Systems and methods for improving performance of RFID tags

• US 10,387,763 B2
• Filed: 12/01/2017
• Issued: 08/20/2019
• Est. Priority Date: 12/01/2016
• Status: Active Grant

• Current Assignee: Avery Dennison Retail Information Services LLC (Avery Dennison Corporation)
• Original Assignee: Avery Dennison Retail Information Services LLC (Avery Dennison Corporation)
• Inventors: Forster, Ian J.
• Primary Examiner(s): Lee, Seung H
• Application Number:
  US15/828,584
• Publication Number:
  US 20180157953A1
• Time in Patent Office: 627 Days
• Field of Search: 235492
• CPC Class Codes: G06K 19/0726 the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• CPC Class Codes: G06K 19/07773 Antenna details antennas for wireless devices, e.g. RFID tags, in general H01Q1/22

Abstract

Disclosed herein are RFID tags. In one exemplary embodiment, the RFID tag includes an RFID chip; a first antenna segment secured to the RFID chip; a second antenna segment secured to the RFID chip; and a wire segment secured on a first end to the first antenna segment and secured on a second end to the second antenna segment. Generally, the wire segment spans a mounting position of the RFID chip. In one embodiment, the wire segment is secured to the first antenna segment and the second antenna segment with ohmic contacts. The ohmic contacts can be formed by a conductive adhesive, soldering, or welding. In another embodiment, the RFID tag further includes a first non-conductive material positioned between the first end of the wire segment and the first antenna segment, and a second non-conductive material positioned between the second end of the wire segment and the second antenna segment.

Claims

1. An RFID tag comprising:

an RFID chip;

a first antenna segment secured to the RFID chip;

a second antenna segment secured to the RFID chip; and

a wire segment secured on a first end to the first antenna segment and secured on a second end to the second antenna segment, wherein the first end of the wire segment is wrapped around the first antenna segment and second end of the wire is wrapped around the second antenna segment.

2. The RFID tag of claim 1, wherein the wire segment spans a mounting position of the RFID chip.

3. The RFID tag of claim 1, wherein the wire segment is secured to the first antenna segment and the second antenna segment with ohmic contacts.

4. The RFID tag of claim 3, wherein the ohmic contacts are formed by a conductive adhesive.

5. The RFID tag of claim 3, wherein the ohmic contacts are formed by solder.

6. The RFID tag of claim 3, wherein the ohmic contacts are formed by welding.

7. The RFID tag of claim 1, further comprising:

a first non-conductive material positioned between the first end of the wire segment and the first antenna segment; and

a second non-conductive material positioned between the second end of the wire segment and the second antenna segment.

8. The RFID tag of claim 1 further comprising a sleeve positioned over the RFID chip and a portion of the first and second antenna segments.

9. The RFID tag of claim 8, further comprising an adhesive positioned to fill an interior of the sleeve.

10. An RFID tag comprising:

an RFID chip;

a first antenna segment secured to the RFID chip;

a second antenna segment secured to the RFID chip; and

a tuning and matching element secured on a first end to the first antenna segment and secured on a second end to the second antenna segment, wherein the tuning and matching element includes

a first ring at the first end,

a second ring at the second end, and

a wire section connecting the first ring and the second ring.

11. The RFID tag of claim 10, wherein the tuning and matching element is secured to the first antenna segment by the first ring and secured to the second antenna segment by the second ring.

12. The RFID tag of claim 11, wherein the first ring is positioned around the first antenna segment and the second ring is positioned around the second segment.

13. The RFID tag of claim 10, wherein the wire section is generally a straight segment.

14. The RFID tag of claim 10, wherein the wire section is generally a spiral segment.

15. The RFID tag of claim 10, further comprising a sleeve positioned over the RFID chip and portions of the first antenna segment and the second antenna segment.

16. The RFID tag of claim 15, wherein the tuning and matching element is positioned within the sleeve.

17. The RFID tag of claim 16, further comprising an adhesive positioned to fill the sleeve.

18. The RFID tag of claim 16, wherein the adhesive secures the first and second antenna segments to the RFID chip.