Electronically scanned hemispheric antenna
First Claim
Patent Images
1. An antenna comprising:
- first, second and third phased array radiators (hereafter “
radiators”
), each of said radiators having an axis that is normal to the radiator, each radiator having a scan angle substantially equal to ±
60 degrees relative to each radiator'"'"'s center axis, the radiators being positioned on the circumference of a geometric circle.
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Abstract
A low-profile, electronically scanned antenna that can scan a hemisphere is comprised of three, phased array radiators. Each radiator face has an azimuth and elevation scan angle equal to 120 degrees. The three radiator faces are arranged in a truncated 3 sided pyramid such that they prove continuous hemispherical coverage. The three radiators are mounted to cooled panels of a truncated pyramid-shaped frame such that the radiators enable a full hemisphere to be scanned by radar.
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Citations
28 Claims
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1. An antenna comprising:
first, second and third phased array radiators (hereafter “
radiators”
), each of said radiators having an axis that is normal to the radiator, each radiator having a scan angle substantially equal to ±
60 degrees relative to each radiator'"'"'s center axis, the radiators being positioned on the circumference of a geometric circle.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15)
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10. An antenna comprising:
first, second and third phased array planar radiators (hereafter “
radiators”
), each of said planar radiators having a center axis that is normal to the radiator, each radiator having an azimuth scan angle substantially equal to ±
60 degrees relative to each radiator'"'"'s center axis, and each radiator has a vertical scan angle substantially equal to ±
60 degrees relative to each radiator'"'"'s center axis, the radiators being positioned on the circumference of a geometric circle.- View Dependent Claims (12)
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16. An antenna comprising:
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first, second and third planar arrays, each of said planar arrays being substantially planar and having a geometric center axis that extends substantially perpendicular from the geometric center of a radiating face of each radiator, each radiator having vertical and azimuth scan angles that are both substantially equal to ±
60 degrees relative to each radiator'"'"'s center axis, the planar arrays being positioned on the circumference of a geometric circle; andfirst, second and third, radar-signal transmissive radomes extending over the radiating faces of the first, second and third planar arrays respectively such that the planar arrays are behind the radomes and the radomes are mechanically supported by the planar arrays. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. An antenna comprising:
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first, second and third phased array radiators (hereafter “
radiators”
), each of said radiators being substantially planar and having a electromagnetic signal radiating face having geometric center axis that extends perpendicularly from the geometric center of the radiating face of each radiator, each radiator having a vertical and azimuth scan angle substantially equal to ±
60 degrees relative to each radiator'"'"'s center axis;first, second and third, radar-signal transmissive radomes that conform to and which extend over the radiating faces of the first, second and third radiators respectively such that the radiators are behind the radomes, the radomes being mechanically supported by the radiators; and a three-sided, truncated-pyramidal-shaped fairing having first, second and third inclined faces that receive the first, second and third radomes. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification