Negative refraction and focusing in hyperbolic transmission-line periodic grids

被引：43

作者：

Eleftheriades, GV ^{[1
]}

Siddiqui, OF ^{[1
]}

机构：

[1] Univ Toronto, Edward S Rogers Sr Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2005年 / 53卷 / 01期

关键词：

focusing; hyperbolic dispersion; metamaterials; microstrip transmission lines (TLs); negative refraction; periodic structures; plasma; resonance cones;

D O I：

10.1109/TMTT.2004.839944

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：

We propose a class of anisotropic periodic structures with spatial hyperbolic dispersion characteristics, synthesized by arranging unloaded transmission lines (TLs) in a two-dimensional planar grid. These planar periodic grids support the formation of sharp beams, called resonance cones. Analogous resonance-cone effects are observed in highly anisotropic resonant plasmas. By interfacing transposed versions of these anisotropic periodic grids, negative refraction and focusing of resonance cones can be achieved. Simulation results are presented for ideal TL grids and are verified experimentally using planar microstrip grids. These grids are easy to fabricate at a low cost. Moreover, since the TLs are unloaded and the periodicity is comparable to the wavelength, the structures are scalable from microwave to millimeter-wave frequencies and could be utilized for spatial filtering, multiplexing, and demultiplexing.

引用

页码：396 / 403

页数：8

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