ANTENNA DEVICE

摘要

An antenna device mounted on a roof surface of a vehicle roof includes a ground plate disposed on the roof surface, an antenna ground, a first antenna element, and a second antenna element. The antenna ground is disposed on a plane perpendicular to the ground plate apart from a ground plate surface by a predetermined distance in a direction perpendicular to the ground plate surface. The first antenna element, whose first base end portion is connected to a first predetermined position of the antenna ground, extends from the first base end portion to a first front end portion in a direction moving away from the antenna ground. The second antenna element, whose second base end portion is connected to a second predetermined position of the antenna ground, extends from the second base end portion to a second front end portion in a direction moving away from the antenna ground.

主权项

1. An antenna device mounted on a roof surface of a vehicle roof comprising:
a ground plate disposed on the roof surface; an antenna ground having a planar shape, the antenna ground being disposed on a plane that is perpendicular to a ground plate surface of the ground plate or being angled with the ground plate surface of the ground plate within a predetermined angle, and the antenna ground being disposed apart from the ground plate surface of the ground plate by a predetermined distance in a direction perpendicular to the ground plate surface of the ground plate; a first antenna element having a first base end portion and a first front end portion, the first base end portion being connected to a first predetermined position of the antenna ground, and the first antenna element extending from the first base end portion to the first front end portion in a direction moving away from the antenna ground; and a second antenna element having a second base end portion and a second front end portion, the second base end portion being connected to a second predetermined position of the antenna ground, the second predetermined position being different from the first predetermined position, and the second antenna element extending from the second base end portion to the second front end portion in a direction moving away from the antenna ground.