Antenna device and electronic apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorHiromitsu Ito
Life of this patent
Estimating the term…
Abstract
An antenna device includes an antenna coil, a magnetic sheet, and a metallic member. The antenna coil is formed on a flexible base. The antenna coil is wound into a loop or a spiral in which a winding central portion is a coil opening portion. The magnetic sheet is disposed at a back surface of the flexible base. A square opening is formed in the metallic member. The antenna coil is exposed from the opening of the metallic member. A first side of the antenna coil is hidden by the metallic member and part of the coil opening portion and a second side are exposed from the opening, so that a magnetic flux links with the second side.
Claims16
An antenna device comprising:
- a planar metallic member;
- and
- an antenna coil that is wound into a loop or a spiral,
- wherein the metallic member has an opening whose entire periphery is surrounded by a metal,
- wherein the antenna coil is disposed on a side of one principal surface of the metallic member such that both of an inner region and an outer region of the antenna coil overlap the opening in a plan view that is in a direction perpendicular to a plane defined by the side of the one principal surface of the metallic member, and
- wherein a magnetic sheet is provided on a side of the antenna coil that is opposite to the metallic member.
An antenna device comprising:
- a planar metallic member;
- and
- an antenna coil that is wound into a loop or a spiral, wherein the metallic member has an opening whose entire periphery is surrounded by a metal,
- wherein the antenna coil is disposed on a side of one principal surface of the metallic member, and a magnetic sheet is provided on a side of the antenna coil that is opposite to the metallic member, and
- wherein the antenna coil is disposed such that a magnetic flux that enters from a side of the other principal surface of the metallic member via the opening and that exits from the side of the one principal surface of the metallic member towards the side of the other principal surface via the opening links with the antenna coil.
Dependencies are inferred from the claim text.