Akademik Veri Yönetim Sistemi
Progress in Electromagnetics Research Symposium (PIERS 2009 Moscow), Moscow, Rusya, 12 - 21 Ağustos 2009, ss.785-788, (Tam Metin Bildiri)
Negative refraction metamaterials can be realized with structures containing elements with negative material parameters, electric permittivity E and magnetic permeability pc. A well-known resonating structure that can be used to obtain negative permeability is a circular split-ring resonator (CSRR), which creates nonlinear magnetic behavior due to the resonant interaction between the inductance of the rings and the capacitance across the gaps. The effective magnetic permeability of CSRRs for a unit cell of N can be modeled by the summation expression for frequency dependence to obtain wide negative refraction band at terahertz (THz) frequency band. Numerical results illustrate that the wider frequency range of magnetic response can be achieved by combining the CSRRs. Then, a material with negative index of refraction can be constructed by combining proposed structure with an array of wires, incorporating one thin copper wire into each CSRR layer. This produces a negative permittivity effect in a frequency region that overlaps with the negative permeability region of the CSRRs. It is shown that the proposed model can be used to realize the broadband metamaterials for negative refraction for desired frequency range.