Semicircular radial antenna
AssigneeHitachi Kokusai Electric Inc.
InventorsIichi Wako, Hisamatsu Nakano, Yusuke Yamamoto
Life of this patent
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Abstract
At least one of the following requirements is satisfied. A position of a curvature center of an arcuate portion in at least one of waveguide plates is selected between a connecting member and a power feeder, in accordance with a desired horizontal beam radiation characteristic. A curvature radius of the arcuate portion in at least one of the waveguide plates is selected in accordance with a desired vertical beam radiation characteristic. A slanted angle of a peripheral face of the arcuate portion, which connects a top face and a bottom face of each waveguide plate, in at least one of the waveguide plates is selected in accordance with a desired vertical beam radiation characteristic.
Claims24
A semicircular radial antenna, comprising:
- a pair of semicircular waveguide plates, having a pair of linear edge portions, an arcuate edge portion defined between the linear edge portions, the waveguide plates spaced from each other in a vertical direction;
- a connecting member, which physically and electrically connects at least a part of the linear edge portions in each waveguide plate;
- a power feeder, provided between the waveguide plates while being spaced from the connecting member,
- wherein at least one of the following requirements is satisfied:
- i) a position of a curvature center of the arcuate portion in at least one of the waveguide plates is selected between the connecting member and the power feeder, in accordance with a desired horizontal beam radiation characteristic;
- ii) a curvature radius of the arcuate portion in at least one of the waveguide plates is selected in accordance with a desired vertical beam radiation characteristic;
- and
- iii) a slanted angle of a peripheral face of the arcuate portion, which connects a top face and a bottom face of each waveguide plate, in at least one of the waveguide plates is selected in accordance with a desired vertical beam radiation characteristic.
Dependencies are inferred from the claim text.