Abstract :
The low-frequency open circuit noise spectral density S(f) of an ion-implanted 60-GHz double-drift-region IMPATT diode was measured as a function of the dc avalanche current I0. Over an intermediate current range the noise follows an S(f)=a2VB02/I0relationship where VB0is the reverse breakdown voltage and a2≃4.5 × 10-20A/Hz.