WIRELESS FREQUENCY TAG AND METHOD FOR MANUFACTURING WIRELESS FREQUENCY TAG

• US 20100127085A1
• Filed: 01/27/2010
• Published: 05/27/2010
• Est. Priority Date: 08/13/2007
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kai, Manabu, Maniwa, Toru, Yamagajo, Takashi
• Granted Patent: US 8,172,149 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• 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 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 1/40 Radiating elements coated with or embedded in protective material
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: Y10T 29/49018 with other electrical component
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A wireless frequency tag includes a loop-shaped antenna pattern that is electrically connected to a chip connecting section, and a conducting member that electrically couples a part of the antenna pattern.

Claims

1. A wireless frequency tag comprising:

a chip connecting section that is to be connected to a chip;

a loop-shaped antenna pattern that is electrically connected to the chip connecting section; and

a conducting member that electrically couples a part of the antenna pattern.

2. The wireless frequency tag according to claim 1, wherein the conducting member is provided at locations symmetric with respect to the chip connecting section.

3. The wireless frequency tag according to claim 1, wherein the antenna pattern is provided on a surface of a dielectric member, and

the conducting member includes a through-hole that electrically couples the antenna patterns on each surface of the dielectric member through the inside of the dielectric member.

4. The wireless frequency tag according to claim 1, wherein the antenna pattern is provided on a surface of a dielectric member, and

the conducting member includes side conductors that couple the antenna patterns on each surface of the dielectric member through a side of the dielectric member.

5. The wireless frequency tag according to claim 3, wherein the area of the through-hole at the conductor portion is decreased as the radius of through-hole is increased.

6. The wireless frequency tag according to claim 5, wherein a conductor plating is provided on a part of the inner wall of the through-hole.

7. A method for manufacturing a wireless frequency tag, the method comprising:

forming a loop-shaped antenna pattern that is electrically connected to a chip connecting section to which a chip is to be connected; and

forming a conducting member that electrically couples a part of the antenna pattern.

8. The method for manufacturing a wireless frequency tag according to claim 7, wherein impedance matching with the chip is adjusted by changing a spacing between a plurality of conducting members.