The effect of the application of an ac external electromagnetic field to a long Josephson junction is studied by analyzing the spectrum of the radiation emitted by the junction. In the absence of the external field the junction, biased on a dc current singularity of the current-voltage characteristic, emits radiation at a frequency ƒ0 in the X-band of the microwaves. The application of an external ac field having a frequency ƒm of the order of several megahertz gives rise to the appearance of spectral components at frequencies ƒ0±nƒm, with n integer. The experimental results are described reasonably well by classical FM modulation theory.
Frequency modulation of fluxon oscillations
PACE, Sandro;PAGANO, Sergio
1987-01-01
Abstract
The effect of the application of an ac external electromagnetic field to a long Josephson junction is studied by analyzing the spectrum of the radiation emitted by the junction. In the absence of the external field the junction, biased on a dc current singularity of the current-voltage characteristic, emits radiation at a frequency ƒ0 in the X-band of the microwaves. The application of an external ac field having a frequency ƒm of the order of several megahertz gives rise to the appearance of spectral components at frequencies ƒ0±nƒm, with n integer. The experimental results are described reasonably well by classical FM modulation theory.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
