Qiu Haochuan, Liu Houfang, Jia Xiufeng, Liu Xiao, Li Yuxing, Feng Jiafeng, Wei Hongxiang, Yang Yi, Ren Tian-Ling
Institute of Microelectronics, Tsinghua University Beijing 100084 China
Tsinghua National Laboratory for Information Science and Technology, Tsinghua University Beijing 100084 China.
RSC Adv. 2018 Sep 5;8(55):31331-31336. doi: 10.1039/c8ra07173j.
Ultra-wideband (UWB), a radio transmission technology with wide bandwidth exceeding the minimum of 500 MHz or at least 20% of the center frequency, is a revolutionary approach for short-range high-bandwidth wireless communication. In this study, carbon nanotube (CNT) UWB antennas by direct laser-patterning technology have been successfully designed, fabricated and characterized. In contrast with traditional fabrication methods, the direct laser-patterning technology offers an exceptional potential for custom-designed, high-complexity and accuracy device fabrication. The "engraving" process on CNTs exposed to laser can be attributed to the bond breaking of C-C, evaporation of carbon atoms, and oxidation of CNTs by the oxygen molecules. Numerical analysis and experimental studies provide characteristics of CNT slot antennas with a wide impedance bandwidth (from 3.4 GHz to 14 GHz for S ≤ -10 dB), high average radiation efficiency (76%) and fractional bandwidth (121%) with small size of 30 × 30 mm. The results indicate the advantages of laser-patterned UWB antennas based on carbon nanotubes, which paves the way for industrial applications, particularly in the world of consumer electronics.
超宽带（UWB）是一种无线电传输技术，其带宽超过500MHz的最小值或至少为中心频率的20%，是一种用于短程高带宽无线通信的革命性方法。在本研究中，通过直接激光图案化技术成功设计、制造并表征了碳纳米管（CNT）超宽带天线。与传统制造方法相比，直接激光图案化技术为定制设计、高复杂性和高精度的器件制造提供了巨大潜力。碳纳米管在激光作用下的“雕刻”过程可归因于碳-碳键的断裂、碳原子的蒸发以及氧分子对碳纳米管的氧化。数值分析和实验研究给出了碳纳米管缝隙天线的特性，其具有宽阻抗带宽（S≤-10dB时为3.4GHz至14GHz）、高平均辐射效率（76%）和分数带宽（121%），尺寸小至30×30mm。结果表明了基于碳纳米管的激光图案化超宽带天线的优势，为工业应用，特别是在消费电子领域，铺平了道路。
