PHASED ARRAY METAMATERIAL ANTENNA SYSTEM
First Claim
1. A phased-array antenna system for transmitting at least a first electromagnetic signal, said system comprising:
- a phased-array antenna having a plurality of elements, wherein said plurality of elements is arranged in an array, each of said elements in said plurality adapted to radiate electromagnetic energy to form said electromagnetic signal; and
a biconcave electromagnetic lens for inputting electromagnetic signals to at least a portion of said elements;
wherein at least a portion of said electromagnetic lens comprises a metamaterial.
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Accused Products
Abstract
An efficient, low-loss, low sidelobe, high dynamic range phased-array radar antenna system is disclosed that uses metamaterials, which are manmade composite materials having a negative index of refraction, to create a biconcave lens architecture (instead of the aforementioned biconvex lens) for focusing the microwaves transmitted by the antenna. Accordingly, the sidelobes of the antenna are reduced. Attenuation across microstrip transmission lines may be reduced by using low loss transmission lines that are suspended above a ground plane a predetermined distance in a way such they are not in contact with a solid substrate. By suspending the microstrip transmission lines in this manner, dielectric signal loss is reduced significantly, thus resulting in a less-attenuated signal at its destination.
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Citations
11 Claims
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1. A phased-array antenna system for transmitting at least a first electromagnetic signal, said system comprising:
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a phased-array antenna having a plurality of elements, wherein said plurality of elements is arranged in an array, each of said elements in said plurality adapted to radiate electromagnetic energy to form said electromagnetic signal; and
a biconcave electromagnetic lens for inputting electromagnetic signals to at least a portion of said elements;
wherein at least a portion of said electromagnetic lens comprises a metamaterial. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification