Antenna device

• US 10,396,463 B2
• Filed: 11/16/2016
• Issued: 08/27/2019
• Est. Priority Date: 11/19/2015
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Otsuki, Takashi
• Primary Examiner(s): Tran, Hai V
• Assistant Examiner(s): Bouizza, Michael M
• Application Number:
  US15/353,349
• Publication Number:
  US 20170149141A1
• Time in Patent Office: 1,014 Days
• CPC Class Codes: H01Q 1/2291 used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN] H01Q1/241 takes precedence; WLAN in general H04W
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• CPC Class Codes: H01Q 9/27 Spiral antennas
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/43 Antennas

Abstract

An antenna device is formed by winding a conductive wire around a magnetic member unit, and in which the magnetic member unit comprises a plurality of magnetic-member individual pieces.

Claims

1. An antenna device formed by winding a conductive wire around a magnetic member, the conductive wire forming a coil having a central axis,

wherein the magnetic member comprises a plurality of magnetic-member individual pieces spaced apart from each other, including a first row of magnetic-member individual pieces, the first row being arranged in a direction of the central axis of the coil, and

wherein the plurality of magnetic-member individual pieces further includes a second row of magnetic member-individual pieces, the second row being arranged in a direction of the central axis of the coil and being adjacent to the first row.

2. The antenna device according to claim 1, wherein, in the magnetic member, the plurality of magnetic-member individual pieces are made of sheet members.

3. The antenna device of claim 1, wherein the magnetic member is a flexible sheet member having flexibility.

4. The antenna device of claim 1, further comprising resin members, wherein the magnetic-member individual pieces are fixed by being sandwiched between the resin members.

5. An antenna device formed by winding a conductive wire around a magnetic member, the conductive wire forming a coil having a central axis,

wherein the magnetic member comprises a plurality of magnetic-member individual pieces spaced apart from each other, including a first row of magnetic-member individual pieces, the first row being arranged in a direction of the central axis of the coil,

wherein the plurality of magnetic-member individual pieces are arranged in an n×

m array, wherein n and m are integers greater than one.

6. An antenna device formed by winding a conductive wire around a magnetic member, wherein the magnetic member comprises a plurality of magnetic-member individual pieces that are equidistantly spaced apart from each other and arranged in an n×

m array, wherein n and m are integers greater than one.

7. The antenna device of claim 6, wherein the magnetic member is a flexible sheet member having flexibility.

8. The antenna device of claim 6, further comprising resin members, wherein the magnetic-member individual pieces are fixed by being sandwiched between the resin members.