COMMUNICATION SHEET, SMART SHELF

• US 20140361855A1
• Filed: 11/16/2012
• Published: 12/11/2014
• Est. Priority Date: 12/02/2011
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Miyata, Akira
• Granted Patent: US 9,246,203 B2
• Time in Patent Office: Days
• US Class Current: 333/238
• CPC Class Codes: G06K 19/0772 Physical layout of the record carrier
• CPC Class Codes: G06K 7/10178 including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field comparable booster antennas integrated on the record carrier itself G06K19/07794
• CPC Class Codes: H01P 3/02 with two longitudinal conductors
• CPC Class Codes: H01P 3/081 Microstriplines
• 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

Abstract

A communication sheet (100) according to the present invention that transmits an electromagnetic wave for communication, includes a dielectric layer (120) including a dielectric substrate, a first conductor layer (110) including a mesh sheet-like mesh conductor disposed on one surface of the dielectric substrate; and a second conductor layer (130) including a sheet-like conductor disposed on another surface of the dielectric substrate opposite to the first conductor layer (110). The communication sheet (100) is provided which includes an opening whose width in a direction perpendicular to a traveling direction of the electromagnetic wave for communication traveling through the dielectric layer (120) is not less than 1/20 and not greater than ⅗ of a width in the direction perpendicular to the traveling direction of the dielectric substrate, the opening penetrating from the first conductor layer (110) to the second conductor layer.

Claims

1. A communication sheet that transmits an electromagnetic wave for communication, comprising:

a dielectric layer including a dielectric substrate;

a first conductor layer including a mesh sheet-like mesh conductor disposed on one surface of the dielectric substrate; and

a second conductor layer including a sheet-like conductor disposed on another surface of the dielectric substrate opposite to the first conductor layer,

wherein an opening whose width in a direction perpendicular to a traveling direction of the electromagnetic wave for communication traveling through the dielectric layer is not less than 1/20 and not greater than ⅗

of a width in the direction perpendicular to the traveling direction of the electromagnetic wave for communication of the dielectric substrate is provided, the opening penetrating from the first conductor layer to the second conductor layer.

2. The communication sheet according to claim 1, wherein

the dielectric substrate is a substantially rectangular sheet-like substrate in which the opening is provided, and

a length in a short-side direction of the dielectric substrate is not less than ⅓

and not greater than ½

of an effective wavelength of the electromagnetic wave for communication traveling through the dielectric layer.

3. The communication sheet according to claim 2, wherein as the opening, an opening is provided in a center in the short-side direction of the dielectric substrate, the opening having a substantially rectangular shape whose length in a short-side direction is set to be not less than 1/20 and not greater than ⅗

of the length in the short-side direction of the dielectric substrate.

4. The communication sheet according to claim 2, wherein as the opening, a plurality of openings are provided in parallel in the short-side direction of the dielectric substrate, each of the openings having a substantially rectangular shape whose length in a short-side direction is set to be not less than 1/20 and less than ½

of the length in the short-side direction of the dielectric substrate.

5. The communication sheet according to claim 3, wherein the length in the short-side direction of the opening is not less than 1/10 and not greater than ⅓

of the length in the short-side direction of the dielectric substrate.

6. The communication sheet according to claim 5, wherein the length in the short-side direction of the opening is not less than 1/7 and not greater than ¼

of the length in the short-side direction of the dielectric substrate.

7. The communication sheet according to claim 2, wherein as the opening, a plurality of openings are provided in parallel in a longitudinal direction of the dielectric substrate, each of the openings having a substantially rectangular shape whose length in a longitudinal direction is set to be not less than 1/20 and not greater than ⅗

of the length in the short-side direction of the dielectric substrate.

8. The communication sheet according to claim 2, wherein as the opening, provided is an opening having a meander shape whose width is set to be not less than 1/20 and not greater than ⅖

of the length in the short-side direction of the dielectric substrate.

9. A smart shelf comprising the communication sheet according to claim 1.