Title :
A performance evaluation of an RF switching radiometer
Author :
Byeong Kwon Park ; Jeong Hwan Kim ; Ki Chai Kim
Author_Institution :
Korea Stand. Res. Inst., Taejon, South Korea
Abstract :
The authors present a performance evaluation of an RF switching radiometer used as a noise comparator at X-band. The sensitivity, thermal stability, and noise source stability are examined. The temperature stability was improved by circulating water on the critical components. The system is sufficiently sensitive and stable for the calibration of noise sources. The precision of the noise temperature measurement is estimated within 0.01 dB using a gas-discharge standard noise source.<>
Keywords :
calibration; comparators (circuits); discharges (electric); microwave measurement; noise generators; radiometers; stability; RF switching radiometer; X-band; calibration; circulating water; gas-discharge standard noise source; noise comparator; noise generator; noise source stability; noise temperature measurement; performance evaluation; sensitivity; temperature stability; thermal stability; Attenuators; Blades; Discharges; Noise measurement; Radio frequency; Radiometry; Stability; Temperature control; Temperature distribution; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.110078
