"Non-Josephson" radiation from the cavity containing a superconducting point contact junction

The results of experimental investigation of "non-Josephson" radiation from the X-band cavity containing the Nb-Nb superconducting point contact junction are discussed. Experimental dependences of the amplitude and frequency of "non-Josephson" oscillations on the bias voltage across the junction and modifying of the I-V-characteristic (IVC) of the junction under action of these oscillations are presented. The comparison of the results with theoretical calculations is made. It is shown that the influence of fluctuations on phenomenon characteristics is considerable.