NUMERICAL DESIGN CALCULATION OF A MILLIMETER WAVE MIXER WITH SIS TUNNEL JUNCTION
Conversion efficiency has been calculated as a function of local oscillator voltage and signal source conductance for SIS mixer in the 3-port approximation. The corresponding output conductance is determined. The reactance terms due to the nonlinear quantum reactance and the junction's capacitance are considered. Under practical conditions - 1/10 tapered waveguide mount, 50 OMEGA intermediate frequency load - without cancellation of these reactive terms, conversion loss of at least 7 dB is obtained; complete or partly tuning out the reactive terms leads to moderate conversion gain. The calculations have been carried out on the basis of a measured I-V characteristic for local oscillator frequency of 88 GHz in the limit of low intermediate frequency.
Bibliographic Reference: INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES, 1983, PP. 993-1014
Record Number: 1989122042800 / Last updated on: 1987-01-01
Available languages: en