CAJ | 학술논문

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。
태혁자대기전수시태혁자과학기술급기응용적중요조성부분，삼투우소유적태혁자응용기술영역。연구기우복사전수、색산이론화 Van-Vleck Weisskopf선형，결합분기추진실험실(JPL)수거고，건립료태혁자맥충대기전수쇠감여색산모형，대0.1 THz~1 THz빈단태혁자복사재수기중적흡수쇠감특성진행료수치모의연구，여현유적문헌수거진행료비대。통과계산태혁자맥충대기전수，분석불동수기밀도화전수거리대파형폭치、상위급빈보특성적영향，득도료3개비교은정적태혁자맥충대기전수창구0.14 THz~0.17 THz、0.19 THz~0.32 THz화0.32 THz~0.37 THz，위태혁자통신화시역태혁자공간전수제공료이론삼고。
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.