Characterization of the radiation from single-walled zig-zag carbon nanotubes at terahertz range

This paper investigates the radiation characteristics of metal single-walled zig-zag carbon nanotubes as a dipole antenna at terahertz wave range. The current distribution, input impedance and mutual impedance are calculated for various geometrical parameters of vertically-aligned carbon nanotubes....

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Bibliographic Details
Published in:Chinese physics B 2010-06, Vol.19 (6), p.534-540
Main Author: 吴群 王玥 吴昱明 庄蕾蕾 李乐伟 桂太龙
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Arrays
Dipole antennas
Gain
Mathematical analysis
Noise levels
Single wall carbon nanotubes
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Summary:This paper investigates the radiation characteristics of metal single-walled zig-zag carbon nanotubes as a dipole antenna at terahertz wave range. The current distribution, input impedance and mutual impedance are calculated for various geometrical parameters of vertically-aligned carbon nanotubes. The numerical results demonstrate the properties of the antenna depending strongly on the geometrical parameters such as the radius, the lengths of carbon nantobues, and the spacing between nanotubes. It is found that the zig-zag carbon nanotubes exhibit very high input impedance and the mutual impedances for antenna array applications. These unique high impedance properties are different from the conventional metal thin wire antenna. The far-field patterns and gain of antenna array are also calculated. The maximum gain of array of 100-element array is up to 20.0 dB, which is larger than the gain of 0.598 dB of single dipole antenna at distance d = 0.5λ.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/6/067801