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Title:
READER/WRITER AND AUTOMATIC TICKET CHECKER FOR CHECKING TICKET BY READER/WRITER
Document Type and Number:
WIPO Patent Application WO/2004/025547
Kind Code:
A1
Abstract:
An antenna device for preventing communication failure by reducing the sub communicatable region formed around an antenna coil portion of a reader/writer. The antenna device (200) is provided to a reader/writer (20) for information communication between an IC card (10) and signal processing circuits (210, 220) through an electromagnetic wave. The antenna device (200) is made to relatively approach an antenna coil (100) of the IC card (10) and is composed of an antenna coil portion having a loop antenna (202) formed on the surface of a substrate (201) and a conductor portion (203) formed on the same surface of the substrate outside the antenna coil portion.

Inventors:
Maeda, Tatsuo c/o SONY CORPORATION (7-35 Kitashinagawa 6-chom, Shinagawa-ku Tokyo, 141-0001, JP)
Yamagata, Akihiko c/o SONY CORPORATION (7-35 Kitashinagawa 6-chom, Shinagawa-ku Tokyo, 141-0001, JP)
Application Number:
PCT/JP2003/011571
Publication Date:
March 25, 2004
Filing Date:
September 10, 2003
Export Citation:
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Assignee:
SONY CORPORATION (7-35, Kitashinagawa 6-chome Shinagawa-ku, Tokyo, 141-0001, JP)
Maeda, Tatsuo c/o SONY CORPORATION (7-35 Kitashinagawa 6-chom, Shinagawa-ku Tokyo, 141-0001, JP)
Yamagata, Akihiko c/o SONY CORPORATION (7-35 Kitashinagawa 6-chom, Shinagawa-ku Tokyo, 141-0001, JP)
International Classes:
G06K17/00; G06K7/08; G06K7/10; H01Q1/22; H01Q1/38; H01Q7/00; H01Q19/28; H04B5/02; (IPC1-7): G06K17/00; H01Q7/00
Attorney, Agent or Firm:
Nakamura, Tomoyuki c/o Miyoshi International Patent Office (9th Floor Toranomon Daiichi Building, 2-3, Toranomon 1-chom, Minato-ku Tokyo, 105-0001, JP)
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