METAMATERIAL WAVEGUIDE LENS
First Claim
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1. An apparatus, comprising:
- a parallel plate waveguide having an input port region, an output port region, and a plurality of subwavelength apertures within one or more conducting surfaces of the parallel plate waveguide, the plurality of subwavelength apertures providing a respective plurality of individual electromagnetic responses;
where the plurality of individual electromagnetic responses provides a substantially increased optical distance between the input port region and the output port region.
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Abstract
A metamaterial waveguide structure is disclosed. In some approaches the metamaterial waveguide structure is compressed along an optical axis using transformation optics techniques. An example is a Rotman lens that is compressed by 27 percent along the optical axis while maintaining the beam steering range, gain and side lobe amplitudes over a broad frequency range. In some approaches the metamaterial waveguide structure includes a plurality of complementary metamaterial elements patterned on a conducting surface of the waveguide.
185 Citations
31 Claims
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1. An apparatus, comprising:
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a parallel plate waveguide having an input port region, an output port region, and a plurality of subwavelength apertures within one or more conducting surfaces of the parallel plate waveguide, the plurality of subwavelength apertures providing a respective plurality of individual electromagnetic responses; where the plurality of individual electromagnetic responses provides a substantially increased optical distance between the input port region and the output port region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method, comprising:
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delivering an electromagnetic wave to a first port region of a parallel plate waveguide; and compressing the electromagnetic wave as it propagates within the parallel plate waveguide from the first port region to a second port region by a coupling of the electromagnetic wave to a plurality of subwavelength apertures in a conducting surface of the parallel plate waveguide; where the compressing includes compressing along an axis joining the first port region and the second port region. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method, comprising:
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identifying a coordinate transformation that reduces the axial spatial extent of a waveguide lens; determining electromagnetic medium parameters that correspond to the identified coordinate transformation; and determining respective physical parameters for a plurality of apertures positionable in one or more conducting surfaces of the waveguide lens to provide effective electromagnetic medium parameters that substantially correspond to the determined electromagnetic medium parameters. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification