Design of a transmission-line metamaterial with a negative index of refraction at S-Band / Concepção de um metamaterial de linha de transmissão com um índice negativo de refracção na banda S

A metamaterial based on a two-dimensional transmission-line network loaded with inductors and capacitors enabling to achieve negative-refractive-index (NRI) is developed. The dispersion characteristics are calculated by their equivalent circuit model and an operating frequency of 2.95 GHz in which there is impedance matching with free space is chosen in the S-Band. This NRI metamaterial supports transverse electric (TE) waves, thus it can be used in applications such as lensing.

Experimental Investigation of Metamaterial from Ringer Conductors

In this work creation of structure from ring conductors having negative index of refraction is shown. Experimental confirmation and finding of index of refraction, namely its real and imaginary part taking into account the error, for single-layer, two-layer, three-layered and four-layer structure.