ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS

• US 20170125905A1
• Filed: 01/17/2017
• Published: 05/04/2017
• 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
• Granted Patent: US 9,825,365 B2
• Time in Patent Office: Days
• 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;

a coupling electrode arranged in the body; and

four connection electrodes disposed on the body;

wherein two of the connection electrodes are electrically connected to opposite ends of the coil conductor, respectively, and are arranged to connect the coil conductor to a feed circuit;

the other two of the connection electrodes being electrically connected to opposite ends of the coupling electrode, the coil conductor and the coupling electrode being magnetically coupled to each other.

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.