Title :
A Continuous Comparison at 97 GHz Radiometer
Author :
Predmore, C. Read ; Erickson, Neal R. ; Huguenin, G. Richard ; Goldsmith, Paul F.
fDate :
1/1/1985 12:00:00 AM
Abstract :
A continuous comparison radiometer has been implemented at 97 GHz using quasi-optical techniques for local oscillator (LO) injection and realization of a 90° hybrid. Cryogenically cooled Schottky-diode mixers and FET amplifiers give a double-sideband (DSB) system temperature of 250 K. The system is self-calibrating and optimized under computer control. The root-mean-square (rms) fluctuations due to the receiver are less than 0.025 K with a 1-s integration time.
Keywords :
Calibration; Fluctuations; Frequency; Local oscillators; Observatories; Radio astronomy; Radiometry; Receivers; Switches; Voltage;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1985.1132936
