Glass antenna device for a vehicle
AssigneeHitachi Cable, Ltd.
InventorsShinichi Takaba, Hitoshi Horita, Yuichi Anzai, Masayoshi Kaneyasu
Life of this patent
Estimating the term…
Abstract
An antenna element 1 is installed at a glass part 5 of a vehicle 4. The antennal element 1 has a ground part 3 and a radiating element 2. A metallic part side ground part 3b of the ground part 3 is overlapped with a metallic part 6 of the vehicle 4, while a glass part side ground part 3a of the ground part 3 and the radiating element 2 are not overlapped with the metallic part 6. The ground part 3 is installed such that a ratio of the area of the glass part side ground part 3a to be overlapped with the glass part 5 to the area of the metallic part side ground part 3b to be overlapped with the metallic part 6 is from 1:5 to 1:10.
Claims14
A glass antenna device for a vehicle, comprising:
- an antenna element to be installed at a glass part, the antenna element comprising:
- a rectangular ground part including a first part and a second part;
- and
- a radiating element comprising one side being in parallel with one side of the ground part, the radiating element being distant from the one side of the ground part by a predetermined spacing;
- wherein the first part of the ground part is configured to be overlapped with a conductive member;
- wherein the second part of the ground part includes the one side of the ground part and faces the radiating element,
- wherein the second part of the ground part is configured not to be overlapped with the conductive member, a longitudinal side of the radiating element being in parallel with a boundary between the first part and the second part, the longitudinal side of the radiating element extending the length of the radiating element,
- wherein the ground part has a rectangular shape, and the radiating element comprises a first part extending vertically from one side of the ground part and a second part extending from the first part in parallel with the one side of the ground part,
- wherein the second part of the radiating element comprises two resonant parts having resonant frequencies different from each other,
- wherein at least one of the two resonant parts comprises a narrow width part and a wide width part in a longitudinal direction,
- and wherein the wide width part extends beyond one end of the ground part.
A vehicle provided with a glass antenna device, comprising:
- a glass part;
- a metallic part;
- and
- an antenna element installed at a glass part, the antenna element comprising:
- a rectangular ground part including a first part, and a second part;
- and
- a radiating element comprising one side being in parallel with one side of the ground part, the radiating element being distant from the one side of the ground part by a predetermined spacing,
- wherein the first part of the ground part is configured to be overlapped with a conductive member,
- wherein the second part of the ground part includes the one side of the ground part and faces the radiating element,
- wherein the second part of the ground part is configured to be not overlapped with the metallic part, a longitudinal side of the radiating element being in parallel with a boundary between the first part and the second part, the longitudinal side of the radiating element extending the length of the radiating element,
- wherein the ground part has a rectangular shape, and the radiating element comprises a first part extending vertically from one side of the ground part and a second part extending from the first part in parallel with the one side of the ground part,
- wherein the second part of the radiating element comprises two resonant parts having resonant frequencies different from each other,
- wherein at least one of the two resonant parts comprises a narrow width part and a wide width part in a longitudinal direction,
- and wherein the wide width part extends beyond one end of the ground part.
Dependencies are inferred from the claim text.