Radio wave lens antenna
First Claim
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1. A radio wave lens antenna comprising:
- a hemispherical radio wave lens for focusing radio wave beams;
a reflective plate attached to a half-cut surface of the sphere of the radio wave lens for reflecting radio waves incoming from the sky or radiated toward targets; and
primary feeds positioned at arbitrary radio wave focus points of the radio wave lens for transmitting or receiving the radio waves,wherein the primary feeds include at least one pair of primary feeds installed closely and each of the two closely disposed primary feeds includes a dielectric loaded waveguide antenna where a dielectric body is loaded at an end opening of a waveguide, a center of the end of the dielectric body being located off the extension of the waveguide'"'"'s center axis and the centers of the ends of the dielectric bodies of the two closely disposed primary feeds being disposed at off-centered positions such that the centers are remotely spaced apart from each other.
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Abstract
A multi-beam lens antenna for individual communication with communication satellites spaced at small elongations. The multi-beam antenna comprises primary feeds 3 each of which is composed of a waveguide having an opening at the end and a dielectric body 6 disposed at the end, a hemispherical Luneberg radio wave lens, and a reflective plate attached to the circular opening of the hemispherical radio wave lens and adapted for reflecting a radio wave incoming from the sky or emitted toward a target. The waveguides are preferably rectangular waveguides 4 rather than circular waveguides 5. The dielectric bodies 6 are preferably tapered.
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Citations
20 Claims
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1. A radio wave lens antenna comprising:
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a hemispherical radio wave lens for focusing radio wave beams; a reflective plate attached to a half-cut surface of the sphere of the radio wave lens for reflecting radio waves incoming from the sky or radiated toward targets; and primary feeds positioned at arbitrary radio wave focus points of the radio wave lens for transmitting or receiving the radio waves, wherein the primary feeds include at least one pair of primary feeds installed closely and each of the two closely disposed primary feeds includes a dielectric loaded waveguide antenna where a dielectric body is loaded at an end opening of a waveguide, a center of the end of the dielectric body being located off the extension of the waveguide'"'"'s center axis and the centers of the ends of the dielectric bodies of the two closely disposed primary feeds being disposed at off-centered positions such that the centers are remotely spaced apart from each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio wave lens antenna comprising:
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a spherical radio wave lens for focusing radio wave beams; and primary feeds positioned at arbitrary radio wave focus points of the radio wave lens for transmitting or receiving the radio waves, wherein the primary feeds include at least one pair of primary feeds installed closely and each of the two closely disposed primary feeds includes a dielectric loaded waveguide antenna where a dielectric body is loaded at an end opening of a waveguide, a center of the end of the dielectric body being located off the extension of the waveguide'"'"'s center axis and the centers of the ends of the dielectric bodies of the two closely disposed primary feeds being disposed at off-centered positions such that the centers are remotely spaced apart from each other. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification