# US 8,570,240 B2 · Communication sheet structure

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- Number: US 8,570,240 B2
- Document ID: US8570240B2
- Status: Granted
- Kind: B2
- Application number: 12/996,839
- Filed: 2008-06-27
- Published: 2011-04-14
- Granted: 2013-10-29
- Earliest claimed: 2008-06-27
- Assignees: Teijin Fibers Limited
- Applicants: Akira Tanaka; Machiko Oouchida; Hiroyuki Mori
- Inventors: Akira Tanaka; Machiko Oouchida; Hiroyuki Mori
- Web page: https://patentgrep.com/patent/US8570240B2

## CPC

- H04B 13/00: Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B: TRANSMISSION

## Abstract

A communication sheet structure for transmitting electromagnetic waves, and thereby performing communication, is characterized in that the communication sheet structure includes a planar base material with a relative dielectric constant at a frequency of from 800 MHz to 10 GHz of from 1.0 to 15.0, and one side of the base material includes conductor A existing portion and non-existing portion, and the other side of the base material includes a conductor B existing over 90% or more thereof. The communication sheet structure enables communication in two dimensions, and the communication sheet structure is extremely excellent in communication performances.

## Claims

### Claim 1

A communication sheet structure for transmitting electromagnetic waves, and thereby performing communication, characterized in that the communication sheet structure comprises a planar base material with a relative dielectric constant at a frequency of from 800 MHz to 10 GHz of from 1.0 to 15.0, and one side of the base material includes conductor A existing portion and non-existing portion, and the other side of the base material includes a conductor B existing over 90% or more thereof, wherein the conductor A existing portion surrounds the conductor A non existing portion.

### Claim 2 (depends on 1)

The communication sheet structure according to claim 1, wherein the electric resistance values of the conductor A and the conductor B are 5 Ω/□ or less.

### Claim 3 (depends on 1)

The communication sheet structure according to claim 1, wherein the conductor A is disposed in a lattice.

### Claim 4 (depends on 3)

The communication sheet structure according to claim 3, wherein the line width of the lattice is from 0.5 mm to 5.0 mm, and the line spacing is from 3 mm to 50 mm.

### Claim 5 (depends on 1)

The communication sheet structure according to claim 1, wherein the base material comprises a fiber structure.

### Claim 6 (depends on 5)

The communication sheet structure according to claim 5, wherein the fiber structure is a nonwoven fabric in which the number of fibers oriented in the thickness direction is larger than the number of fibers oriented in the planar direction.

### Claim 7 (depends on 5)

The communication sheet structure according to claim 5, wherein the fiber forming the fiber structure is a modified cross-section fiber.

### Claim 8 (depends on 1)

The communication sheet structure according to claim 1, wherein the base material is an elastomer resin or an elastomer fiber structure.

### Claim 9 (depends on 1)

The communication sheet structure according to claim 1, wherein the conductor A and the base material are covered with a protective layer A, or at least the conductor B is covered with a protective layer B.

### Claim 10 (depends on 9)

The communication sheet structure according to claim 9, wherein the protective layer A or B is an elastomer resin or an elastomer fiber structure.

### Claim 11 (depends on 9)

The communication sheet structure according to claim 9, wherein the protective layer A or B is a high density woven fabric with a cover factor of 1000 to 2500.