Free Space Loss and Atmospheric Effects
Jeon, Tae-In; Lehtomäki, Janne; Kokkoniemi, Joonas; Juttula, Harri; Mäkynen, Anssi; Juntti, Markku (2021-03-21)
Springer
21.03.2021
Jeon, TI., Lehtomäki, J., Kokkoniemi, J., Juttula, H., Mäkynen, A., Juntti, M. (2022). Free Space Loss and Atmospheric Effects. In: Kürner, T., Mittleman, D.M., Nagatsuma, T. (eds) THz Communications. Springer Series in Optical Sciences, vol 234. Springer, Cham. https://doi.org/10.1007/978-3-030-73738-2_6
https://rightsstatements.org/vocab/InC/1.0/
© 2022 Springer Nature Switzerland AG. This version of the article has been accepted for publication, after peer review (when applicable) but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-030-73738-2_6. Use of this Accepted Version is subject to the publisher’s Accepted Manuscript terms of use https://www.springernature.com/gp/open-research/policies/accepted- manuscript-terms
https://rightsstatements.org/vocab/InC/1.0/
© 2022 Springer Nature Switzerland AG. This version of the article has been accepted for publication, after peer review (when applicable) but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-030-73738-2_6. Use of this Accepted Version is subject to the publisher’s Accepted Manuscript terms of use https://www.springernature.com/gp/open-research/policies/accepted- manuscript-terms
https://rightsstatements.org/vocab/InC/1.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202312224017
https://urn.fi/URN:NBN:fi:oulu-202312224017
Tiivistelmä
Abstract
Free space path loss for THz communication is discussed. Molecular absorption mainly caused by water vapor is a major effect in terahertz propagation in the atmosphere. Both experimental and theoretical results are also discussed using the ITU models and the am model. A simplified model for molecular absorption that enables analytical study of THz communication is discussed without needing numerical calculations using huge number of coefficients. The time delay (shift) of the THz pulse is due to an increase in water vapor in the atmosphere, that is, an increase in refractive index. The time delay was measured and compared with theoretical calculation. Also, measured and calculated power attenuation losses for snowy and rainy weather conditions are presented.
Free space path loss for THz communication is discussed. Molecular absorption mainly caused by water vapor is a major effect in terahertz propagation in the atmosphere. Both experimental and theoretical results are also discussed using the ITU models and the am model. A simplified model for molecular absorption that enables analytical study of THz communication is discussed without needing numerical calculations using huge number of coefficients. The time delay (shift) of the THz pulse is due to an increase in water vapor in the atmosphere, that is, an increase in refractive index. The time delay was measured and compared with theoretical calculation. Also, measured and calculated power attenuation losses for snowy and rainy weather conditions are presented.
Kokoelmat
- Avoin saatavuus [38821]