Title :
Fabrication of all-NbCN flux-flow oscillators with a tapered slotline antenna and off-chip detection of their radiation power
Author :
Kiryu, S. ; Kohjiro, S. ; Shoji, A. ; Kodaira, S. ; Kawaguchi, K. ; Inatani, J.
Author_Institution :
Electrotech. Lab., Tsukuba, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
All-NbCN flux-flow oscillators (FFO) with tapered slotline antenna (TSA) were fabricated on MgO substrates. A five-step microstrip transformer was used to couple an FFO, which has a low impedance, to a TSA having a high impedance, The microstrip transformer is 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 silicon-composite bolometer. Radiation from a 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.<>
Keywords :
flux flow; niobium compounds; slot antennas; submillimetre wave antennas; submillimetre wave oscillators; superconducting junction devices; superconducting microwave devices; 1.18 to 1.48 mV; 20 dB; 570 to 710 GHz; MgO; MgO substrates; NbCN; all-NbCN flux-flow oscillators; fabrication; microstrip transformer; off-chip detection; return loss; silicon-composite bolometer; submillimeter wave radiation power; tapered slotline antenna; Antenna measurements; Fabrication; Frequency; Impedance; Microstrip; Oscillators; Radiation detectors; Slot antennas; Slotline; Submillimeter wave measurements;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
