Publications Details

S-parameter measurements and applications of superconducting flux flow transistors

Martens, J.S.; Hietala, V.M.; Zipperian, T.E.; Ginley, D.S.; Tigges, C.P.; Phillips, J.M.

Microwave two-port S-parameter measurements and modeling were performed on superconducting flux flow transistors. These transistors, based on the magnetic control of flux flow in an array of high-temperature superconducting weak links, can exhibit significant available power gain at microwave frequencies (over 20 dB at 7-10 GHz in some devices). The input impedance is largely inductive, while the output impedance is resistive and inductive. These devices are potentially useful in numerous applications, including matched amplifiers.< >