Conformal driveshaft cover SATCOM antenna
First Claim
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1. An antenna assembly, comprising:
- an arcuate-shaped dielectric substrate formed to fit a horizontal-driveshaft cover of a rotor assembly in a non-fixed-wing aircraft; and
a set of arcuate-shaped dipoles disposed on the dielectric substrate to conform to the arcuate shape thereof,wherein, the arcuate-shaped dipoles transceive an electromagnetic radiation pattern at a larger angle from a line perpendicular to a lengthwise dimension of the horizontal-driveshaft cover than an electromagnetic radiation pattern transceived by a set of substantially co-planar dipoles of a length equal to a length of the arcuate dipoles and placed in a plane parallel to the lengthwise dimension of the horizontal-driveshaft cover.
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Abstract
An antenna assembly (700) includes a set of conformal shells (704, 706) housing a set of orthogonal dipoles (102, 104, 108, 110) that produce a circularly polarized radiation pattern. The dipoles (102, 104, 108, 110) are fed by a quadrature hybrid (118) and impedance matching circuit (114). The assembly (700) also includes a set of baluns (126, 128) to reduce VSWR.
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Citations
20 Claims
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1. An antenna assembly, comprising:
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an arcuate-shaped dielectric substrate formed to fit a horizontal-driveshaft cover of a rotor assembly in a non-fixed-wing aircraft; and a set of arcuate-shaped dipoles disposed on the dielectric substrate to conform to the arcuate shape thereof, wherein, the arcuate-shaped dipoles transceive an electromagnetic radiation pattern at a larger angle from a line perpendicular to a lengthwise dimension of the horizontal-driveshaft cover than an electromagnetic radiation pattern transceived by a set of substantially co-planar dipoles of a length equal to a length of the arcuate dipoles and placed in a plane parallel to the lengthwise dimension of the horizontal-driveshaft cover. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An antenna assembly, comprising:
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a radome formed to fit an arcuate-shaped horizontal-driveshaft cover for a rotor assembly in a non-fixed-wing aircraft; and a set of arcuate-shaped dipoles disposed within the radome and shaped to conform to the arcuate-shaped horizontal-driveshaft cover, wherein, the arcuate-shaped dipoles transceive an electromagnetic radiation pattern at a larger angle from a line perpendicular to a lengthwise dimension of the horizontal-driveshaft cover than an electromagnetic radiation pattern transceived by a set of substantially co-planar dipoles of a length equal to a length of the arcuate dipoles and placed in a plane parallel to the lengthwise dimension of the horizontal-driveshaft cover. - View Dependent Claims (9, 10, 11, 12)
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13. A communication system for a non-fixed-wing aircraft having a rotor assembly with a horizontal driveshaft, the communication system comprising:
a radio connected to an antenna assembly, the antenna assembly including; an arcuate-shaped dielectric substrate formed to fit a horizontal-driveshaft cover of the rotor assembly; and a set of arcuate-shaped dipoles disposed on the dielectric substrate to conform to the arcuate shape thereof, wherein, the arcuate-shaped dipoles transceive an electromagnetic radiation pattern at a larger angle from a line perpendicular to a lengthwise dimension of the horizontal-driveshaft cover than an electromagnetic radiation pattern transceived by a set of substantially co-planar dipoles of a length equal to a length of the arcuate-shaped dipoles and placed in a plane parallel to the lengthwise dimension of the horizontal-driveshaft cover. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
Specification