Parameterized compact model synthesis based on sonnet electromagnetic analysis data

Sonnet^® can synthesize compact lumped models based on electromagnetic analysis results. Synthesis equations have been derived for 662 two-terminal lumped RLC networks. For a given electromagnetic analysis derived impedance or admittance frequency characteristic, each of the 662 two-terminal networks is synthesized based on data at only a few frequencies. Then, of all the synthesized networks, the network which best matches the frequency characteristic at non-synthesis frequencies is selected. This means that for a 2-port Pi-network, which uses three two-terminal networks, the synthesis solution space includes over 300 million possible topologies. In addition, the resulting compact lumped models can be parameterized. A parameterized lumped model for the input impedance of a planer microstrip dipole illustrates the technique.