Spatial Harmonics and Homogenization of Negative-Refractive-Index Transmission-Line Structures

被引：7
|
作者：
Zedler, Michael [1 ]
Eleftheriades, George V. [1 ]
机构：
[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 2E4, Canada
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2010年 / 58卷 / 06期
关键词：
Homogenization; metamaterial; negative-refractive-index transmission line (NRI-TL);
D O I：
10.1109/TMTT.2010.2049160
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we discuss negative-refractive-index transmission-line (NRI-TL) metamaterial structures with respect to spatial harmonics. The power in the fundamental spatial harmonic is shown to yield a measure that relates to the homogeneity of the metamaterial. It is shown that NRI-TL metamaterials yield highly homogeneous field distributions if both the unit cell is short compared to the guided wavelength, and if the unloaded unit cell is short compared to the "free space" wavelength. Based on the homogeneity, we provide practical design choices for NRI-TL metamaterial unit cells. Under the restriction of a high homogeneity we derive expressions for extracting an effective permittivity and permeability. Circuit theory results and full-wave eigenmode simulations of two NRI-TL structures are presented.
引用
收藏
页码：1521 / 1531
页数：11
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