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US 6,271,800 B1Granted
Circularly polarized cross dipole antenna
OwnerTakashi Nakamura, Koji Nishidainventors
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Abstract
A circularly polarized cross dipole antenna according to the present invention includes a cross dipole antenna element formed of two pairs of inverted-V-shaped dipole antenna elements, which are bent like an inverted “V” at a set angle, so as to cross each other on a ground plane, and a feeding mechanism provided to perform a single-point feed through a feeding section common to the inverted-V-shaped dipole antenna elements of the cross dipole antenna element.
Claims1
A circularly polarized cross dipole antenna comprising:
- a cross dipole antenna element formed of two pairs of inverted-V-shaped dipole antenna elements, which are bent like an inverted “V” at a set angle and arranged so as to cross each other on a ground plane;
- and
- a feeding mechanism provided to perform a single-point feed through a feeding section common to the inverted-V-shaped dipole antenna elements of the cross dipole antenna element, wherein each of the inverted-V-shaped dipole antenna elements comprises:
- a pole portion standing vertically on the ground plane;
- an arm portion one end of which is rotatably coupled to a top of the pole portion by a pivot mechanism and another end of which is provided so as to move close to or away from the ground plane in a region closer to the ground plane than the one end of the arm portion;
- and
- a plate-shaped insulating support member, slidably fitted on the pole portion and fixed at a predetermined level of the pole portion, for supporting the arm portion at a predetermined angle by supporting the arm portion from below on a periphery of the insulating member.
4 more elements
Dependencies are inferred from the claim text.