Dual-polarization common aperture antenna with rectangular wave-guide fed centered longitudinal slot array and micro-stripline fed air cavity back transverse series slot array
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United States of America Patent
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May 4, 2004
Grant Date -
Mar 25, 2004
app pub date -
Jun 13, 2001
filing date -
Jun 13, 2001
priority date (Note) -
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Abstract
A dual-polarization common aperture antenna having fully populated common aperture dual polarized arrays. The inventive antenna includes a first and second arrays of radiating slots disposed in a faceplate. The second array is generally orthogonal and therefor cross-polarized relative to the first array. The first array is waveguide fed and the second array is stripline fed. In the illustrative implementation, the first array and the second array share a common aperture. The common aperture is fully populated and each array uses the aperture in its entirety. The first and second arrays of slots are arranged for four-way symmetry. Each slot in the first array is a vertically oriented, iris-excited shunt slot fed by a rectangular waveguide and centered on a broad wall thereof. The second array is a standing wave array in which each slot is an air cavity backed slot fed by an inverted micro-stripline offset from a center thereof.
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