DocumentCode :
1493083
Title :
Phase sensitive heterodyne receivers with SIS quasiparticle mixers
Author :
Bocko, Mark F. ; Wengler, Michael J. ; Zhang, Zhao Nan
Author_Institution :
Dept. of Electr. Eng., Rochester Univ., NY, USA
Volume :
25
Issue :
2
fYear :
1989
fDate :
3/1/1989 12:00:00 AM
Firstpage :
1038
Lastpage :
1041
Abstract :
It is noted that it is possible to operate a mixer as a phase-sensitive linear amplifier by pumping with two local oscillators (LOs) separated in frequency by twice the IF (intermediate frequency) and symmetrically located about the signal frequency. In principle a phase-sensitive amplifier can detect a signal without adding any noise. The authors present a formalism developed to describe two-LO mixers, and extend the quantum mixer theory to calculate expressions for the gain and noise of a two-LO mixer. The full quantum mechanical formulation used here enables an analysis of the mixer noise for general input states, for example, a squeezed state. It is demonstrated that a two-LO mixer is phase-sensitive. The results are pertinent to the design of phase-sensitive heterodyne receivers with SIS (superconductor-insulator-superconductor) quasiparticle mixers
Keywords :
mixers (circuits); radiofrequency amplifiers; superconducting junction devices; SIS quasiparticle mixers; gain; local oscillators; noise; phase-sensitive heterodyne receivers; phase-sensitive linear amplifier; quantum mechanical formulation; quantum mixer theory; signal frequency; squeezed state; Antenna measurements; Coupling circuits; Frequency; Local oscillators; Mixers; Noise measurement; Phase measurement; Phase noise; Quantum mechanics; Superconducting device noise;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.92466
Filename :
92466
Link To Document :
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