Dielectric leaky wave antenna having mono-layer structure
First Claim
1. A dielectric leaky-wave antenna comprising:
- a ground plane;
a dielectric slab on one surface of said ground plane, which forms a transmission guide for transmitting an electromagnetic wave from one end side to another end side along a surface of said dielectric slab;
perturbations on the surface of said dielectric slab along the electromagnetic wave transmission direction of said transmission guide at predetermined intervals which leak the electromagnetic wave from the surface of said dielectric slab; and
a feed which supplies the electromagnetic wave to one end side of said transmission guide, wherein each of said perturbations comprise a metallic strip or a slot which has an angle of 45 degrees relative to the electromagnetic wave transmission direction of said transmission guide.
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Abstract
The present invention provides a dielectric leaky-wave antenna having a single-layer structure which is effective for realizing a highly efficient low-cost antenna in a quasi-millimeter wave zone in particular. This dielectric leaky-wave antenna includes a ground plane, a dielectric slab which is laid on one surface of the ground plane and forms a transmission guide for transmitting an electromagnetic wave from one end side to the other end side between itself and the ground plane along the surface, perturbations which are loaded on the surface of the dielectric slab along the electromagnetic wave transmission direction of the transmission guide at predetermined intervals and leak the electromagnetic wave from the surface of the dielectric slab, and a feed which supplies the electromagnetic wave to one end side of the transmission guide.
77 Citations
46 Claims
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1. A dielectric leaky-wave antenna comprising:
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a ground plane;
a dielectric slab on one surface of said ground plane, which forms a transmission guide for transmitting an electromagnetic wave from one end side to another end side along a surface of said dielectric slab;
perturbations on the surface of said dielectric slab along the electromagnetic wave transmission direction of said transmission guide at predetermined intervals which leak the electromagnetic wave from the surface of said dielectric slab; and
a feed which supplies the electromagnetic wave to one end side of said transmission guide, wherein each of said perturbations comprise a metallic strip or a slot which has an angle of 45 degrees relative to the electromagnetic wave transmission direction of said transmission guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A dielectric leaky-wave antenna comprising:
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a ground plane;
a dielectric slab on one surface of said ground plane, which forms a transmission guide for transmitting an electromagnetic wave from one end side to another end side along a surface of said dielectric slab;
perturbations on the surface of said dielectric slab along the electromagnetic wave transmission direction of said transmission guide at predetermined intervals which leak the electromagnetic wave from the surface of said dielectric slab; and
a feed which supplies the electromagnetic wave to one end side of said transmission guide, wherein said perturbations each has a length substantially equal to a width of said dielectric slab and comprise a metallic strip or a slot orthogonal to the electromagnetic wave transmission direction of said transmission guide, and wherein a pair of said perturbations are arranged in parallel to each other such that an interval along the electromagnetic wave transmission direction of said transmission guide becomes substantially ¼
of a wavelength of the electromagnetic wave in said transmission guide, said pair of perturbations being disposed along the electromagnetic wave transmission direction of said transmission guide at said predetermined interval.- View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
wherein said wave-front conversion section converts the cylindrical wave radiated from each of said radiators into a plane wave whose wave front is inclined at an angle corresponding to the phase center position of that radiator and supplies it to said transmission guide.
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32. A dielectric leaky-wave antenna comprising:
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a ground plane;
a dielectric slab on one surface of said ground plane, which forms a transmission guide for transmitting an electromagnetic wave from one end side to the other end side along a surface of said dielectric slab;
perturbations on the surface of said dielectric slab along the electromagnetic wave transmission direction of said transmission guide at predetermined intervals which leak the electromagnetic wave from the surface of said dielectric slab; and
a feed which supplies the electromagnetic wave to one end side of said transmission guide, wherein said perturbations are constituted by a metallic strip or a slot which has a 45°
angle relative to the electromagnetic wave transmission direction of said transmission guide, andwherein a pair of said perturbations are arranged in parallel to each other such that an interval along the electromagnetic wave transmission direction of said transmission guide becomes substantially ¼
of a wavelength of the electromagnetic wave in said transmission guide, said pair of perturbations being disposed along the electromagnetic wave transmission direction of said transmission guide at said predetermined interval.- View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
wherein said wave-front conversion section converts the cylindrical wave radiated from each of said radiators into a plane wave whose wave front is inclined at an angle corresponding to the phase center position of that radiator and supplies it to said transmission guide.
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Specification