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US 4,232,316 AGranted
Aircraft landing-guiding apparatus
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsEiichi Chaki, Taneaki Chiba, Tetsuo Sato
Life of this patent
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Abstract
An aircraft landing-guiding apparatus having an antenna system constituted by a plurality of antenna elements arranged in a line and intersecting the course of a runway substantially at right angles at the lengthwise center of the runway. Phases of sideband signals and carrier signals are shifted at rates having such relationship that sideband patterns and carrier patterns are sent forth from the antenna system at prescribed horizontal angles to the course of the runway.
Claims6
An aircraft landing-guiding apparatus comprising:
- an antenna system constituted by a plurality of antenna elements arranged on the lateral side of a runway and aligned in a direction intersecting its course substantially at a right angle for radiating a sideband pattern and carrier pattern from both sides alike;
- means for generating a sideband signal and carrier signal;
- and
- phase-shifting means coupled to each antenna element for shifting the phases of the sideband signal and carrier signal coupled thereto at a predetermined rate so as to cause the directionality of the sideband pattern and that of the carrier pattern to intersect the runway course at prescribed angles.
1 more element
Dependencies are inferred from the claim text.