Portable radio-controlled watch
A portable radio-controlled watch includes a watch glass, an antenna that is formed on a backside of a circumference of the watch glass so as to be along the circumference, a feeder electrode adjacent to the antenna, a receiving circuit, an antenna connecting line that is at least a part of a connection circuit connecting the feeder electrode with the receiving circuit, where the antenna connecting line is directly connected to a back surface of the feeder electrode and extends in a direction away from the watch glass, and a dielectric that is disposed below the antenna and covers at least a part of the antenna in a plan view.
1. A portable radio-controlled watch comprising:
a watch glass;
an antenna that is disposed on a surface of a circumference of the watch glass;
a feeder electrode that is adjacent to the antenna on one side of the watch glass and in a direction perpendicular to a thickness direction of the antenna;
a receiving circuit;
an antenna connecting line that is at least a part of a connection circuit connecting the feeder electrode with the receiving circuit, the antenna connecting line being electrically connected to the feeder electrode and extending in a direction away from the watch glass;
a dielectric that is disposed near the antenna and covers at least a part of the antenna in a plan view; and
wherein the antenna and the feeder electrode are capacitively coupled.
2. The portable radio-controlled watch according to claim 1 , wherein
the antenna includes a first part that is adjacent to the feeder electrode and a second part that is not adjacent to the feeder electrode, and a width of the first part is smaller than a width of the second part.
3. The portable radio-controlled watch according to claim 1 , wherein
the antenna is not disposed on the circumference side of an area of the feeder electrode and on a side opposite to the area of the feeder electrode, where the area of the feeder electrode is in contact with the antenna connecting line.
4. The portable radio-controlled watch according to claim 1 , wherein
the antenna is disposed closer to the circumference side of the watch glass than the feeder electrode.
5. The portable radio-controlled watch according to claim 1 , wherein
the feeder electrode is disposed closer to the circumference side of the watch glass than the antenna.
6. The portable radio-controlled watch according to claim 5 , further comprising a bezel or a body into which the watch glass is fitted, wherein
the bezel or the body has a notch at a position opposite to the antenna connecting line.
7. The portable radio-controlled watch according to claim 1 , further comprising a bezel into which the watch glass is fitted, wherein
the dielectric is a part of the bezel and disposed immediately below the antenna.
8. The portable radio-controlled watch according to claim 1 , further comprising a bezel into which the watch glass is fitted, wherein
the dielectric is a part of the bezel, and an insulating member is disposed between the antenna and the dielectric.
9. The portable radio-controlled watch according to claim 1 , further comprising:
a bezel into which the watch glass is fitted and including a dielectric disposed below the antenna; and
a high dielectric member that is disposed between the dielectric and the antenna, and has a higher permittivity than the dielectric.
10. The portable radio-controlled watch according to claim 1 , further comprising a bezel into which the watch glass is fitted and including a metal member and a dielectric member.
11. The portable radio-controlled watch according to claim 1 , further comprising a hiding member between the antenna and the watch glass.
12. The portable radio-controlled watch according to claim 1 , wherein
the circumference of the watch glass is inclined at a front side.
13. A portable radio-controlled watch comprising:
a watch glass;
an antenna that is disposed on a surface of a circumference of the watch glass;
a feeder electrode that is adjacent to the antenna on one side of the watch glass and in a direction perpendicular to a thickness direction of the antenna;
a receiving circuit;
an antenna connecting line that is at least a part of a connection circuit connecting the feeder electrode with the receiving circuit, the antenna connecting line being electrically connected to the feeder electrode and extending in a direction away from the watch glass;
a dielectric that is disposed near the antenna and covers at least a part of the antenna in a plan view; and
wherein the antenna and the feeder electrode are wirelessly connected.