signal generator and a reader, a power source coupled to the portable base station, an exciter antenna coupled to the exciter signal generator and a reader antenna coupled to the reader, the exciter antenna arranged as a monopole antenna and the portable radio frequency identification tag exciter/reader arranged for coupling to ground;

an on/off switch to activate the portable base station;

a power-on light emitting diode indicating power on operation; and

a read verification light emitting diode responsive to a read signal from a radio frequency identification tag.

34. The portable radio frequency identification tag exciter/reader of claim 33, further comprising an interface, the interface arranged to couple the portable radio frequency identification tag exciter/reader to a system element.

35. The portable radio frequency identification tag exciter/reader of claim 33, the interface comprising one of a cable link and a radio link.

36. The portable radio frequency identification tag exciter/reader of claim 33 arranged for coupling to ground through a user'"'"'s body.

37. A portable radio frequency identification tag exciter/reader comprising:

a housing containing a portable base station including an exciter signal generator and a reader, a power source coupled to the portable base station, an first exciter antenna and a second exciter antenna each coupled to the exciter signal generator and a reader antenna coupled to the reader, the first exciter antenna and the second exciter antenna arranged as a dipole antenna;

an on/off switch to activate the portable base station;

a power-on light emitting diode indicating power on operation; and

a read verification light emitting diode confirming receipt of a read signal from a radio frequency identification tag.

38. The portable radio frequency identification tag exciter/reader of claim 37, further comprising an interface, the interface arranged to couple the portable radio frequency identification tag exciter/reader to a system element.

39. The portable radio frequency identification tag exciter/reader of claim 37, the interface comprising one of a cable link and a radio link.