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A New SIS Mixer for the 2-MM Band

Authors:
A.R. Kerr, S.-K. Pan, A.W. Lichtenberger, F.L. Lloyd, N. Horner
Abstract:
This paper describes a tunable SIS mixer for the (non-standard) 124-190 GHz waveguide band. The mixer uses a series array of Nb/Al-Al203/Nb junctions in a suspended stripline on a quartz substrate. At each end of the substrate, the stripline is coupled to a full-height waveguide. The signal and local oscillator power enter from one waveguide, while the other contains a non contacting short-circuit which directly tunes out the series inductance of the array of junctions. Separate integrated tuning circuits on the individual junctions tune out the junction capacitance. The dimensions of the substrate and stripline are such that the SIS junctions can either be fabricated with the stripline as a single integrated circuit, or separately on a small (0.005" × 0.010") flip-chip which is subsequently soldered in place on the stripline. The design should be suitable for scaling to ~400 GHz.
Categories:
SIS Receivers
Year:
1993
Session:
1
Full-text:
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Page Number(s):
1-10