Antenna Device and Radio-Communication System Using the Same

• US 20090140947A1
• Filed: 10/27/2005
• Published: 06/04/2009
• Est. Priority Date: 11/08/2004
• Status: Abandoned Application

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Satoh, Yuki, Iguchi, Akihiko, Sasagawa, Misako
• Application Number:
  US10/585,084
• Publication Number:
  US 20090140947A1
• Time in Patent Office: Days
• US Class Current: 343/845
• 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 19/07771 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/19041 being a capacitor
• CPC Class Codes: H01L 2924/30107 Inductance
• CPC Class Codes: H01L 2924/3011 Impedance
• CPC Class Codes: H01Q 1/22 by structural association with other equipment or articles
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/0442 with particular tuning means
• CPC Class Codes: H01Q 9/0471 Non-planar, stepped or wedge-shaped patch

Abstract

An antenna device comprising: a substrate; a ground conductor provided on the bottom surface of the substrate; a radiation conductor, with a partial cutout, provided on the top surface of the substrate; a ground terminal provided on the partial cutout of the radiation conductor; a conductor connecting the ground conductor with the ground terminal; and a feed terminal connected to the radiation conductor, wherein the ground terminal and the feed terminal are connected via an IC chip is provided. The configuration can realize an antenna device capable of feeding electric power through the IC chip, and of operating even on a metal plate fully well. A radio communication system using the antenna device is provided additionally.

Claims

1. An antenna device comprising:

a substrate;

a ground conductor provided on the bottom surface of the substrate;

a radiation conductor, with a partial cutout, provided on the top surface of the substrate;

a ground terminal provided in the partial cutout of the radiation conductor;

a conductor to connect the ground conductor with the ground terminal; and

a feed terminal connected to the radiation conductor, wherein the ground terminal and the feed terminal are connected to an IC chip, and a slit is provided between the radiation conductor and the feed terminal.

3. The antenna device of claim 1, wherein a width of the radiation conductor differs between in a central portion and in both broad sides.

4. The antenna device of claim 1, wherein the radiation conductor is formed meandering in the central portion and flat in both broad sides.

5. The antenna device of claim 1, wherein the radiation conductor is formed spiral in the central portion and flat in both broad sides.

7. The antenna device of claim 1, wherein a step is provided on a surface of the substrate, and mounted parts of the IC chip including the ground terminal and the feed terminal, and a portion of radiation conductor are disposed on the step.

8. The antenna device of claim 7, wherein the step is molded by a dielectric.

9. The antenna device of claim 1, wherein the substrate is provided with cavities internally.

10. The antenna device of claim 1, wherein parasitic conductors electrically insulated from the radiation conductor are disposed on the substrate.

11. The antenna device of claim 1, wherein the substrate is formed from a flexible material.

12. The antenna of claim 1, wherein an insulation layer is provided on one of an entire surface of the ground conductor and a portion of the ground conductor.

13. A radio communication system having one of the antenna device of claim 1 dispose on a metal.

14. A radio communication system having the antenna device of claim 3 to dispose on a metal.

15. A radio communication system having the antenna device of claim 4 to dispose on a metal.

16. A radio communication system having the antenna device of claim 5 to dispose on a metal.

18. A radio communication system having the antenna device of claim 7 to dispose on a metal.

19. A radio communication system having the antenna device of claim 8 to dispose on a metal.

20. A radio communication system having the antenna device of claim 9 to dispose on a metal.

21. A radio communication system having the antenna device of claim 10 to dispose on a metal.

22. A radio communication system having the antenna device of claim 11 to dispose on a metal.

23. A radio communication system having the antenna device of claim 12 to dispose on a metal.

2. (canceled)

6. The antenna device of claim I, wherein a dent is formed between the ground terminal and the feed terminal, and the IC chip is embedded in the dent.

17. A radio communication system having the antenna device of claim 6 to dispose on a metal.