Title :
Leaky-wave radiation from planar negative-refractive-index transmission-line metamaterials
Author :
Iyer, Ashwin K. ; Eleftheriades, G.V.
Author_Institution :
Edward S. Rogers, Sr. Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
This paper examines the radiation properties of one- and two-dimensional transmission-line negative-refractive-index (NRI) metamaterial antennas, and highlights the critical features of their dispersion characteristics as they pertain to leaky-wave radiation. This permits an explanation of the mechanisms with which backward, broadside or forward beams can be obtained from NRI transmission-line metamaterials. This discussion is supported by numerical simulations as well as by experimental results.
Keywords :
electromagnetic wave refraction; leaky wave antennas; microstrip antenna arrays; periodic structures; planar antenna arrays; refractive index; transmission line theory; 1D transmission-line metamaterials; 2D metamaterials; antenna dispersion characteristics; backward beams; broadside beams; forward beams; leaky-wave radiation; microstrip grid; negative-refractive-index metamaterials; periodic structures; planar NRI metamaterials; stripline; transmission line theory; Analytical models; Capacitors; Inductors; Metamaterials; Numerical simulation; Refractive index; Shunt (electrical); Solid modeling; Transmission lines; Transmitting antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1330451
