Title :
Cryogenic microwave amplifiers for precision measurements
Author :
Ivanov, Eugene N. ; Hartnett, John G. ; Tobar, Michael E.
Author_Institution :
Dept. of Phys., Western Australia Univ., Nedlands, WA, Australia
Abstract :
The noise performance of two cryogenic HEMT amplifiers has been studied. The effective noise temperature for each amplifier is shown to be close to the 6 K thermodynamic temperature before a power threshold of about -70 dBm is achieved.
Keywords :
HEMT circuits; cryogenic electronics; microwave amplifiers; microwave measurement; HEMT amplifiers; cryogenic microwave amplifiers; effective noise temperature; microwave measurement; power threshold; precision measurements; Circuit noise; Cryogenics; Fluctuations; HEMTs; Low-noise amplifiers; Microwave amplifiers; Microwave measurements; Noise measurement; Power amplifiers; Temperature;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
