Publication Date:
2019-08-28
Description:
Calculated and experimental design and operating characteristics of a 108-120 GHz superheterodyne radiometer with intermediate frequency modulation and a second harmonic frequency converter are presented and discussed. With a 1 sec time constant, the radiometer fluctuation sensitivity threshold is 1 K, without degradation in 2 hours of operation. Graphs of frequency variations, calibration, conversion loss, rectified current, fixed bias voltage, and contact needle impedance are included.
Keywords:
GEOPHYSICS
Type:
NASA-TM-75562
,
PR-281
Format:
application/pdf
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