Title:
ANTENNA DEVICE AND ELECTRONIC TIMEPIECE
Document Type and Number:
Japanese Patent JP2023178372
Kind Code:
A
Abstract:
To provide a compact antenna device capable of appropriately receiving radio waves of a plurality of frequencies, and an electronic timepiece.SOLUTION: An antenna device includes: an annular bezel (11); a grounding back cover (3) located on a plane in parallel to the bezel (11); metallic members (14a, 14b) that are not electrically connected to the bezel (11), are located at a height position between the bezel (11) and the back cover (3), and face the bezel (11) and the back cover (3), respectively; and power supply terminals (12) connected to the bezel (11) at a power supply point. The power supply point is located in a range in the vicinity of a boundary between a first region including a 12:06 o'clock direction and a second region including a 3:09 o'clock direction. The metallic members (14a, 14b) are located at at least one of the first region and the second region corresponding to different first frequency and second frequency, respectively, and make characteristics related to an electric capacity between the bezel (11) and the back cover (3) different between the first region and the second region.SELECTED DRAWING: Figure 2
Inventors:
SANO TAKASHI
Application Number:
JP2023177276A
Publication Date:
December 14, 2023
Filing Date:
October 13, 2023
Export Citation:
Assignee:
CASIO COMPUTER CO LTD
International Classes:
G04R60/08; G04C9/00; G04G21/04; H01Q1/44; H01Q5/385; H01Q13/08
Attorney, Agent or Firm:
Koyo International Patent Office
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