排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Characterization of the radiation from single-walled zig-zag carbon nanotubes at terahertz range 下载免费PDF全文
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 = 0.5\lambda . 相似文献
2.
This paper investigates the electromagnetic radiation
characteristics of a metallic, large aspect ratio single walled
carbon nanotube antenna in the terahertz frequency region below 12.5
THz. The key features of terahertz pulse have been revealed on the
carbon nanotube antenna in comparison with conventional
photoconductive switching. The terahertz waveforms, radiation power
and their field distributions have been evaluated and are analysed.
The Fourier transformed spectra over the whole frequency range
demonstrate that the carbon nanotube antenna can be used as
radiation source for broadband terahertz applications. 相似文献
1