基于纳观域碳纳米管的太赫兹波天线研究

基于碳纳米管独特的结构特点建立了以其为基础的Pocklington积分方程，并设计了一种全新的碳纳米管太赫兹(THz)波天线.数值仿真和理论计算结果表明，碳纳米管能够产生高频THz电磁辐射，半波长为60μm、半径为2.712nm的单壁碳纳米管偶极天线在-10dB反射系数以下可以实现2.5THz与7.6THz的双频带工作，带宽分别为8.4%与2.7%，由其构成的纳米管天线阵可以获得10.3dB的高增益特性.所得结果有助于在纳观域开展高频THz波辐射源及天线的研究与设计. 关键词： 太赫兹波 碳纳米管 天线 辐射源

Terahertz antenna based on the carbon nano-tube in the nano-scopic domain

A novel nano-antenna for the generation and applications of terahertz wave and the Pocklingtons integral equation are proposed based on the carbon nanotube structure. The radiation characteristics of carbon nanotube antenna in terahertz range have been investigated by numerical simulation and theoretical computation. Both the numerical and analytical results demonstrate that the antenna with half wave length of 60μm takes on the dual frequency properties at the center frequencies of 2.5THz and 7.6THz，with the corresponding -10dB return loss (S₁₁) bandwidths of 8.4% and 2.7%，respectively. Compared with the gain of 0.598dB of a single dipole antenna the maximum gain of a typical 10×10 carbon nanotube antenna array is 10.30dB. The results could be useful for the design of carbon nanotube antenna arrays for generating terahertz wave.