Simulation of reactive components by the TLM method.

Abstract

Several new models for the simulation of nonlinear components have been developed in this thesis. Firstly, the model of the stub terminated with a constant capacitance is established. Simulations of a lumped capacitance connected to a transmission line, as well as modelling of relative permittivity can be done by this approach. Secondly, the algorithm for the modelling of voltage-dependent capacitance is developed based on the model of the stub terminated with variable capacitance. Thirdly, a configuration for the simulation of series capacitance in the TLM mesh is derived. The scattering matrix and the transmission formula for the structure are developed. The structure can also be used to simulate series-connected varactor diodes. Finally, the simulation of a varactor diode is performed in the three-dimensional expanded-node scheme. In order to show the application of different models, some examples, simulation results and discussions are given in this thesis.