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Updated: Mar 24, 2026
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
16.0K
Effective impedance modeling of metamaterial structures
Summary
We developed a method to calculate metamaterial effective impedance using Fresnel reflection coefficients. This approach simplifies modeling metamaterial waveguides and surface modes across various incidence angles.
Area of Science:
- Electromagnetism
- Materials Science
- Metamaterials
Background:
- Metamaterials offer unique electromagnetic properties.
- Calculating their effective impedance is crucial for device design.
- Existing methods can be complex or limited in scope.
Purpose of the Study:
- To present a novel method for retrieving effective impedance of metamaterials.
- To establish a connection between scattering-based formalism and field averaging techniques.
- To enable reliable modeling of metamaterial devices.
Main Methods:
- Deriving effective impedance from Fresnel reflection coefficients at interfaces.
- Utilizing projection of modal expansions onto dominant modes.
- Expressing effective impedance as a ratio of averaged field quantities.
Main Results:
- Effective impedance can be calculated from reflection coefficients.
- Scattering-based and field averaging methods are reconcilable.
- A semianalytic technique based on effective impedance accurately models metamaterials.
Conclusions:
- The presented method provides a robust way to determine metamaterial effective impedance.
- This facilitates accurate modeling of planar metamaterial waveguides and surface modes.
- The findings bridge scattering theory and effective medium approximations.
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