Window glass
The present invention provides a window glass near which an electronic device is disposed, the window glass including a glass plate, an antenna disposed on the glass plate, an electronic device that is disposed near the glass plate, and at least one linear canceller that is disposed on the glass plate and is configured to inhibit noise produced from the electronic device from being received by the antenna.
1. A window glass near which an electronic device is to be disposed, the window glass comprising:
a glass plate;
an antenna that is disposed on the glass plate and is configured to receive broadcast waves; and
at least one linear canceller that is disposed on the glass plate and is configured to inhibit noise produced from the electronic device from being received by the antenna.
2. The window glass according to claim 1 ,
wherein the canceller is disposed between the antenna and the electronic device.
3. The window glass according to claim 2 ,
wherein, in a case where broadcast waves received by the antenna have a wavelength of λ 1 to λ 2 and the glass plate has a wavelength shortening ratio of α,
a distance between the antenna and the canceller is 0.08*α*2 or more, and
a distance between the electronic device and the canceller is 0.08*α*2 or more.
4. The window glass according to claim 2 ,
wherein, in a case where broadcast waves received by the antenna have a center wavelength of λc and the glass plate has a wavelength shortening ratio of α,
a distance between the antenna and the canceller is (0.3±0.05)*α*λc, or
a distance between the electronic device and the canceller is (0.3±0.05)*α*λc.
5. The window glass according to claim 2 ,
wherein the canceller is disposed closer to the electronic device than an intermediate position between the antenna and the electronic device.
6. The window glass according to claim 1 ,
wherein, in a case where broadcast waves received by the antenna have a wavelength of λ 1 to λ 2 and the glass plate has a wavelength shortening ratio of α,
the canceller has a total length of λ 2 /2*α*1.06 or more.
7. The window glass according to claim 6 ,
wherein the canceller has a total length of λ 2 /2*α*1.16 or more.
8. The window glass according to claim 1 ,
wherein the canceller is disposed on the side of the electronic device opposite to the antenna.
9. The window glass according to claim 8 ,
wherein, in a case where broadcast waves received by the antenna have a wavelength of λ 1 to λ 2 and the glass plate has a wavelength shortening ratio of α,
a distance between the electronic device and the canceller is λ 1 /4*α or less.
10. The window glass according to claim 8 ,
wherein, in a case where broadcast waves received by the antenna have a wavelength of λ 1 to λ 2 and the glass plate has a wavelength shortening ratio of α,
the canceller has a total length of λ 1 /2*α*0.8 or less.
11. The window glass according to claim 1 ,
wherein the canceller has a linear first site and a linear second site that is joined to at least one end portion of the first site and is bent from the first site.
12. The window glass according to claim 11 , wherein the second site is bent toward the antenna.
13. The window glass according to claim 11 ,
wherein, in a case where broadcast waves received by the antenna have a wavelength of λ 1 to λ 2 and the glass plate has a wavelength shortening ratio of α,
the first site has a length of λ 2 /2*α or more.
14. The window glass according to claim 11 ,
wherein the second site is bent at an angle of −135 degrees to 135 degrees with respect to the first site.
15. The window glass according to claim 1 , comprising a plurality of the cancellers.
16. The window glass according to claim 1 , wherein the glass plate is formed using a laminated glass.
17. The window glass according to claim 1 , wherein the antenna is a digital television antenna.
18. The window glass according to claim 1 ,
wherein an angle at which a perpendicular line that extends perpendicularly to a line connecting a center of the antenna and a center of the electronic device on the glass plate intersects with the canceller is 15 degrees or less.