Microstrip antenna array with periodic filters for enhanced performance
First Claim
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1. An antenna unit, comprising:
- a ground plane;
a substrate;
a receiving microstrip antenna array formed on said substrate;
a transmitting microstrip antenna array formed on said substrate; and
a plurality of periodic filters formed using openings in said ground plane.
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Abstract
An antenna unit formed in the shape of a hollow box comprising (a) a substrate forming the front side of the antenna unit, (b) a first microstrip antenna array formed on the substrate, (c) a second microstrip antenna array formed on the substrate, (d) a ground plane forming the rear side of the antenna unit, and (e) a plurality of periodic filters formed on the ground plane. The periodic filters are formed by etching a series of circular patterns, or holes, through the ground plane. The periodic stop band filters provide for improved isolation between the microstrip antenna arrays, without the need for adding additional costly or space consuming components.
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Citations
25 Claims
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1. An antenna unit, comprising:
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a ground plane;
a substrate;
a receiving microstrip antenna array formed on said substrate;
a transmitting microstrip antenna array formed on said substrate; and
a plurality of periodic filters formed using openings in said ground plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A antenna unit, comprising:
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a ground plane;
a substrate;
at least one microstrip antenna array formed on said substrate;
a plurality of periodic filters etched on said ground plane. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of improving isolation between a plurality of microstrip antenna arrays comprising the steps of:
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1) providing a plurality of microstrip antenna arrays on a substrate;
2) providing a ground plane; and
3) forming at least one periodic filter on said ground plane, wherein said filter is located between said plurality of antenna arrays. - View Dependent Claims (20, 21)
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22. A method of improving gain of a microstrip antenna array comprising the steps of:
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1) providing at least one microstrip antenna array on a substrate;
2) providing a ground plane; and
3) forming at least one periodic filter in said ground plane. - View Dependent Claims (23, 24)
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25. An antenna unit, comprising:
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a ground plane;
a conductive layer;
a substrate positioned between said ground plane and said conductive layer;
a receiving microstrip antenna array formed on said substrate;
a transmitting microstrip antenna array formed on said substrate;
a plurality of periodic filters formed using openings in said conductive layer.
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Specification