Numerical computation of two-lo SIS mixer gain and noise

Conference · Wed Mar 01 04:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:5913743

Zhang, Z N; Bocko, M F; Wengler, M J

An SIS mixer which is pumped simultaneously by two phase-coherent local oscillators operates as a phase sensitive linear amplifier. Phase sensitive linear amplifiers measure one quadrature of an incoming radiation field and may add less noise to the amplified signal than the quantum limit of one-half photon per unit bandwidth which is added by phase-insensitive linear amplifiers. In this paper the authors present numerical calculations of the gain and noise of a two-LO mixer based on an ideal SIS I-V curve. They demonstrate phase sensitive response of the mixer with two-LO pumping and present calculations of the noise for various dc bias conditions and embedding impedances. Preliminary results indicate that, for certain dc bias conditions and signal terminations, the noise added to a signal by the two-LO mixer operated in the single sideband mode can be a factor of 25 less than that added by a conventional single-sideband single-LO mixer.

• Research Organization: Dept. of Electrical Engineering, Univ. of Rochester, Rochester, NY (US)
• OSTI ID: 5913743
• Report Number(s): CONF-880812-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
AMPLIFICATION
AMPLIFIERS
COHERENT RADIATION
COMPUTER CALCULATIONS
ELECTROMAGNETIC RADIATION
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
EQUIPMENT
GAIN
INTEGRATED CIRCUITS
MASSLESS PARTICLES
MECHANICS
MICROELECTRONIC CIRCUITS
NOISE
NUMERICAL SOLUTION
OSCILLATORS
PHOTONS
QUANTUM MECHANICS
RADIATIONS