Antenna coil device

Details Antenna coil device Antenna coil device

2006-04-25

2006-04-25

Nguyen, Hoang V. (Department: 2821)

Communications: radio wave antennas

Antennas

With vehicle

C343S788000

Reexamination Certificate

active

07034756

ABSTRACT:
In an antenna coil device11, a coil portion12having a lead wire2wound around a magnetic core1is mounted on a case3made of plastic resin, and on one side of the case3, terminal boards4and5that electrically connect one end and the other end of the lead wire2of the coil portion12to an external device are placed in a protruding manner. A through hole4D is provided in an inserting end portion4C of the terminal board4, a through hole5H is provided in a central flat portion5G of the terminal board5, and the two through holes4D and5H are placed opposite each other. This reduces stray capacitance caused between the two terminal boards4and5connected to both ends of the coil portion12, and allows a self resonance frequency band where an impedance is equal to or above a predetermined value to be shifted to a high frequency side.

REFERENCES:
patent: 4752680 (1988-06-01), Larsson
patent: 5334988 (1994-08-01), Murakami et al.
patent: 8-335820 (1996-12-01), None
patent: 9-213528 (1997-08-01), None
patent: 10-189350 (1998-07-01), None

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