Planar, phased array antenna
First Claim
1. A planar, phased array antenna for receiving circularly polarized and linearly polarized waves, said antenna comprising:
- a ground plate;
a signal plate including(a) a plurality of active elements, wherein each active element is in the shape of a parallelogram having parallel, opposed edges, and(b) conductive branches electrically connecting said active elements in mirror symmetrical pairs, wherein each conductive branch is connected to a corner of an active element;
an aperture plate having a plurality of apertures aligned with said active elements and arranged in a first array and in a second array;
wherein the opposed edges of one active element in each pair of active elements are parallel to a diagonal of the aperture to which the one active element is electromagnetically coupled;
the corresponding opposed edges of the other active element in each pair are perpendicular to the corresponding diagonal of the aperture to which the other active element is electromagnetically coupled; and
the apertures in said first array are rotated 90°
with respect to the apertures in said second array.
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Accused Products
Abstract
A planar, phased array antenna includes a ground plate, a signal plate having a plurality of hollow active elements and conductive branches electrically connecting said active elements in mirror symmetrical pairs, an aperture plate having a plurality of apertures oriented in the same direction and aligned with said active elements to provide electromagnetic coupling between each active element and the corresponding aperture, and spacers between the plates. The ground plate is formed on a first spacer, e.g. by screen printing, and the aperture plate is formed on the other spacer, e.g. by screen printing. The signal plate includes an insulating substrate and a patterned conductive layer on said substrate. Alternatively, the aperture plate is separate from the other spacer and includes an insulating substrate and a patterned conductive layer on the substrate.
50 Citations
8 Claims
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1. A planar, phased array antenna for receiving circularly polarized and linearly polarized waves, said antenna comprising:
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a ground plate; a signal plate including (a) a plurality of active elements, wherein each active element is in the shape of a parallelogram having parallel, opposed edges, and (b) conductive branches electrically connecting said active elements in mirror symmetrical pairs, wherein each conductive branch is connected to a corner of an active element; an aperture plate having a plurality of apertures aligned with said active elements and arranged in a first array and in a second array; wherein the opposed edges of one active element in each pair of active elements are parallel to a diagonal of the aperture to which the one active element is electromagnetically coupled; the corresponding opposed edges of the other active element in each pair are perpendicular to the corresponding diagonal of the aperture to which the other active element is electromagnetically coupled; and the apertures in said first array are rotated 90°
with respect to the apertures in said second array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification