Graphical retrieval method for orthorhombic anisotropic materials

摘要

We apply the equivalent theory to orthorhombic anisotropic materials andprovide a general unit-cell design criterion for achieving a length-independentretrieval of the effective material parameters from a single layer of unitcells. We introduce a graphical retrieval method and phase unwrappingtechniques. The graphical method utilizes the linear regression technique. Ourmethod can reduce the uncertainty of experimental measurements and theambiguity of phase unwrapping. Moreover, the graphical method cansimultaneously determine the bulk values of the six effective materialparameters, permittivity and permeability tensors, from a single layer of unitcells.