Communication sheet, smart shelf

• US 9,373,877 B2
• Filed: 11/22/2012
• Issued: 06/21/2016
• Est. Priority Date: 12/02/2011
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Miyata, Akira
• Primary Examiner(s): Takaoka, Dean
• Application Number:
  US14/362,165
• Publication Number:
  US 20140340179A1
• Time in Patent Office: 1,307 Days
• Field of Search: 333/24.R, 333/236, 340/572.1, 340/572.9
• US Class Current: 1/1
• CPC Class Codes: G06K 19/0772 Physical layout of the record carrier
• CPC Class Codes: H01P 3/02 with two longitudinal conductors
• 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 15/14 Reflecting surfaces; Equivalent structures electromagnetic shields H01Q1/526
• CPC Class Codes: H04B 13/00 Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00

Abstract

The communication sheet according to the present invention includes a dielectric layer including a dielectric substrate, a first conductor layer that is a conductor layer including a mesh sheet-like mesh conductor disposed on one surface of the dielectric substrate, wherein an opening region from where the mesh conductor is removed is formed, and a second conductor layer that is a conductor layer including a sheet-like sheet conductor disposed on another surface of the dielectric substrate opposite to the first conductor layer, wherein the sheet conductor in a region opposite to the opening region from where the mesh conductor is removed is not removed.

Claims

1. A communication sheet comprising:

a dielectric layer including a dielectric substrate;

a first conductor layer that is a conductor layer including a mesh sheet-like mesh conductor disposed on one surface of the dielectric substrate, wherein an opening region from where the mesh conductor is removed is formed; and

a second conductor layer that is a conductor layer including a sheet-like sheet conductor disposed on another surface of the dielectric substrate opposite to the first conductor layer, wherein the sheet conductor in a region opposite to the opening region from where the mesh conductor is removed is not removed, wherein

the dielectric substrate is a substantially rectangular sheet-like substrate,

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 an electromagnetic wave for communication that travels through the dielectric layer,

as the opening region provided in the first conductor layer, an opening region is provided in a center in the short-side direction of the dielectric substrate, the opening region having a substantially rectangular shape whose length in a short-side direction is not less than 1/20 and not greater than ⅖

of the length in the short-side direction of the dielectric substrate, and

the opening region is not penetrating from the first conductor layer to the second conductor layer.

2. The communication sheet according to claim 1, wherein the opening region provided in the first conductor layer has a meander shape.

3. The communication sheet according to claim 1, wherein in the dielectric substrate, dielectrics of a portion corresponding to the opening region provided in the first conductor layer are cut out.

4. A smart shelf, wherein two communication sheets according to claim 1 are arranged opposed to each other.

5. A communication sheet comprising:

a dielectric layer including a dielectric substrate;

a first conductor layer that is a conductor layer including a mesh sheet-like mesh conductor disposed on one surface of the dielectric substrate, wherein an opening region from where the mesh conductor is removed is formed; and

a second conductor layer that is a conductor layer including a sheet-like sheet conductor disposed on another surface of the dielectric substrate opposite to the first conductor layer, wherein the sheet conductor in a region opposite to the opening region from where the mesh conductor is removed is not removed, wherein

the dielectric substrate is a substantially rectangular sheet-like substrate,

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 an electromagnetic wave for communication that travels through the dielectric layer,

as the opening region provided in the first conductor layer, a plurality of opening regions are arranged in parallel in a longitudinal direction of the dielectric substrate, each of the opening regions having a substantially rectangular shape whose length in a longitudinal direction 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, and

the opening region is not penetrating from the first conductor layer to the second conductor layer.

6. A communication sheet comprising:

a dielectric layer including a dielectric substrate;

a first conductor layer that is a conductor layer including a mesh sheet-like mesh conductor disposed on one surface of the dielectric substrate, wherein an opening region from where the mesh conductor is removed is formed; and

a second conductor layer that is a conductor layer including a sheet-like sheet conductor disposed on another surface of the dielectric substrate opposite to the first conductor layer, wherein the sheet conductor in a region opposite to the opening region from where the mesh conductor is removed is not removed, wherein

the dielectric substrate is a substantially rectangular sheet-like substrate,

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 an electromagnetic wave for communication that travels through the dielectric layer,

as the opening region provided in the first conductor layer, a plurality of opening regions are provided in parallel in the short-side direction of the dielectric substrate, each of the opening regions 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 ⅖

of the length in the short-side direction of the dielectric substrate, and

the opening region is not penetrating from the first conductor layer to the second conductor layer.