Antenna structure and wave clock having the antenna...

Details Antenna structure and wave clock having the antenna... Antenna structure and wave clock having the antenna...

2007-09-25

2007-09-25

Nguyen, Hoang V. (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

C343S718000, C343S787000, C029S600000

Reexamination Certificate

active

11341758

ABSTRACT:
An antenna structure that can be received in a case in a condition that an occupied space is minimized, and allows reception of an electric wave at excellent sensitivity, and a wave clock having the antenna structure, and a method for manufacturing the antenna structure are provided. An antenna structure of a wave clock has an arcuately curved, soft-magnetic magnetic core member, and a coil wound on the center in an extending direction of the magnetic core member, and is received in a case. In the antenna structure, the magnetic core member has outer circumferential surfaces at at least one of ends exposed from the coil, the surfaces extending non-arcuately such that it is situated at more inner circumferential side as it approaches a tip. The arcuately curved, magnetic core member is formed by laminating plural sheets of soft magnetic, thin leaves and the soft magnetic, thin leaf at an inner circumferential side is large in circumferential length compared with the soft magnetic, thin leaf at an outer circumferential side. The soft magnetic, thin leaves are formed by laminating plural sheets of soft magnetic foils respectively.

REFERENCES:
patent: 6134188 (2000-10-01), Ganter et al.
patent: 2005/0018543 (2005-01-01), Fujisawa

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