Exporting S-Matrices for Full-Wave SPICE Analysis

Significant coupling, that occurs in closely located circuits reaching frequencies above one GHz, can be included in circuit analysis. When S-parameter data calculated by the Ansys Electronics Desktop (AEDT)^TM electronics systems design platform is exported to PSpice, HSpice, and Maxwell Spice software, transformation data between voltages and currents is constructed. This transformation data is based on the S-parameter data; therefore full-wave effects can be modeled in the circuit analysis.

When S-parameter data is exported from AEDT to PSpice or HSpice, AEDT creates an equivalent circuit. The circuit is represented by an N-port with input and output terminals. It includes the same frequency response behavior as the original device analyzed in AEDT. Frequency domain information from AEDT is transferred to circuit simulators that operate in the time domain. Broadband matching of frequency responses is ensured while the full-wave solution accuracy is preserved. When S-parameter data is exported from AEDT to Ansys’s Maxwell Spice software, AEDT creates a new “full-wave N-port subcircuit”. This subcircuit is also represented by an N-port that includes the same frequency response behavior as the original device.