Predicting Atmospheric Attenuation under Pristine Conditions between 0.1 and 100 THz
File(s)
Published version
Author(s)
Sun, J
Hu, F
Lucyszyn, S
Type
Journal Article
Abstract
This multidisciplinary article reports on a research application-led study for predicting atmospheric attenuation, and tries to bridge the knowledge gap between applied engineering and atmospheric sciences. As a useful comparative baseline, the paper focuses specifically on atmospheric attenuation under pristine conditions, over the extended terahertz spectrum. Three well-known simulation software packages are compared and contrasted ('HITRAN on the Web', MODTRAN(RM)4 and LBLRTM). Techniques used for modeling atmospheric attenuation have been applied to investigate the resilience of (ultra-)wide fractional bandwidth applications ('THz Torch') to the effects of molecular absorption. Two extreme modeling scenarios are investigated: horizontal path links at sea level and Earth-space path links. It is shown by example that a basic software package ('HITRAN on the Web') can give good predictions with the former; whereas sophisticated simulation software (LBLRTM) is required for the latter. Finally, with molecular emission included, carrier-to-noise ratio fade margins can be calculated for the effects of line broadening due to changes in macroscopic atmospheric conditions with sub-1 THz ultra-narrow fractional bandwidth applications. Outdoors can be far from pristine, with additional atmospheric contributions only briefly introduced here; further discussion is beyond the scope of this study, but relevant references have been cited.
Date Issued
2016-11-07
Date Acceptance
2016-10-25
Citation
IEEE Access, 2016, 4, pp.9377-9399
ISSN
2169-3536
Publisher
Institute of Electrical and Electronics Engineers
Start Page
9377
End Page
9399
Journal / Book Title
IEEE Access
Volume
4
Copyright Statement
© 2016 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.
License URL
Sponsor
Medical Research Council (MRC)
Imperial College Healthcare NHS Trust- BRC Funding
Identifier
http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7736955
Grant Number
MC_PC_14100
ICiC funding 2015/16
Subjects
Science & Technology
Technology
Computer Science, Information Systems
Engineering, Electrical & Electronic
Telecommunications
Computer Science
Engineering
THz
thermal infrared
atmospheric attenuation
transmittance
carrier-to-noise
molecular absorption
molecular emission
HITRAN
MODTRAN (R)
LBLRTM
THz Torch
WATER-VAPOR CONTINUUM
GAAS PHOTOCONDUCTIVE ANTENNA
TRANSFER MODEL LBLRTM
TERAHERTZ SPECTROSCOPY
ABSORPTION-COEFFICIENTS
WIRELESS COMMUNICATIONS
INFRARED CONTINUUM
ROOM-TEMPERATURE
SPECTRAL REGION
RADIATION
Publication Status
Published
Date Publish Online
2016-11-07