Vehicle mounted antenna and antenna-mounted vehicle

1 . A vehicle-mounted antenna attached to a body of a vehicle, the vehicle-mounted antenna comprising:

a power supply pin disposed in an upright position on the body;

a first radiation element extending from the power supply pin along a first direction in a horizontal plane; and

a second radiation element extending from the power supply pin along a second direction opposite to the first direction in the horizontal plane,

wherein

a first tip portion of the first radiation element is fixed to the body via a first insulating member,

the second radiation element is longer than the first radiation element and comprises a second tip portion and an intermediate portion,

the second tip portion is electrically connected to the body,

the intermediate portion is located between the power supply pin and the second tip portion, and is fixed to the body via a second insulating member,

the second radiation element extends in a straight line shape along the second direction, and comprises:

a proximal portion connected to the power supply pin, and

a distal portion distant from the power supply pin, the distal portion has a thickness greater than a thickness of the proximal portion,

the intermediate portion is located on a distal portion side of the proximal portion, and

the second radiation element is configured to adjust an input impedance of the vehicle-mounted antenna.

2 . The vehicle-mounted antenna according to claim 1 , wherein

the first radiation element comprises an end segment extending downwardly from the first tip portion, and

the end segment is fixed to the body together with the first tip portion via the first insulating member.

3 . The vehicle-mounted antenna according to claim 1 , wherein

the distal portion extends from the intermediate portion further away from the power supply pin, and comprises the second tip portion.

4 . The vehicle-mounted antenna according to claim 3 , wherein

the first radiation element is a metal elongated strip-shaped plate member extending from an upper portion of the power supply pin toward a rear of the vehicle in the horizontal plane, and is configured to receive a horizontally polarized digital television (DTV) radio wave, and

the second radiation element is a metal elongated strip-shaped plate member extending from the upper portion of the power supply pin toward a front of the vehicle in the horizontal plane, and is configured to receive an electric wave of the DTV of a horizontal polarization.

5 . The vehicle-mounted antenna according to claim 4 , wherein

the first radiation element comprises an end segment extending downwardly from the first tip portion, and

the end segment is fixed to the body together with the first tip portion via the first insulating member.

6 . The vehicle-mounted antenna according to claim 5 , wherein

the first insulating member is of resin.

7 . The vehicle-mounted antenna according to claim 6 , wherein

the input impedance of the vehicle-mounted antenna is configured to be adjusted by

the thickness of the distal portion, and

a height from a lower side, from which the power supply pin extends in a vehicle upward direction, to an upper end surface of the distal portion.

8 . An antenna-mounted vehicle, comprising:

a body and an antenna, wherein

the body comprises a window opening and a window glass arranged in the window opening;

the window glass is provided with an opaque masking region at a peripheral portion of the window glass; and

the antenna is a vehicle-mounted antenna attached to the body so as to overlap with the masking region in a thickness direction of the window glass;

the vehicle-mounted antenna comprising:

a power supply pin disposed in an upright position on the body;

a first radiation element extending from the power supply pin along a first direction in a horizontal plane; and

a second radiation element extending from the power supply pin along a second direction opposite to the first direction in the horizontal plane,

wherein

a first tip portion of the first radiation element is fixed to the body via a first insulating member,

the second radiation element is longer than the first radiation element and comprises a second tip portion and an intermediate portion,

the second tip portion is electrically connected to the body,

the intermediate portion is located between the power supply pin and the second tip portion, and is fixed to the body via a second insulating member,

the second radiation element extends in a straight line shape along the second direction, and comprises:

a proximal portion connected to the power supply pin, and

a distal portion distant from the power supply pin, the distal portion being greater in thickness than the proximal portion,

the intermediate portion is located on a distal portion side of the proximal portion, and

the second radiation element is configured to adjust an input impedance of the vehicle-mounted antenna.

9 . The antenna-mounted vehicle according to claim 8 , wherein:

the power supply pin is disposed in the upright position on an upper edge or a lower edge of the window opening,

the first tip portion of the first radiation element is fixed to the upper edge or the lower edge of the window opening via the first insulating member,

the second tip portion is connected to a vertical edge of the window opening,

the intermediate portion is fixed to the upper edge or the lower edge of the window opening via the second insulating member, and

the power supply pin, the first radiation element, and the second radiation element are disposed so as to overlap the masking region in a thickness direction of the window glass.