Electromagnetic lens array antenna device
AssigneeSumitomo Electric Industries, Ltd.
InventorsKatsuyuki Imai, Masatoshi Kuroda
Life of this patent
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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.
Claims21
1-10. (canceled)
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 each primary feed includes a dielectric-loaded waveguide antenna where a dielectric body is loaded at an end opening of a waveguide and two of the primary feeds are installed closely and centers of the ends of the dielectric bodies of the two closely disposed primary feeds are disposed at off-centered positions in a direction that the centers are remotely spaced apart from each other to be located off the extension of each waveguide's center axis.
A radio wave lens antenna comprising:
- 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 each primary feed includes a dielectric-loaded waveguide antenna where a dielectric body is loaded at an end opening of a waveguide and two of the primary feeds are installed closely and centers of the ends of the dielectric bodies of the two closely disposed primary feeds are disposed at off-centered positions in a direction that the centers are remotely spaced apart from each other to be located off the extension of each waveguide's center axis.
The radio wave lens antenna of claim 1 1, wherein the dielectric body is protruded forward from the waveguide and a part of an outer periphery of a protruded portion of the dielectric body is removed along a plane of a direction intersecting a cross section of the waveguide.
Dependencies are inferred from the claim text.