Steerable beam helix antenna
First Claim
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1. A helix antenna comprising a conductor secured to a dielectric sheet, the dielectric sheet being furled so that the conductor is of generally helical form, said dielectric sheet being furlable and unfurlable to alter the characteristics of the antenna;
- wherein the dielectric sheet is rotationally furled or unfurled by rotating an outer side of the dielectric sheet relative to an inner side, and wherein the inner side of the dielectric sheet being secured to a central tube and the outer side of the dielectric sheet being secured to a radome surrounding the antenna, and wherein said dielectric sheet is furled and unfurled by relative rotation of the radome with respect to the central tube.
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Abstract
A variable helix antenna consisting of one or more conductors affixed to a furled dielectric sheet. The antenna beam being steerable by furling and unfurling of the dielectric sheet either rotationally, axially or by a combination of both. Multiple interleaved dielectric sheets may be used for multifilar embodiments and matching and compensation elements may also be provided on the dielectric sheet.
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Citations
10 Claims
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1. A helix antenna comprising a conductor secured to a dielectric sheet, the dielectric sheet being furled so that the conductor is of generally helical form, said dielectric sheet being furlable and unfurlable to alter the characteristics of the antenna;
- wherein the dielectric sheet is rotationally furled or unfurled by rotating an outer side of the dielectric sheet relative to an inner side, and wherein the inner side of the dielectric sheet being secured to a central tube and the outer side of the dielectric sheet being secured to a radome surrounding the antenna, and wherein said dielectric sheet is furled and unfurled by relative rotation of the radome with respect to the central tube.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Specification