Title:
BOBBIN AND BIAXIAL LOOP ANTENNA PROVIDED WITH THE BOBBIN
Document Type and Number:
Japanese Patent JP3558014
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a biaxial loop antenna provided with a bobbin, on which a coil can easily be wound, that can be downsized without interference for coil winding.
SOLUTION: The biaxial loop antenna 10 consists of a 1st antenna ANT 1 where a series resonance circuit is formed with a 1st resonance capacitor C1 connected in series with a coil 14 wound on a bobbin 11 with a ferrite 12 placed therein and of a 2nd antenna ANT 2 where a parallel resonance circuit is formed with a 2nd resonance capacitor C2 connected in parallel with the series connection of a link coil 13a wound coaxially with the 1st coil 14 and a 2nd coil 13 to produce two different magnetic field components. The bobbin 11 is structured such that the bobbin 11 has a terminal 6 at one side and a sidewall 11s on the other side on which the 2nd coil 13 is wound has a thin rib 11r thinner than the sidewall 11s on both sides.
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Inventors:
Yuichi Murakami
Mitsuhiro Kamo
Eiji Mushimei
Kazuyoshi Mori
Mitsuhiro Kamo
Eiji Mushimei
Kazuyoshi Mori
Application Number:
JP2000214421A
Publication Date:
August 25, 2004
Filing Date:
July 14, 2000
Export Citation:
Assignee:
Aisin Seiki Co., Ltd.
International Classes:
E05B1/00; B60J5/04; B60R11/02; H01Q1/22; H01Q1/32; H01Q1/40; H01Q1/44; H01Q7/08; H01Q21/28; (IPC1-7): H01Q7/08
Domestic Patent References:
| JP11340734A | ||||
| JP58187120U | ||||
| JP463608U | ||||
| JP58187120U | ||||
| JP58187120U | ||||
| JP51010552U | ||||
| JP11340734A | ||||
| JP6013213U |