Aperture Coupled Cavity Backed Patch Antenna
First Claim
Patent Images
1. An antenna array comprising:
- a plurality of stacked radiating elements, each stacked radiating element comprising a first rectangular patch radiator and a second rectangular patch radiator;
a printed circuit board disposed adjacent to each said fist rectangular patch radiator, said printed circuit board comprising a plurality of stubs and a ground plane;
said first rectangular patch radiator disposed between said second rectangular patch radiator and said printed circuit board;
a plurality of slots positioned within said ground plane, each slot being aligned with a respective stacked radiating element; and
a plurality of cavities enclosing said ground plane and respective slots whereby said stubs feed said slots and said slots excite respective cavities such that said patch radiators radiate RF energy with increased beamwidth and bandwidth.
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Abstract
A compact antenna system can generate RF radiation fields having increased beamwidths and bandwidths. The antenna system can include one or more patch radiators. The lower patch radiators can be mounted to a printed circuit board that can include a ground plane which defines a plurality of slots. The slots within the ground plane of the printed circuit board can be excited by stubs that are part of the feed network of the printed circuit board. The slots, in turn, can establish RF radiation in a cavity which is disposed adjacent to the ground plane of the printed circuit board and a ground plane of the antenna system.
40 Citations
17 Claims
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1. An antenna array comprising:
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a plurality of stacked radiating elements, each stacked radiating element comprising a first rectangular patch radiator and a second rectangular patch radiator;
a printed circuit board disposed adjacent to each said fist rectangular patch radiator, said printed circuit board comprising a plurality of stubs and a ground plane;
said first rectangular patch radiator disposed between said second rectangular patch radiator and said printed circuit board;
a plurality of slots positioned within said ground plane, each slot being aligned with a respective stacked radiating element; and
a plurality of cavities enclosing said ground plane and respective slots whereby said stubs feed said slots and said slots excite respective cavities such that said patch radiators radiate RF energy with increased beamwidth and bandwidth. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An antenna array comprising:
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a plurality of stacked radiating elements, each stacked radiating element comprising a first radiator and a second radiator;
a printed circuit board disposed adjacent to said first radiator, said printed circuit board comprising a plurality of stubs and a ground plane, said first radiator being disposed between said second radiator and said printed circuit board;
a plurality of slots positioned within said ground plane, each slot being associated with a respective stacked radiating element;
a plurality of cavities adjacent to said ground plane and respective slots whereby said stubs feed said slots and said slots excite respective cavities such that said radiators radiate RF energy with increased beamwidth and bandwidth; and
a radome positioned over the plurality of stacked radiating elements, said radome improving the performance of the antenna array. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for improving the performance of an antenna array comprising a plurality of stacked radiating elements comprising the steps of:
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positioning a plurality of slots within a ground plane of a printed circuit board;
propagating RF energy along a feed network;
dissipating heat from the feed network into portions of a metallic cavity;
exciting the slots to establish a mode of RF energy within the metallic cavity;
exciting patch radiators with the RF energy produced by the slots and the cavity; and
improving performance of the antenna array by protecting the antenna array with a radome. - View Dependent Claims (15, 16, 17)
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Specification