Planar antenna apparatus
First Claim
Patent Images
1. An antenna apparatus comprising:
- a dielectric substrate;
a planar antenna element disposed on the substrate; and
a waveguide for propagating electromagnetic waves to or from the planar antenna element,wherein the waveguide comprises at least a first conductor and a second conductor extending along each other, and near a connection portion formed between the first and second conductors and the planar antenna element, there is provided a taper region in which a distance between mutually-facing edge portions of the first conductor and the second conductor increases approximately monotonically toward the planar antenna element.
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Abstract
An antenna apparatus including a dielectric substrate, a planar antenna element disposed on the substrate, and a waveguide for propagating electromagnetic waves to or from the planar antenna element. The waveguide includes at least a first conductor and a second conductor extending along each other. Near a connection portion formed between the first and second conductors and the planar antenna element, there is provided a taper region in which a distance between mutually-facing edge portions of the first conductor and the second conductor increases approximately monotonically toward the planar antenna element.
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Citations
8 Claims
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1. An antenna apparatus comprising:
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a dielectric substrate; a planar antenna element disposed on the substrate; and a waveguide for propagating electromagnetic waves to or from the planar antenna element, wherein the waveguide comprises at least a first conductor and a second conductor extending along each other, and near a connection portion formed between the first and second conductors and the planar antenna element, there is provided a taper region in which a distance between mutually-facing edge portions of the first conductor and the second conductor increases approximately monotonically toward the planar antenna element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An antenna apparatus comprising:
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a dielectric substrate; and a planar antenna element disposed on the substrate, wherein the planar antenna element comprises teardrop-shaped structures, each composed of a portion of an isosceles triangular shape with a vertical angle of a desired value and an arc of a circle inscribed in the isosceles triangle, arranged with their apexes facing each other.
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Specification