Fluxon propagation in long overlap Josephson junctions

Abstract We report here the first preliminary results of an experimental and theoretical study of long Josephson junction behaviour to assess the applicability of the recently developed fluxon propagation formalism to a real experimental situation. The frequency dependence of the microwave radiation emitted by long, overlap junctions (including changes induced by externally-applied magnetic fields) has been measured and is found to be in good agreement with the numerically calculated response of the junction.