中国物理B ›› 2010, Vol. 19 ›› Issue (6): 67801-067801.doi: 10.1088/1674-1056/19/6/067801
吴昱明1, 李乐伟1, 庄蕾蕾2, 桂太龙2, 王玥3, 吴群4
Wu Qun(吴群)a)d)†, Wang Yue(王玥)a)b), Wu Yu-Ming(吴昱明)c), Zhuang Lei-Lei(庄蕾蕾)b), Li Le-Wei(李乐伟)c), and Gui Tai-Long(桂太龙)b)
摘要: 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 .
中图分类号: (Antennas: theory, components and accessories)