• DocumentCode
    966379
  • Title

    Measurement of attenuation and change of refractive index due to water vapour in the atmosphere at 890 GHz

  • Author

    Batt, R.J. ; Bradley, H.L. ; Harris, D.J.

  • Author_Institution
    Portsmouth Polytechnic, Department of Electrical & Electronic Engineering, Portsmouth, UK
  • Volume
    10
  • Issue
    23
  • fYear
    1974
  • Firstpage
    470
  • Lastpage
    471
  • Abstract
    An open-resonator technique is used to measure the attenuation and change of refractive index at 890 GHz for a variable water-vapour content in the atmosphere, using an HCN laser as a source. The refractive index increases uniformly with water-vapour content, a change of relative humidity from 0 to 50% at 26°C resulting in an index change of 1.3 × 10¿4. An attenuation of 85±20 dB/km was measured for 50% relative humidity at 26°C.
  • Keywords
    atmospheric electromagnetic wave propagation; humidity; refractive index; 890 GHz; HCN laser; atmosphere; change of refractive index; measurement of attenuation; open resonator technique; relative humidity; water vapour;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19740374
  • Filename
    4245262
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=966379