Triaxial antenna coil

• US 7,042,411 B2
• Filed: 10/12/2004
• Issued: 05/09/2006
• Est. Priority Date: 10/20/2003
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Toko KK
• Inventors: Murakami, Shin, Yagi, Masayoshi
• Primary Examiner(s): Nguyen, Hoang V.
• Application Number:
  US10/964,033
• Publication Number:
  US 20050083242A1
• Time in Patent Office: 574 Days
• Field of Search: 343/788, 343/787
• US Class Current: 343/788
• CPC Class Codes: H01F 2003/005 Magnetic cores for receiving several windings with perpendicular axes, e.g. for antennae or inductive power transfer
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence

Abstract

A triaxial antenna coil prevents wires from snapping, increases productivity, is resilient against dropping, and is suitable for being made small and light. A triaxial antenna coil includes coils, that are wound around three intersecting winding axes, and a flat core having winding grooves in three intersecting axial directions. A base has a terminal element, that is fitted with a plurality of external connectors and terminal connectors of windings. The base is fixed to one face of the core. The coils are wound in respective winding grooves, and their terminals are connected to the terminal connectors of the terminal element.

Claims

1. A triaxial antenna coil having coils that are wound around three intersecting axes, the triaxial antenna coil comprising:

a flat core having winding grooves in three intersecting axial directions; and

a base being worked into a continuous hoop of phosphor bronze and being continuously molded from a heat-resistant resin having insulating properties, the base having a terminal element that is fitted with a plurality of external connectors and terminal connectors of windings;

a face of the core being fixed to the base, the coils being wound in the winding grooves, respectively, and their terminals being connected to the terminal connectors of the terminal element.

2. A triaxial antenna coil having coils that are wound around three intersecting axes, the triaxial antenna coil comprising:

a flat core having winding grooves in three intersecting axial directions; and

a base having a terminal element that is fitted with a plurality of external connectors and terminal connectors of windings, the plurality of external connectors and the terminal connectors of windings being arranged approximately evenly in eight positions around side faces of the base;

a face of the core being fixed to the base, the coils being wound in the winding grooves, respectively, and their terminals being connected to the terminal connectors of the terminal element.

3. A triaxial antenna coil having coils that are wound around three intersecting axes, the triaxial antenna coil comprising:

a flat core having winding grooves in three intersecting axial directions;

a base having a terminal element, that is fitted with a plurality of external connectors and terminal connectors of windings;

the base being fixed to one face of the core, the coils being wound in respective winding grooves, and their terminals being connected to the terminal connectors of the terminal element;

an outer periphery being molded by using an exterior resin, and the external connectors being made by forming.

4. The triaxial antenna coil according to claim 3, wherein the base is continuously molded from a heat-resistant resin having insulating properties, and the plurality of external connectors and the terminal connectors of windings are worked into a continuous hoop of phosphor bronze.

5. The triaxial antenna coil according to claim 3, wherein the plurality of external connectors and the terminal connectors of windings are arranged approximately evenly in eight positions around side faces of the base.