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Author
Ryabchun, Sergey
;
Tong, Cheuk-yu Edward
;
Blundell, Raymond
;
Kimberk, Robert
;
Gol’tsman, Gregory
Title
Stabilisation of a terahertz hot-electron bolometer mixer with microwave feedback control
Type
Conference Article
Year
2007
Publication
Proc. 18
th
Int. Symp. Space Terahertz Technol.
Abbreviated Journal
Proc. 18
th
Int. Symp. Space Terahertz Technol.
Volume
Issue
Pages
193-198
Keywords
waveguide NbN HEB mixers, Allan variance, stability
Abstract
We report on implementation of microwave feedback control loop to stabilise the performance of an HEB mixer receiver. It is shown that the receiver sensitivity increases by a factor of 4 over a 16-minute scan, and the corresponding Allan time increases up to 10 seconds, as opposed to an open loop value of 1 second. Our experiments also demonstrate that the receiver sensitivity is limited by the intermediate frequency chain.
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no
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1421
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