Antenna device and communications device

Patent metadata

Field	Value
Publication number	US-10224601-B2
Application number	US-201314426112-A
Country	US
Kind code	B2
Filing date	Sep 6, 2013
Priority date	Sep 6, 2012
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A small antenna device having good communications performance and a wide communications area even when a metal plate is present in the antenna communications direction, even when the antenna is arranged, for example, inside a box-shaped metal case, and even when a through hole is used that has a smaller area than the antenna. This device comprises: the antenna ( 8 ); a rear surface cover ( 3 ) overlapping with the antenna ( 8 ) and being a conductor that faces the winding of the antenna ( 8 ); two first insulating areas ( 10 a ) provided in the rear surface cover ( 3 ) and extending in a direction that intersects the winding axis of the antenna ( 8 ); and a second insulating area ( 10 b ) that connects between the first insulating areas ( 10 a ). At least part of the area sandwiched by the first insulating areas ( 10 a ) faces the antenna ( 8 ).

First claim

The invention claimed is:

1. A communication device having a generally rectangular planar shape, the communication device comprising:
a display panel;
a cover including a metal surface;
a slit arranged in the metal surface, the slit provided as a chipped inward portion of a side wall of the cover;
an insulating material filled in the slit;
a wound coil configured such that an electric current can flow according to a magnetic field from outside, the wound coil arranged between the display panel and the cover;
a camera; and
a battery,
wherein the slit in the metal surface, the wound coil, and the camera are positioned in an upper portion along a longitudinal direction of the generally rectangular planar shape of the communication device, and the battery is positioned in a lower portion along the longitudinal direction of the generally rectangular planar shape of the communication device.

2. The communication device according to claim 1 , wherein the wound coil is a Near Field Communication (NFC) antenna.

3. The communication device according to claim 1 , wherein the wound coil does not overlap with the slit in the metal surface.

4. The communication device according to claim 1 , wherein the slit has a linear shape.

5. The communication device according to claim 1 , wherein the slit extends to an end portion of the cover.

6. The communication device according to claim 1 , wherein the slit is parallel to an edge line of the cover.

7. The communication device according to claim 1 , wherein the slit includes two linear portions which are parallel to each other.

8. The communication device according to claim 1 , wherein the wound coil is a coil pattern on a flexible substrate.

9. The communication device according to claim 1 , wherein a length of the slit in a longitudinal direction of the slit is longer than a length of the wound coil in the longitudinal direction of the slit.

10. The communication device according to claim 1 , wherein at least a portion of the wound coil overlaps with the metal surface.

Assignees

• Panasonic Ip Man Co Ltd
• Panasonic Intelletual Property Man Co Ltd

Inventors

• Yamaguchi Shuichiro
• Sakai Hiroshi

Classifications

• H01Q7/00

  Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop · CPC title

• H01Q13/16

  Folded slot antennas · CPC title

• G06K7/10316

  using at least one antenna particularly designed for interrogating the wireless record carriers (antennas in general H01Q1/22) · CPC title

• G06K7/10336

  the antenna being of the near field type, inductive coil · CPC title

• H01Q1/24

  with receiving set · CPC title