Investigation of Resonator BWO-Based Spectroscopy of the Atmosphere in the THz Region  

作　　者：Yuwen Wang Zhiwei Dong Xun Zhou Zhenfei Luo Yuwen Wang;Zhiwei Dong;Xun Zhou;Zhenfei Luo(Graduate School of Chinese Academy of Engineering Physics, Beijing, China;Institute of Applied Physics and Computational Mathematics, Beijing, China;Terahertz Research Center, Chinese Academy of Engineering Physics, Mianyang, China;Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang, China)

机构地区：[1]Graduate School of Chinese Academy of Engineering Physics, Beijing, China [2]Institute of Applied Physics and Computational Mathematics, Beijing, China [3]Terahertz Research Center, Chinese Academy of Engineering Physics, Mianyang, China [4]Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang, China

出　　处：《Journal of Computer and Communications》2016年第3期68-73,共6页电脑和通信（英文）

摘　　要：This paper intends to give a code about atmospheric propagation effects affecting terahertz (THz) communication system. The main focus is on attenuation caused by atmospheric gases with the radiation transmission theory and the empirical continuum absorption based on the HITRAN database. Theoretical aspects about them are presented, emphasizing on those which deserve special attention as frequency increases. Laboratory measurements of the absorption spectra of laboratory air and major atmospheric gases mixed with water vapor in the 250 - 350 GHz frequency range at atmospheric pressure and room temperature on a basis of backward wave oscillators (BWOs) are obtained. The results of experiments are compared with the calculations. It is found that the water vapor transmittance is greater than the calculation. Data of these measurements agree with the results of analysis of atmospheric spectra with in statistical accuracy of experiments. Accurate measurements are also needed for further studies of the physics of the molecules and their interactions. The investigation makes it significant for enhancing accuracy of models of radiation propagation in the atmosphere.This paper intends to give a code about atmospheric propagation effects affecting terahertz (THz) communication system. The main focus is on attenuation caused by atmospheric gases with the radiation transmission theory and the empirical continuum absorption based on the HITRAN database. Theoretical aspects about them are presented, emphasizing on those which deserve special attention as frequency increases. Laboratory measurements of the absorption spectra of laboratory air and major atmospheric gases mixed with water vapor in the 250 - 350 GHz frequency range at atmospheric pressure and room temperature on a basis of backward wave oscillators (BWOs) are obtained. The results of experiments are compared with the calculations. It is found that the water vapor transmittance is greater than the calculation. Data of these measurements agree with the results of analysis of atmospheric spectra with in statistical accuracy of experiments. Accurate measurements are also needed for further studies of the physics of the molecules and their interactions. The investigation makes it significant for enhancing accuracy of models of radiation propagation in the atmosphere.

关 键 词：TERAHERTZ Backward Wave Oscillators Absorption Spectrum Water Vapor 

分 类 号：TN2[电子电信—物理电子学]