Absolute Power Measurement at 1.2 mm Wavelength

A new technique for the measurement of electromagnetic power at millimeter wavelengths is described. A gas filled waveguide is used to measure the absorption of an electric dipole rotational line. From a study of the change in the absorption as a function of power, the degree of saturation of the ga...

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Bibliographic Details
Published in:Review of scientific instruments 1966-09, Vol.37 (9), p.1162-1164
Main Authors: Senitzky, B., Liebe, H.
Format: Article
Language:English
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Summary:A new technique for the measurement of electromagnetic power at millimeter wavelengths is described. A gas filled waveguide is used to measure the absorption of an electric dipole rotational line. From a study of the change in the absorption as a function of power, the degree of saturation of the gas is measured. The experimental results are then compared to a collision broadened absorption theory including linear waveguide losses to determine the input power required for the measured saturation. The technique can be used to measure powers as low as 10−6W.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1720447