文章检索

  • 检索
  • 检索词:
  • 高级检索
您是今天第 760位访问者
您是第 7275349 位访问者
引用本文:
【打印本页】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 13253次   下载 3704 本文二维码信息
码上扫一扫!
分享到: 微信 更多
太赫兹脉冲大气传输衰减特性
王玉文,董志伟,李瀚宇,房艳燕
作者单位
王玉文 Graduate SchoolChina Academy of Engineering PhysicsBeijing 100088China 
董志伟 1.Microsystem and Terahertz Research CenterChina Academy of Engineering PhysicsMianyang Sichuan 621999China2.Institute of Applied Physics and Computational MathematicsBeijing 100094China 
李瀚宇 1.Microsystem and Terahertz Research CenterChina Academy of Engineering PhysicsMianyang Sichuan 621999China2.Institute of Applied Physics and Computational MathematicsBeijing 100094China 
房艳燕 Graduate SchoolChina Academy of Engineering PhysicsBeijing 100088China 
摘要:
太赫兹大气传输是太赫兹科学技术及其应用的重要组成部分,渗透于所有的太赫兹应用技术领域。研究基于辐射传输、色散理论和Van-Vleck Weisskopf线型,结合喷气推进实验室(JPL)数据库,建立了太赫兹脉冲大气传输衰减与色散模型,对0.1 THz~1 THz频段太赫兹辐射在水汽中的吸收衰减特性进行了数值模拟研究,与现有的文献数据进行了比对。通过计算太赫兹脉冲大气传输,分析不同水汽密度和传输距离对波形幅值、相位及频谱特性的影响,得到了3个比较稳定的太赫兹脉冲大气传输窗口0.14 THz~0.17 THz、0.19 THz~0.32 THz和0.32 THz~0.37 THz,为太赫兹通信和时域太赫兹空间传输提供了理论参考。
关键词:  太赫兹  大气传输  大气窗口  吸收衰减  脉冲
DOI:10.11805/TKYDA201502.0208
分类号:
基金项目:国家高技术研究发展计划基金资助项目(863计划)
Atmospheric attenuation characteristics of terahertz pulse propagation
WANG Yuwen1, DONG Zhiwei2,3, LI Hanyu2,3, FANG Yanyan1
1.Graduate School,China Academy of Engineering Physics,Beijing 100088,China;2.1.Microsystem and Terahertz Research Center,China Academy of Engineering Physics,Mianyang Sichuan 621999,China;3.2.Institute of Applied Physics and Computational Mathematics,Beijing 100094,China
Abstract:
THz atmospheric transmission is an important part of science and technology,which has permeated into almost all applications of terahertz technology. Research on terahertz atmospheric transmission is nearly on horizontal level in the existing literature. A dispersion attenuation model of terahertz atmospheric transmission is presented based on the radiation transfer, dispersion theory and Van-Vleck Weisskopf line-shape combined with Jet Propulsion Laboratory(JPL) database. The absorbing attenuation characteristics of terahertz atmospheric transmission along the slant path between 0.1 THz and 1 THz are studied using this model and compared with the existing literature. The influences of water vapor with different densities on the amplitude, phase and spectrum of the transient terahertz pulse are analyzed. Three relatively stable atmospheric transmission windows in 0.14 THz-0.17 THz,0.19 THz-0.32 THz and 0.32 THz-0.37 THz are obtained. This work has provided a theoretical reference for terahertz time-domain communications and space transmission.
Key words:  terahertz  atmospheric transmission  atmospheric window  absorption attenuation  pulse

分享按钮