ANTENNA

• US 20140168026A1
• Filed: 07/20/2012
• Published: 06/19/2014
• Est. Priority Date: 07/22/2011
• Status: Active Grant

• Current Assignee: Hitachi Metals (Thailand) Ltd.
• Original Assignee: Hitachi Metals (Thailand) Ltd.
• Inventors: Nakamura, Masaki, Okamoto, Hiroshi, Miki, Hirohiko
• Granted Patent: US 9,559,421 B2
• Time in Patent Office: Days
• US Class Current: 343/788
• CPC Class Codes: H01F 5/04 Arrangements of electric connections to coils, e.g. leads
• CPC Class Codes: H01Q 1/40 Radiating elements coated with or embedded in protective material
• CPC Class Codes: H01Q 7/00 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 Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence

Abstract

An antenna comprising a coreless coil formed by winding a conductor wire, a relay member connected to the coil, and a magnetic plate member covering the coil and part of the relay member; the relay member comprising a substrate having a notch for lead wires of the coil, and a pair of terminal members formed on the substrate; each terminal member comprising an internal terminal portion connected to an end of each lead wire, an external terminal portion connected to an external circuit, and a line portion connecting the internal terminal portion to the external terminal portion; the coil and part of the relay member disposed on the magnetic member being fixed to a first adhesive layer on the non-transmission side of the coil; and the internal terminal portion being positioned in a region overlapping the magnetic member, or in a region surrounded by the notch of the magnetic member.

Claims

1. An antenna comprising a coreless coil formed by winding a conductor wire, a relay member connected to said coil, and a magnetic plate member covering said coil and part of said relay member;

said relay member comprising a substrate having a notch, through which lead wires of said coil pass, and a pair of terminal members formed on said substrate, each terminal member comprising an internal terminal portion connected to an end of each lead wire, an external terminal portion connected to an external circuit, and a line portion connecting said internal terminal portion to said external terminal portion;

said coil and part of said relay member disposed on said magnetic member being fixed to a first adhesive layer on the non-transmission side of said coil; and

said internal terminal portions being positioned in a region overlapping said magnetic member, or in a region surrounded by a hole or notch of said magnetic member.

2. The antenna according to claim 1, wherein said relay member comprises a first region overlapping said magnetic member, and a second region extending from an outer periphery of said magnetic member;

and wherein said external terminal portions in said second region are exposed on the transmission surface side of said magnetic member.

3. The antenna according to claim 1, wherein said second region of said relay member is bent to the magnetic member side, so that said external terminal portions appear on a non-transmission surface side of said magnetic member.

4. The antenna according to claim 1, wherein both of said coil and said relay member are covered with a second adhesive layer provided on the transmission side of said coil.

5. The antenna according to claim 1, wherein a protective layer of a resin film is attached to the non-transmission surface side of said magnetic member.

6. The antenna according to claim 1, wherein said relay member extends to an inner periphery of said coil.

7. The antenna according to claim 1, wherein said magnetic member is constituted by pluralities of pieces attached to the first adhesive layer for flexibility.

8. The antenna according to claim 7, wherein pluralities of said pieces are formed by dividing said magnetic member along its slits, through-holes or recesses.