Computer aided optimum design of broadband microwave VCO's

Microwave solid-state voltage-controlled oscillators (VCOs) are the keystone components in various microwave systems. Thus far, achievements in practical realisation of such circuits rely on measured data or approximate equivalent circuit models of the solid-state devices. In this contribution, a new overall computer aided optimum design program for transferred electron VCOs is presented. The established program is based on the optimisation of the coupling between the transferred-electron device (TED) and the tuning device for wide tuning bandwidth. Practical realisation has been carried out at J-band and comparison between simulation and experimental results shows excellent agreement.