The characteristics of output radiation of gyro-amplifiers (such as gyroklystron and helical waveguide gyro-TWT) with delayed feedback and gyrotron, operated at the regime of high exceeding of the threshold, were studied. It was shown, that this devices could produce wideband chaotic oscillations with a relative spectrum width up to 10% at the millimeter wavelength. In all cases these regimes are referred to as hyperchaos.
05.45.Jn High-dimensional chaos
$^1$Institute of Applied Physics RAS\
$^2$Saratov State University\
$^3$Kotel’nikov Institute of Radio Engineering and Electronics of RAS, Saratov Branch