Antenna device
First Claim
1. An antenna device comprising:
- a first dielectric substrate having a patch conductor disposed thereon; and
a second dielectric substrate confronting the first dielectric substrate and having a grounding conductor disposed on a substrate surface confronting the patch conductor;
wherein the second dielectric substrate is disposed on a spacer disposed on the first dielectric substrate; and
the second dielectric substrate and the first dielectric substrate are separated from each other by a distance by the spacer, the space being interposed between the second dielectric substrate and the first dielectric substrate.
2 Assignments
0 Petitions
Accused Products
Abstract
A antenna device, which includes a first dielectric substrate having a patch conductor disposed thereon; a second dielectric substrate having a grounding conductor disposed on a confronting substrate surface confronting the patch conductor; and a conductor for electromagnetic coupling, extending from the confronting substrate surface of the second dielectric substrate toward the first dielectric substrate, is provided. The antenna device is small and is capable of being mounted to a windowpane for a vehicle since the conductor for electromagnetic coupling is not connected to the grounding conductor with respect to a direct current and since the conductor for electromagnetic coupling and the patch conductor are electromagnetically coupled each other.
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Citations
67 Claims
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1. An antenna device comprising:
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a first dielectric substrate having a patch conductor disposed thereon; and
a second dielectric substrate confronting the first dielectric substrate and having a grounding conductor disposed on a substrate surface confronting the patch conductor;
wherein the second dielectric substrate is disposed on a spacer disposed on the first dielectric substrate; and
the second dielectric substrate and the first dielectric substrate are separated from each other by a distance by the spacer, the space being interposed between the second dielectric substrate and the first dielectric substrate. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 45, 46, 49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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3. An antenna device having a microstrip antenna, comprising a patch conductor, a second dielectric substrate and a grounding conductor, the patch conductor being disposed on an interior surface of a windowpane for a vehicle as a first dielectric substrate or on a dielectric film disposed on an interior surface of a windowpane for a vehicle as a first dielectric substance, the second dielectric substrate being disposed so as to be apart from the windowpane by a distance so as to confront the patch conductor, and the grounding conductor being disposed on the second dielectric substrate;
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wherein when a radio wave to be used in communication has a wavelength of λ
0 in air, and when a shortest distance between the patch conductor and an edge of an opening of a vehicle body is D,the formula of 0.01≦
D/λ
0 is established; and
wherein a shortest distance between a portion of the antenna device farthest from the edge of the opening of the vehicle body and the edge of the opening of the vehicle body is 200 mm or below. - View Dependent Claims (4)
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40. An antenna device having a microstrip antenna, comprising a patch conductor, an insulating sheet or insulating substrate and a grounding conductor, the patch conductor being disposed on an interior surface of a windowpane for a vehicle as a first dielectric substrate or on a dielectric film disposed on an interior surface of a windowpane for a vehicle as a first dielectric substrate, the insulating sheet or insulating substrate being disposed on the windowpane so as to confront the patch conductor, and the grounding conductor being disposed on the insulating sheet or insulating substrate;
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wherein when a radio wave to be used in communication has a wavelength of λ
0 in air, and when a shortest distance between the patch conductor and an edge of an opening of a vehicle body is D,the formula of 0.01≦
D/λ
0 is established; and
wherein a shortest distance between a portion of the antenna device farthest from the edge of the opening of the vehicle body and the edge of the opening of the vehicle body is 200 mm or below. - View Dependent Claims (41, 42, 43, 44, 47, 48, 50)
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Specification