# US 8,570,225 B2 · Antenna device and mobile device

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- Number: US 8,570,225 B2
- Document ID: US8570225B2
- Status: Granted
- Kind: B2
- Application number: 12/955,535
- Filed: 2010-11-29
- Published: 2011-09-29
- Granted: 2013-10-29
- Earliest claimed: 2010-03-25
- Assignees: Sony Corporation; Sony Mobile Communications Inc.
- Applicants: Hideaki Shoji; Yoshiki Kanayama
- Inventors: Hideaki Shoji; Yoshiki Kanayama
- Web page: https://patentgrep.com/patent/US8570225B2

## CPC

- H01Q 1/243: {with built-in antennas}
- H01Q 9/40: Element having extended radiating surface
- H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

An antenna element including a feeding part and a mesh part including at least a part of an area formed in a mesh state. The feeding part and an area of the antenna element in close proximity to the mesh part are formed of a finer mesh than the mesh part or formed of a solid.

## Claims

### Claim 1

An antenna element comprising:
a feeding part; and
a mesh part including at least a part of an area formed in a mesh state, wherein
the feeding part and an area of the antenna element in close proximity to the mesh part are formed of a finer mesh than the mesh part or formed of a solid,
a portion of the antenna element is configured to be bent, and the bent portion is formed of a finer mesh than the mesh part or formed of a solid,
a relationship between a line width W and a line interval D of the mesh part substantially satisfies D≧22W, and
the line width W is equal to or greater than double a skin depth of a conductive material of the mesh part with respect to a target frequency of the antenna element.

### Claim 2 (depends on 1)

The antenna element according to claim 1, wherein
a density of the mesh part is changed stepwise or continuously.

### Claim 3 (depends on 1)

The antenna element according to claim 1, wherein
the antenna element has a ground section, and only an area other than the feeding part and the ground section is formed in the mesh state.

### Claim 4 (depends on 1)

The antenna element according to claim 1, wherein
a width of an outermost peripheral line of the mesh part is greater than a width of an inner line in the mesh part.

### Claim 5

An antenna device comprising:
a first antenna element including
a first feeding part; and
a first mesh part including at least a part of an area formed in a mesh state, wherein
the first feeding part and an area of the first antenna element in close proximity to the first mesh part are formed of a finer mesh than the first mesh part or formed of a solid; and
a second antenna element including
a second feeding part; and
a second mesh part including at least a part of an area formed in a mesh state,
wherein the second feeding part and an area of the second antenna element in close proximity to the second mesh part are formed of a finer mesh than the second mesh part or formed of a solid, and wherein
a portion of each of the first and second antenna elements is configured to be bent, and the bent portion is formed of a finer mesh than the first and second mesh parts or formed of a solid,
a relationship between a line width W and a line interval D of each of the first and second mesh parts substantially satisfies D≧22W, and
the line width W of each of the first and second mesh parts is equal to or greater than double a skin depth of a conductive material of each of the first and second mesh part, respectively, with respect to the first and second target frequencies of each of the first and second antenna elements.

### Claim 6 (depends on 5)

The antenna device of claim 5, wherein
the first antenna element corresponds to a first target frequency, and the second antenna element corresponds to a second target frequency.

### Claim 7 (depends on 5)

The antenna device according to claim 5, wherein the first and second antenna elements are formed on a flexible printed circuit made of a transparent material.

### Claim 8 (depends on 7)

The antenna device according to claim 7, further comprising:
a transparent supporting member to which the flexible printed circuit is adhered.

### Claim 9

A mobile device comprising:
an antenna element including
a feeding part; and
a mesh part including at least a part of an area formed in a mesh state, wherein
the feeding part and an area of the antenna element in close proximity to the mesh part are formed of a finer mesh than the mesh part or formed of a solid,
a portion of the antenna element is configured to be bent, and the bent portion is formed of a finer mesh than the mesh part or formed of a solid,
a relationship between a line width W and a line interval D of the mesh part substantially satisfies D≧22W, and
the line width W is equal to or greater than double a skin depth of a conductive material of the mesh part with respect to a target frequency of the antenna element.

### Claim 10 (depends on 9)

The mobile device according to claim 9, further comprising:
a light emitting element; and
a light emitting section configured to output light emitted from the light emitting element through at least the mesh part of the antenna element.

### Claim 11 (depends on 10)

The mobile device according to claim 10, wherein
the mobile device is a mobile telephone terminal, and at the time of receiving at least a telephone call or a message at the mobile telephone terminal, the light emitting section is configured to display an icon, a symbol, or a character.