S. Kiryu et al., FABRICATION OF ALL-NBCN FLUX-FLOW OSCILLATORS WITH A TAPERED SLOTLINEANTENNA AND OFF-CHIP DETECTION OF THEIR RADIATION POWER, IEEE transactions on applied superconductivity, 5(2), 1995, pp. 2955-2958
All-NbCN flux-flow oscillators (FFO) with a tapered slotline antenna (
TSA) were fabricated on MgO substrates. A five-step microstrip transfo
rmer was used to couple an FFO, which has a low impedance, to a TSA ha
ving a high impedance, The microstrip transformers designed to have a
return loss more than 20 dB at the center frequency. We have measured
submillimeter wave radiation from the oscillators using an off-chip si
licon-composite bolometer. Radiation from fabricated FFO was detected
in a bias voltage range from 1.18 mV to 1.48 mV, which corresponds to
a frequency range from 570 GHz to 710 GHz.