Antenna unit and noncontact IC tag

• US 20070069037A1
• Filed: 08/10/2006
• Published: 03/29/2007
• Est. Priority Date: 09/29/2005
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: Kawai, Wakahiro
• Granted Patent: US 7,963,451 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: H01L 2224/16 of an individual bump connector
• CPC Class Codes: H01L 2924/3011 Impedance
• 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 13/085 Slot-line radiating ends
• CPC Class Codes: H01Q 13/10 Resonant slot antennas

Abstract

An antenna unit by which a noncontact IC tag having different resonance frequencies can be easily manufactured, and the noncontact IC tag are provided. An antenna unit has an impedance matching wiring portion and an antenna, in which when an IC chip is electrically connected to the impedance matching wiring portion and the antenna, a noncontact IC tag is formed; wherein connectable regions are provided in the impedance matching wiring portion, the regions making a direct or indirect connecting position of the IC chip to be adjustable within a predetermined range, so that effective partial length for impedance matching is made adjustable.

Claims

1. An antenna unit comprising an antenna and an impedance matching wiring portion, in which when an IC chip is electrically connected to the antenna and the impedance matching wiring portion, a noncontact IC tag is formed,

wherein connectable regions are provided in the impedance matching wiring portion, the regions making a direct or indirect connecting position of the IC chip to be adjustable within a predetermined range, so that effective partial length for impedance matching is made adjustable.

2. The antenna unit according to claim 1:

wherein the connectable regions are two ends of the impedance matching wiring portion, and the two ends are arranged approximately parallel to each other.

3. The antenna unit according to claim 2:

wherein the antenna is formed in a shape extending in an approximately perpendicular direction to the two ends parallel to each other.

4. The antenna unit according to claim 1:

wherein identification portions for identifying difference in performance due to connecting positions of the IC chip are provided near the connectable regions.

5. A noncontact IC tag having the antenna unit according to claim 1:

wherein an IC chip is electrically connected to the impedance matching wiring portion and the antenna.

6. The antenna unit according to claim 2:

wherein identification portions for identifying difference in performance due to connecting positions of the IC chip are provided near the connectable regions.

7. The antenna unit according to claim 3:

wherein identification portions for identifying difference in performance due to connecting positions of the IC chip are provided near the connectable regions.

8. A noncontact IC tag having the antenna unit according to claim 2:

wherein an IC chip is electrically connected to the impedance matching wiring portion and the antenna.

9. A noncontact IC tag having the antenna unit according to claim 3:

wherein an IC chip is electrically connected to the impedance matching wiring portion and the antenna.

10. A noncontact IC tag having the antenna unit according to claim 4:

wherein an IC chip is electrically connected to the impedance matching wiring portion and the antenna.

11. A noncontact IC tag having the antenna unit according to claim 6:

wherein an IC chip is electrically connected to the impedance matching wiring portion and the antenna.

12. A noncontact IC tag having the antenna unit according to claim 7:

wherein an IC chip is electrically connected to the impedance matching wiring portion and the antenna.