Theoretical and experimental investigations of cascaded oscillator networks using tunnel diodes were carried out. The dependence of the output waveform characteristics on the device- and circuit-parameters and the operating conditions, as well as, the stabilizing network were investigated. A computer aided design technique was achieved to solve the cascaded oscillator general equations and criterion condition for self-starting oscillation. From which, it is clearly noticed that connecting several tunneling diodes in series and parallel networks promise as a method for increasing frequency and output power of these devices as millimeter wave oscillators. On the other hand, a maximum output frequency of 5.10 MHz was obtained applying three cascading stages system. (C) 2002 Elsevier Ltd. All rights reserved.