Noise effect in oscillators using multiple active devices connected in series or in parallel
Takahiro Saito, Toshiyuki Takagi, K. Mano · Proceedings of the IEEE · 1972
The effect of noise in an IMPATT or Gunn diode oscillator on a phase or frequency fluctuation can be reduced when the oscillator is constructed of multiple diodes connected in series, compared with the oscillator using a single diode.