RADIO FREQUENCY IDENTIFICATION TAG

• US 20110168787A1
• Filed: 01/05/2011
• Published: 07/14/2011
• Est. Priority Date: 01/08/2010
• Status: Active Grant

• Current Assignee: LS Industrial Systems Company Limited
• Original Assignee: LS Industrial Systems Company Limited
• Inventors: CHOO, Jae Yul, Ryoo, Jeong Ki, Hong, Jin Kuk
• Granted Patent: US 8,537,069 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• 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 printing on an upper surface of the 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.

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 include:

a second dielectric substrate; and

parasitic metal layers formed in a predetermined interval at upper surface left/right both sides of the second dielectric substrate.

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

a first feeding loop pattern horizontally formed at left/right both sides of the tag chip;

a second feeding loop pattern upwardly curved at an end part of the first feeding loop pattern; and

a third feeding loop pattern horizontally curved at an upper-side end part of the second feeding loop pattern, and electrically connected to the radiation pattern placed in both end parts of the left/right sides of the cross (+) type slot.

5. The RFID tag of claim 4, wherein the plurality of second connection patterns connects the third feeding loop pattern to the radiation pattern.

6. An RFID tag, comprising:

a first dielectric substrate;

a radiation pattern printing on an upper surface of the first dielectric substrate;

a T type slot formed towards a lower part, a left-side and a right-side on the basis of a center of the radiation pattern;

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

a feeding loop pattern electrically connecting the tag chip with the radiation pattern; and

a plurality of second connection patterns connecting the radiation pattern at an end part of the feeding loop pattern.

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

8. The RFID tag of claim 7, wherein the gap materials include:

a second dielectric substrate; and

parasitic metal layers formed in a predetermined interval at upper surface left/right both sides of the second dielectric substrate.

9. The RFID tag of claim 6, wherein the feeding loop pattern (150) includes:

a first feeding loop pattern horizontally formed at left/right both sides of the tag chip;

a second feeding loop pattern upwardly curved at an end part of the first feeding loop pattern; and

a third feeding loop pattern horizontally curved at an upper-side end part of the second feeding loop pattern, and electrically connected to the radiation pattern placed in both end parts of the left/right sides of the T type slot.

10. The RFID tag of claim 9, wherein the plurality of second connection patterns connects the third feeding loop pattern to the radiation pattern.