Radio frequency identification tag

• US 8,537,069 B2
• Filed: 01/05/2011
• Issued: 09/17/2013
• Est. Priority Date: 01/08/2010
• Status: Expired due to Fees

• Current Assignee: LS Industrial Systems Company Limited
• Original Assignee: LS Industrial Systems Company Limited
• Inventors: Choo, Jae Yul, Ryoo, Jeong Ki, Hong, Jin Kuk
• Primary Examiner(s): MANCUSO, HUEDUNG XUAN CAO
• Application Number:
  US12/985,284
• Publication Number:
  US 20110168787A1
• Time in Patent Office: 986 Days
• Field of Search: 340/572.7, 343/795, 343/700.MS
• US Class Current: 343/795
• CPC Class Codes: G06K 19/07735 the record carrier comprising means for protecting against electrostatic discharge
• 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 19/07786 the antenna being of the HF type, such as a dipole
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• CPC Class Codes: H01Q 9/26 with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength resonant loop antennas H01Q7/00
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407

Abstract

An RFID tag is disclosed, wherein the RFID tag includes a radiation pattern printing on an upper surface of a first dielectric substrate, a cross (+) type slot formed towards an upper part, a lower part, a left-side and a right-side on the basis of a center of the radiation pattern to divide a left-side radiation pattern and a right-side radiation pattern, a plurality of first connection patterns formed inside the upper part of the cross (+) type slot, connecting the left-side radiation pattern with the right-side radiation pattern, a tag chip settled inside the lower part of the cross (+) type slot, a feeding loop pattern electrically connecting the tag chip and the left-side radiation pattern, and the right-side radiation pattern, and a plurality of second connection patterns connecting the left-side radiation pattern and the right-side radiation pattern at an end part of the feeding loop pattern.

Claims

1. An RFID tag, comprising:

a first dielectric substrate;

a radiation pattern printed on the first dielectric substrate, the radiation pattern including a first radiation pattern and a second radiation pattern;

a cross (+) type slot formed at a center of the first and the second radiation patterns;

a plurality of first connection patterns printed on an upper part of the cross (+) type slot and configured to directly connect the first and the second radiation patterns;

a tag chip in a lower part of the cross (+) type slot;

a feeding loop pattern configured to directly connect the tag chip and the radiation pattern; and

a plurality of second connection patterns configured to connect the feeding loop pattern and the first and the second radiation patterns.

2. The RFID tag of claim 1, wherein gap materials are stacked at a lower part of the first dielectric substrate.

3. The RFID tag of claim 2, wherein the gap materials comprise:

a second dielectric substrate; and

a first and a second parasitic metal layers on the second dielectric substrate, the first and the second parasitic metal layers formed in a predetermined interval.

4. The RFID tag of claim 1, wherein the feeding loop pattern includes:

first feeding loop patterns horizontally formed at left and right sides of the tag chip;

second feeding loop patterns upwardly curved at an each end of the first feeding loop patterns; and

third feeding loop patterns horizontally curved at an each end of the second feeding loop patterns, and electrically connected to the first and the second radiation patterns by the plurality of the second connection patters.

5. An RFID tag, comprising:

a first dielectric substrate;

a radiation pattern printed on the first dielectric substrate, the radiation pattern including a first radiation pattern and a second radiation pattern;

a T type slot formed towards a center of the first and the second radiation patterns;

a tag chip settled in a lower part of the T type slot;

a plurality of first connection patterns printed on an upper part of the T type slot and configured to directly connect the first and the second radiation patterns;

a feeding loop pattern configured to directly connect the tag chip and the radiation pattern; and

a plurality of second connection patterns configured to connect the feeding loop pattern and the radiation pattern at an end of the feeding loop pattern.

6. The RFID tag of claim 5, wherein gap materials are stacked at a lower part of the first dielectric substrate.

7. The RFID tag of claim 6, wherein the gap materials comprise:

a second dielectric substrate; and

a first and a second parasitic metal layers on the second dielectric substrate, the first and the second parasitic metal layers formed in a predetermined interval.

8. The RFID tag of claim 5, wherein the feeding loop pattern (150) includes:

first feeding loop patterns horizontally formed at left and right sides of the tag chip;

second feeding loop patterns upwardly curved at an each end of the first feeding loop patterns; and

third feeding loop patterns horizontally curved at an each end of the second feeding loop patterns, and electrically connected to the radiation pattern by the plurality of the second connection patterns.