Angular Sensitivity of VHF-Band CNT Antenna

A carbon nanotube (CNT)-based antenna detects incoming electromagnetic waves based on electrically induced mechanical vibration. In this study, we perform an analysis of the angular sensitivity of a CNT-based antenna. To analyze the mechanical vibration, we introduce a simple model using the image charge method. The analysis shows that the angular sensitivity depends on |sin2θ|, where θ is the angle of arrival. This is clearly different from the traditional Hertzian dipole detector, whose sensitivity varies with |sinθ|. In addition, the full width at half maximum of the angular sensitivity distribution for the CNT-based antenna is 0.36 π, which is smaller than the value of 0.5 π for a Hertzian dipole detector.

基于碳纳米管（CNT）的天线依据电致机械振动来探测入射的电磁波。在这项研究中，我们对基于碳纳米管的天线的角灵敏度进行了分析。为了分析机械振动，我们引入了一个利用镜像电荷法的简单模型。分析表明，角灵敏度取决于|sin2θ|，其中θ是入射角。这与传统的赫兹偶极子探测器明显不同，后者的灵敏度随|sinθ|变化。此外，基于碳纳米管的天线的角灵敏度分布的半高全宽为0.36π，小于赫兹偶极子探测器的0.5π的值。