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Cryogenic microwave amplifiers for precision measurements

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3 Author(s)
Ivanov, E.N. ; Dept. of Phys., Western Australia Univ., Nedlands, WA, Australia ; Hartnett, J.G. ; Tobar, M.E.

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.

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:47 ,  Issue: 6 )