WebbA direct coupling slotline-to-microstrip transformer is then used to couple the RF signal from the narrow slotline to the microstrip line, where the Nb-AlOx-Nb SIS junction is fabricated. A silicon substrate was chosen to decrease the impedance of the slotline. WebbList of selected publications. 2001. 1. “Anisotropy in the transparency of HTS films at millimetre and submillimeter microwave radiation”, M.Tarasov, E.Stepantsov ...
ALMA SIS mixer optimizati on for stable operation
http://www.tstnetwork.org/shownews1.asp?id=17 Webb1 mars 1991 · The U.S. Department of Energy's Office of Scientific and Technical Information flowersabsolut
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Webb1 juni 1996 · Design details are given for a 205-270 GHz fixed-tuned SIS receiver in which the SIS mixer and HEMT IF amplifier are integrated into a single compact unit. The mixer and IF amplifier are connected with an inductor which provides the reactive part of the optimum input impedance for the HEMT. Webb1 jan. 1992 · The oscillations in the ranges 75 - 260 GHz have been experimentally observed. The values of the generated power have been calculated from the amplitudes of the quasiparticle and Shapiro steps on the I-V curve of the detector junctions. The detected power levels higher than 0.1 /2W have been obtained. WebbThis resulted in a significant improvement in noise temperature of the mixer at those bias points. This observation is important for SIS mixers operating at frequencies near or above gap frequency (ωgap) because the warping of the second negative photon step to the positive display side, narrowing down the bias voltage interval in which measurement of … green and white art