NASA NTRS · 19930018557
A planar quasi-optical SIS receiver for array applications
Abstract
A planar, quasi-optical SIS receiver operating at 230 GHz is described. The receiver consists of a 2 x 5 array of half wave dipole antennas with ten niobium-aluminum oxide-niobium SIS junctions on a quartz dielectric-filled parabola. The 1.4 GHz intermediate frequency is coupled from the mixer via coplanar strip transmission lines and 4:1 balun transformers. The receiver is operated at 4.2 K in a liquid helium immersion cryostat. We report accurate measurements of the performance of single receiver elements. A mixer noise temperature of 89 K DSB, receiver noise temperature of 156 K DSB, and conversion loss of 3 dB into a matched load have been obtained.
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Stimson, Philip A., Dengler, Robert J., Siegel, Peter H., Leduc, Henry G.. 1992-01-01. A planar quasi-optical SIS receiver for array applications. https://ntrs.nasa.gov/citations/19930018557
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