Electronic apparatus
An electronic apparatus includes a display; and an antenna including a first element without power feeding that is a structural component made of metal and is disposed on the display or above a display surface of the display in a display direction, a second element which is disposed below the first element and is connected to a power supply, and a GND plate that is disposed below the second element, wherein the first element and the second element are electromagnetically coupled.
1. An electronic apparatus comprising:
a case body which is configured to be worn on a body of a user;
a display which is disposed in the case body;
a first element which is made of metal and is disposed outside the case body;
a circuit board which includes a ground pattern and is disposed in the case body; and
a second element which has an antenna electrode arranged proximate to a first end of the second element, and a power supply electrode arranged between the antenna electrode and a second end of the second element, and is disposed in the case body, wherein the antenna electrode is electrically connected to the ground pattern of the circuit board,
wherein the first element is disposed above the circuit board and the display along a direction, and the second element is disposed above the circuit board and below the first element along the direction.
2. The electronic apparatus according to claim 1 ,
wherein the first element and the second element are electromagnetically coupled without a radiation element between the first element and the second element.
3. The electronic apparatus according to claim 1 ,
wherein when λ is a wavelength of the electric wave received from a satellite, an equivalent electrical length of the second element is shorter than λ/4.
4. The electronic apparatus according to claim 1 ,
wherein the first element is an annular shape.
5. The electronic apparatus according to claim 1 ,
wherein when λ is a wavelength of the electric wave received from a satellite, an equivalent electrical length after the first element and the second element are electromagnetically coupled is λ/4, or an integer multiple of λ/4.
6. The electronic apparatus according to claim 1 ,
wherein the first element and the second element are disposed so as to overlap each other along the direction.
7. The electronic apparatus according to claim 1 ,
wherein when d is a distance between the first element and the second element,
0.5 mm≤d≤2.0 mm is satisfied.
8. The electronic apparatus according to claim 1 ,
wherein when H 1 is a distance between the circuit board and the first element along the direction,
4.0 mm≤H 1 ≤8.0 mm is satisfied.
9. The electronic apparatus according to claim 1 ,
wherein when λ is a wavelength of the electric wave received from a satellite, an equivalent electrical length of the second element is λ/4×about 0.7.
10. The electronic apparatus according to claim 1 ,
wherein the first element is a bezel or a ring-shaped dial ring.
11. The electronic apparatus according to claim 1 ,
wherein the second element receives microwaves from 300 MHz to 3 THz.
12. The electronic apparatus according to claim 1 ,
wherein the second element is a circular arc shape.
13. The electronic apparatus according to claim 1 ,
wherein the first element is an annular shape, a circular arc shape, or a rectangular frame shape.
14. The electronic apparatus according to claim 1 ,
wherein the display is a digital-type or a pointer-type.
15. An electronic apparatus comprising:
a case body having an interior space;
a ring-shaped conductive material without power feeding is disposed out of the interior space;
a display which is disposed in the interior space;
a circuit board which is disposed in the interior space;
a receiver mounted on the circuit board;
an inverted F antenna mounted on the circuit board and electrically connected to the receiver,
wherein the inverted F antenna includes an antenna electrode arranged proximate to a first end of the inverted F antenna and connected to a ground pattern of the circuit board, and a power supply electrode arranged between the antenna electrode and a second end of the inverted F antenna, and the ring-shaped conductive material is disposed above the circuit board and the display along a direction, and the inverted F antenna is disposed below the ring-shaped conductive material along the direction.
16. The electronic apparatus according to claim 15 ,
wherein the ring-shaped conductive material is a bezel.
17. The electronic apparatus according to claim 15 ,
wherein the ring-shaped conductive material and the inverted F antenna are electromagnetically coupled.
18. The electronic apparatus according to claim 15 ,
wherein when λ is a wavelength of the electric wave received from a satellite, an equivalent electrical length after the ring-shaped conductive material and the inverted F antenna are electromagnetically coupled is λ/4, or an integer multiple of λ/4.
19. The electronic apparatus according to claim 15 ,
wherein the ring-shaped conductive material and the inverted F antenna are disposed so as to overlap each other along the direction where the display and the circuit board overlap.
20. The electronic apparatus according to claim 15 ,
wherein when d is a distance between the ring-shaped conductive material and the inverted F antenna along the direction,
0.5 mm≤d≤2.0 mm is satisfied.
21. The electronic apparatus according to claim 15 ,
wherein when H 1 is a distance between the circuit board and the ring-shaped conductive material along the direction,
4.0 mm≤H 1 ≤8.0 mm is satisfied.
22. The electronic apparatus according to claim 15 ,
wherein when λ is a wavelength of the electric wave received from a satellite, an equivalent electrical length of the inverted F antenna is λ/4×about 0.7.
23. The electronic apparatus according to claim 15 , wherein the inverted F antenna is a circular arc shape.