Title :
Comments on "subwavelength focusing using a negative-refractive-index transmission line"
Author :
Xu, Xinhe ; Wen, Guangjun ; Gan, Yuehong ; Cao, Yunjian
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu
fDate :
6/29/1905 12:00:00 AM
Abstract :
The above paper (A. Grbic and G. V. Eleftheriades, "Subwavelength focusing using a negative-refractive-index transmission-line lens," IEEE Antennas Wireless Propagat. Lett., vol.2, p.186-189, 2003) analyzes (1) negative-refractive-index transmission-line lens and (2) subwavelength focusing. Unfortunately, there are some errors in the derivations of the radial TL impedance expressions for the TL mesh and the dual TL. Despite this, one should honor the achievements in the paper in which Grbic and Eleftheriades present simulations demonstrating subwavelength focusing of electromagnetic waves.
Keywords :
refractive index; transmission line theory; electromagnetic waves; negative-refractive-index; radial transmission line impedance; subwavelength focusing; transmission line mesh; Electromagnetic scattering; Equations; Gallium nitride; Helium; Impedance; Lenses; Propagation constant; Refractive index; Transmission lines; Voltage; Negative refractive index; radial impedance; transmission line;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2007.895921
