我们将讨论的是分配散装电磁特性，如标准的检索方法的有效性

介电常数« 和磁性permeabilitym ，从散射SSD参数的计算

有限厚度samples.S参数反演方法最近已成为人为的特征结构的超材料，这在本质上，本质上是不均匀的主要手段。而单位

超材料的细胞能够比自由空间波长小得多，仍

整个晶胞在工作频率的相位几乎所有的超材料显著变化

结构报告的日期。在这方面，超材料不严格满足的有效媒介的限制

和更接近于概念上的光子晶体。-We discuss the validity of standard retrieval methods that assign bulk electromagnetic properties, such as the

electric permittivity« and the magnetic permeabilitym, from calculations of the scattering sSd parameters for

finite-thickness samples.S-parameter retrieval methods have recently become the principal means of characterizing artificially structured metamaterials, which, by nature, are inherently inhomogeneous. While the unit

cell of a metamaterial can be made considerably smaller than the free space wavelength, there remains a

significant variation of the phase across the unit cell at operational frequencies in nearly all metamaterial

structures reported to date. In this respect, metamaterials do not rigorously satisfy an effective medium limit

and are closer conceptually to photonic crystals.