MEDIA CASE AND CIRCUIT PATTERN SHEET

• US 20080246616A1
• Filed: 02/28/2008
• Published: 10/09/2008
• Est. Priority Date: 04/03/2007
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: SAKAMA, Isao, Hoshino, Osamu
• Application Number:
  US12/039,323
• Publication Number:
  US 20080246616A1
• Time in Patent Office: Days
• US Class Current: 340/572.7
• CPC Class Codes: G11B 33/0411 Single disc boxes G11B33/0461 takes precedence
• 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 1/38 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

Abstract

A media case and a circuit pattern sheet with a simple configuration is provided that allows highly dense collection and reliable recognition of housed disk media.

The media case 1 can house disk media 50 provided with an RFID tag (not illustrated in the drawing). This media case 1 includes an antenna element 51a being formed on its back plane to exchange an electromagnetic wave signal with the outside of the media case 1; a waveguide line 52a formed in the vicinity of its center therethrough along the disk media 50 from the antenna element 51a to guide high-frequency signals representing the electromagnetic wave signals to the antenna element 51a; and a resonance element 53a being formed adjacent to this waveguide line 52a and electromagnetically induced by the high-frequency signal.

Claims

1. A media case, which can house disk media provided with an RFID tag, including an upper plane and a bottom plane to be arranged substantially in parallel to the relevant disk media and a circumferential plane being present between the upper plane and the bottom plane, comprising:

an antenna element being formed across a predetermined length on the periphery plane or being formed across a predetermined length in contact with the circumferential plane on the upper plane or the bottom plane to exchange an electromagnetic signal with outside;

a waveguide line formed along the disk media from the antenna element, passing the vicinity of the center of the disk media, to guide high-frequency signals representing the electromagnetic wave signals to the antenna element; and

a resonance element being inserted in the waveguide line to guide the high-frequency signals or being formed adjacent to the waveguide line and electromagnetically induced by the high-frequency signal.

3. The media case according to claim 1, wherein the circumferential plane is a square case consisting of four flat planes.

4. The media case according to claim 1, wherein the RFID tag is applied to the disk media in the vicinity of its center and the RFID tag is positioned in the vicinity of the waveguide line or the resonance element when the disk media is housed.

5. The media case according to claim 1, wherein the waveguide line is connected to the antenna element in the vicinity of its center.

6. The media case according to claim 1, wherein:

the antenna element consists of a first element and a second element with ends thereof being adjacently arranged;

the waveguide line consists of a first line and a second line being arranged mutually in parallel; and

the end of the first line is connected to the end of the first element and the end of the second line is connected to the end of the second line.

7. The media case according to claim 1, wherein

the resonance element has length of a half of wavelength of the electromagnetic wave signal.

8. The media case according to claim 1, comprising a plurality of the resonance elements.

9. The media case according to claim 1, including the resonance element extending in parallel to the waveguide line.

10. The media case according to claim 1, including the resonance element extending in the direction crossing the waveguide line.

11. The media case according to claim 1, wherein

at least one of the antenna element, the waveguide line and the resonance element is formed on a dielectric film and attached to the relevant media case.

12. The media case according to claim 1, wherein

a base member of the relevant media case is made of rigid plastic.

14. The media case according to claim 1, being a three-piece type comprising a tray retaining the disk media, a bottom housing the tray and a lid capable of opening and closing the bottom, wherein

at least one of the antenna element, the waveguide line and the resonance element is formed in a rear card to be inserted between the tray and the bottom.

2. A media case, which can house disk media provided with an RFID tag, including an upper plane and a bottom plane to be arranged substantially in parallel to the relevant disk media, comprising:

an antenna element being formed across a predetermined length on the periphery of the upper plane or the bottom plane to exchange an electromagnetic wave signal with the outside;

a waveguide line formed along the disk media from the antenna element, passing the vicinity of the center of the disk media, to guide high-frequency signals representing the electromagnetic wave signals to the antenna element; and

a resonance element being inserted in the waveguide line to guide the high-frequency signals or being formed adjacent to the waveguide line and electromagnetically induced by the high-frequency signal.

13. The media case according to claim 2, wherein

a base member of the relevant media case is a flexible sleeve.

15. A circuit pattern sheet, which is applied to a case capable of housing disk media provided with an RFID tag and transmits a signal between the RFID tag and the outside, comprising:

a film-like dielectric sheet;

an antenna element being formed across a predetermined length along an outer border of the dielectric sheet to exchange an electromagnetic wave signal with the outside;

a waveguide line formed on the dielectric sheet along the disk media from the antenna element, passing the vicinity of the center of the disk media, to guide high-frequency signals representing the electromagnetic wave signals to the antenna element; and

a resonance element being formed on the dielectric sheet and inserted in the waveguide line to guide the high-frequency signals or being formed adjacent to the waveguide line and electromagnetically induced by the high-frequency signal.

16. The circuit pattern sheet according to claim 15, being capable of being pasted to the case or capable of being housed in the case together with the disk media.