Transient analysis of IMPATT oscillator with extended spectral-element time-domain method

The microwave IMPATT oscillator is analyzed by a hybrid electromagnetic-circuit simulator, which is based on the spectral-element time domain (SETD) method. In the space of electromagnetic, the IMPATT diode is substituted by a one-port equivalent circuit. At each time step, the change of current on diode will influence the field around it, and vice versa. For the extended SETD method, the solver is fully explicit, so the CPU time can be significantly reduced. A simple numerical result demonstrates the ability and effectiveness of the extended SETD method for the fast analysis of microwave IMPATT Oscillator.