THE OBSERVATION OF SUBHARMONIC PECULIARITIES OF I-V CHARACTERISTIC OFEDGE-TYPE JOSEPHSON-JUNCTION CHAINS PLACED IN MICROWAVE RESONATOR

The spectrums of own Josephson radiation and I-V characteristics of on e-dimensional chains of edge-type Nb Josephson junction placed into mi crowave resonator have been studied, The interaction with the external resonator caused synchronization of junctions forming the chain, This effect was detected experimentally, In the hysteresis region of I-V c haracteristic we have Found the presence of own radiation area, Its bo unds are determined by the value of junctions characteristic voltage a nd are practically independent from the value of chain bias voltage, T he studies of negative differential resistance region of I-V character istic shows the presence of thin structure which may be interpreted as a set of subharmonic steps caused by the coupling of Josephson juncti on own radiation with external microwave resonator.