Antenna device and communication terminal apparatus

• US 9,825,365 B2
• Filed: 01/17/2017
• Issued: 11/21/2017
• Est. Priority Date: 09/07/2010
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Miura, Teppei, Sasaki, Jun, Kubo, Hiroyuki, Taniguchi, Katsumi, Kato, Noboru, Ozawa, Masahiro, Ishino, Satoshi
• Primary Examiner(s): Levi, Dameon E
• Assistant Examiner(s): LOTTER, DAVID E
• Application Number:
  US15/407,807
• Publication Number:
  US 20170125905A1
• Time in Patent Office: 308 Days
• Field of Search: 343788, 455 411, 455 41, 455 2
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06K 7/10336 the antenna being of the near field type, inductive coil
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 21/293 one unit or more being an array of identical aerial elements adaptive arrays H01Q3/2605
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• 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
• CPC Class Codes: H01Q 7/08 Ferrite rod or like elongated core

Abstract

An antenna device that includes a coil antenna with a coil conductor wound around a winding axis. The device further includes a planar conductor with a surface and an edge end portion, where the surface extends in the direction of the winding axis and the edge end portion is adjacent to a coil opening of the coil conductor. A booster antenna is also provided and includes a looped or spiral coil conductor and is coupled to the planar conductor and/or the coil antenna.

Claims

1. A coil antenna comprising:

a body;

a coil conductor located in the body, the coil conductor having first and second opposite ends;

a coupling electrode arranged in the body, the coil conductor and the coupling electrode being magnetically coupled to each other; and

first, second, third and fourth connection electrodes disposed on an outer surface of the body;

the first and second connection electrodes being electrically connected to the first and second ends of the coil conductor, respectively, and being arranged to connect the coil conductor to a feed circuit;

the third and fourth connection electrodes being electrically connected to opposite ends of the coupling electrode.

2. The coil antenna according to claim 1, wherein the coil antenna is a surface mount type chip coil antenna.

3. The coil antenna according to claim 1, wherein the body includes a magnetic core.

4. The coil antenna according to claim 1, wherein a winding axis of the coil conductor is parallel to a surface which the coil antenna mounted on.