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Metamaterials for surfaces and waveguides

  • US 10,461,433 B2
  • Filed: 08/21/2009
  • Issued: 10/29/2019
  • Est. Priority Date: 08/22/2008
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a continuous conducting surface having a plurality of openings, each opening complemented by a discrete conducting patch separated from the continuous conducting surface, the plurality of openings and patches providing an effective permeability in a direction parallel to the continuous conducting surface, wherein the effective permeability is less than zero;

    wherein the continuous conducting surface is a bounding surface of a parallel plate waveguide structure, and the effective permeability is an effective permeability for transverse electromagnetic (TEM) waves that propagate within the waveguide structure and parallel to the continuous conducting surface; and

    wherein the plurality of openings and patches provides a spatially-varying effective refractive index for the TEM waves.

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