Minimizing the linewidth of the flux-flow oscillator

Abstract

The linewidth of the flux-flow oscillator has been calculated by direct computer simulation of the sine-Gordon equation with noise. Good agreement of the numerical results with the formula derived in Phys. Rev. B 65, 054504 (2002) has been achieved. Depending on the length of the unbiased tail, the power may be maximized and the linewidth may be minimized in a broad range of bias currents. The linewidth can be decreased further by 1.5 times by proper load matching. © 2008 American Institute of Physics.