Polarization-agile multi-octave linear array with hemispherical field-of-view
First Claim
Patent Images
1. A phased array antenna comprising:
- a phased array of radiating elements arranged in a predetermined pattern to radiate and receive RF signals in an antenna beam pattern that is steerable over a field of view; and
a divergent lens device configured and positioned with respect to said phased array to cause phase distortion and defocusing of the antenna beam pattern to thereby eliminate blind spots in the field of view.
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Abstract
An antenna including a plurality of radiating elements disposed in mutually orthogonal pairs arranged in a predetermined pattern to radiate and receive RF signals over multi-octave frequency bands; and divergent lens means to provide stability for the predetermined pattern of radiating elements.
12 Citations
24 Claims
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1. A phased array antenna comprising:
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a phased array of radiating elements arranged in a predetermined pattern to radiate and receive RF signals in an antenna beam pattern that is steerable over a field of view; and a divergent lens device configured and positioned with respect to said phased array to cause phase distortion and defocusing of the antenna beam pattern to thereby eliminate blind spots in the field of view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of eliminating blind spots in the field of view of a phased array antenna configured to radiate and receive RF signals in an antenna beam pattern that is steerable over the field of view, the method comprising the step of:
defocusing the antenna beam pattern with divergent lenses, thereby eliminating grating lobe nulls that would otherwise occur in the antenna beam pattern at certain scan angles.
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20. A phased array antenna, comprising:
a plurality of phased-array radiating elements configured to radiate and receive RF signals in an antenna beam pattern that is steerable over a field of view, said radiating elements being arranged in a herringbone pattern about an array scan axis. - View Dependent Claims (21, 22, 23, 24)
Specification