Vehicle antenna and window glass for vehicle
A vehicle antenna arranged on a window glass for vehicle includes an element portion having a shape of a crank and being formed by a first element, a second element and a third element; and a feeding portion configured to feed power to the element portion. The first element has a first upper end portion and a first lower end portion, and extends in an up-down direction of the window glass. The second element has a second upper end portion and a second lower end portion, and extends in the up-down direction of the window glass. The third element extends between the first lower end portion and the second upper end portion. A first distance between the first lower end portion and the window glass is different from a second distance between the second upper end portion and the window glass.
1. A vehicle antenna arranged on a window glass for a vehicle, the vehicle antenna comprising:
a conductive element having a shape of a crank handle and being formed by a first element, a second element and a third element, wherein the conductive element includes
a first conductor portion; and
a second conductor portion located inward in an in-plane direction with respect to the first conductor portion spaced by a slot,
the slot being formed so as to range over the first element, the second element and the third element; and
a feeding portion configured to feed power to the conductive element,
the first element having a first upper end portion and a first lower end portion, and extending in an up-down direction of the window glass, wherein the feeding portion is located at the first upper end portion,
the second element having a second upper end portion and a second lower end portion, and extending in the up-down direction of the window glass,
the third element extending between the first lower end portion and the second upper end portion, and
a first distance between the first lower end portion and the window glass being different from a second distance between the second upper end portion and the window glass.
2. The vehicle antenna according to claim 1 ,
wherein the first distance is less than the second distance.
3. The vehicle antenna according to claim 1 ,
wherein a long-side direction of the conductive element is parallel to the up-down direction of the window glass.
4. The vehicle antenna according to claim 1 ,
wherein the slot includes a part in which a width increases along a direction from the first upper end portion toward the second element.
5. The vehicle antenna according to claim 1 ,
wherein a shape of an inner contour of the first conductor portion is an ellipse, and
wherein a shape of a contour of the second conductor portion is an ellipse.
6. The vehicle antenna according to claim 1 ,
wherein the feeding portion is located on the third element.
7. The vehicle antenna according to claim 6 ,
wherein the third element is separated by a gap into a first partial element and a second partial element.
8. The window glass for the vehicle provided with the vehicle antenna according to claim 1 .
9. The vehicle antenna according to claim 1 , wherein the first element and the second element are configured to extend parallel to a vehicle interior side surface of the window glass by extending in the up-down direction of the window glass.
10. A vehicle antenna arranged on a window glass for a vehicle, the vehicle antenna comprising:
a conductive element having a shape of a crank handle and being formed by a first element, a second element and a third element; and
a feeding portion configured to feed power to the conductive element,
the first element having a first upper end portion and a first lower end portion, and extending in an up-down direction of the window glass,
the second element having a second upper end portion and a second lower end portion, and extending in the up-down direction of the window glass,
the third element extending between the first lower end portion and the second upper end portion, and
a first distance between the first lower end portion and the window glass being different from a second distance between the second upper end portion and the window glass,
wherein a length of a component in a direction normal to a surface of the window glass of the third element falls within a range from 0.013λ, to 0.096λ, λ being a wavelength of electromagnetic waves at an operation frequency of the vehicle antenna.
11. The vehicle antenna according to claim 10 ,
wherein the first distance is less than the second distance.
12. The vehicle antenna according to claim 10 ,
wherein a long-side direction of the conductive element is parallel to the up-down direction of the window glass.
13. The vehicle antenna according to claim 10 ,
wherein the feeding portion is located at the first upper end portion.
14. The vehicle antenna according to claim 13 , wherein the conductive element includes
a first conductor portion; and
a second conductor portion located inward in an in-plane direction with respect to the first conductor portion spaced by a slot,
the slot being formed so as to range over the first element, the second element and the third element.
15. The vehicle antenna according to claim 14 ,
wherein the slot includes a part in which a width increases along a direction from the first upper end portion toward the second element.
16. The vehicle antenna according to claim 14 ,
wherein a shape of an inner contour of the first conductor portion is an ellipse, and
wherein a shape of a contour of the second conductor portion is an ellipse.
17. The vehicle antenna according to claim 10 ,
wherein the feeding portion is located on the third element.
18. The vehicle antenna according to claim 17 ,
wherein the third element is separated by a gap into a first partial element and a second partial element.
19. The window glass for the vehicle provided with the vehicle antenna according to claim 10 .
20. The vehicle antenna according to claim 10 , wherein the first element and the second element are configured to extend parallel to a vehicle interior side surface of the window glass by extending in the up-down direction of the window glass.