Semiconductor millimeter and centimeter wave radiometer for the study of the radiation of an underlying surface
- Author:
- Kirsanov, Y. A.
- Published:
- Oct 1, 1979.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Bordonskiy, G. S., Sharapov, A. N., Khapin, Y. B., Etkin, V. S., Kravchenko, M. K., and Zazinov, A. N.
Online Version
- hdl.handle.net , Connect to this object online.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access - Summary:
- A theoretical and experimental investigation of a superheterodyne radiometer system with input frequency converter and intermediate frequency modulation is presented. Conditions are found, at which the temperature sensitivity of the device does not deteriorate. A sensitivity function to external parameters (temperature, heterodyne power) of a radiometer system with intermediate frequency modulation and a Schottky diode frequency converter is presented and calculated. Use of a frequency converter at the second harmonic of the heterodyne permitted simplication of the radiometer design and the use of a semiconductor heterodyne. A 3 cm range intermediate frequency amplifier permitted the use of centimeter wave radiometer signals. Fluctuation sensitivity of radiometers with a 1 sec time constant is 0.3 K at 3.4 mm and 0.06 K at 3 cm.
- Other Subject(s):
- Collection:
- NASA Technical Reports Server (NTRS) Collection.
- Note:
- Document ID: 19800002233.
Accession ID: 80N10477.
PR-321.
NASA-TM-75671. - Terms of Use and Reproduction:
- No Copyright.
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