Derivation of Metamaterial Equivalent Parameter Calculation Method Based on NRW Approach

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Resource Overview

This method derives the calculation of metamaterial equivalent parameters using the NRW approach, involving CST simulation to obtain S11 and S21 parameters. The complex forms of S11 and S21 are exported and processed through MATLAB implementation to compute permittivity and permeability.

Detailed Documentation

Based on the NRW (Nicolson-Ross-Weir) method, we can derive an approach for calculating equivalent parameters of metamaterials. The process begins with CST Microwave Studio simulations to obtain scattering parameters S11 and S21. These parameters are then exported in complex number format and imported into MATLAB for computational processing. The MATLAB implementation typically involves solving the inverse problem using NRW algorithm equations, where key functions may include complex number manipulation, matrix operations, and root-solving techniques to extract material parameters. Through this methodology, we can calculate both permittivity (ε) and permeability (μ) of the metamaterial structure. This comprehensive approach enables deeper understanding of metamaterial properties and facilitates further investigation into their practical applications.

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