scholarly journals Experimental characterization of left-handed transmission lines with regularly spaced Schottky varactors

2010 ◽  
Vol 7 (9) ◽  
pp. 608-614 ◽  
Author(s):  
Jun Ogasawara ◽  
Koichi Narahara
Keyword(s):  
Transmission Lines ◽  
Experimental Characterization ◽  
Left Handed

Experimental characterization of dielectric properties of carbon nanotube networks

2011 ◽  
Vol 3 (4) ◽  
pp. 465-475
Author(s):  
Mahmoud A. EL Sabbagh
Keyword(s):  
Carbon Nanotube ◽  
Transmission Lines ◽  
Rf Circuits ◽  
Experimental Characterization ◽  
Experimental Realization ◽  
Fundamental Parameters ◽  
Conductive Properties ◽  
Carbon Nanotube Networks ◽  
Planar Transmission Lines

This paper explores the characterization of dielectric and conductive properties of carbon nanotube (CNT) networks. This is carried out by building planar transmission lines where conventional metallic traces are replaced by CNT networks. The proposed transmission lines with CNT networks are presented. Experimental realization and repeated two-port microwave measurements of proposed transmission lines enable the accurate extractions of their fundamental parameters showing percolation effects due to presence of CNT networks. The frequency-dependent phase velocity characteristics show a dramatic reduction compared to the speed of light in vacuum. The large magnitude of extracted complex permittivity for CNT networks also exhibits its percolation performance. The effects of CNTs' bulk density on measured and calculated parameters are explained. The results presented in this paper demonstrate the feasibility and the potential of building transmission lines and radio-frequency (RF) circuits elements using CNT networks.

Characterization of the composite right/left-handed transmission line metamaterial circuits using iterative method WCIP

2017 ◽  
Vol 9 (8) ◽  
pp. 1645-1652 ◽  
Author(s):  
Taieb Elbellili ◽  
Mohamed Karim Azizi ◽  
Lassaad Latrach ◽  
Hichem Trabelsi ◽  
Ali Gharsallah ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Theoretical Study ◽  
Periodic Structures ◽  
New Approach ◽  
Left Handed ◽  
Current Voltage ◽  
Real Behavior ◽  
Simulation Results ◽  
Process Method

A new study of right-handed and composite right/left-handed metamaterial transmission lines (TL) using their equivalent circuits and a new approach of the wave concept iterative process method is presented. This approach has the advantage of simulating all the periodic structures by only simulating one basic cell thanks to the surrounding periodic walls. A suitable choice of the cell length is necessary to work with the current as well as voltage and to approach the real behavior of the TL. The simulation results of these circuits, such as the calculation of current, voltage and the parameters S, helped to validate all the theoretical study.

Sign in / Sign up

Export Citation Format

Share Document