Pushing Excitations from Circuit Designs

You can set the excitations in dynamically linked field solver elements from a parent circuit so true electromagnetic field levels can be calculated by the electromagnetic solver (HFSS, SIwave, Planar EM, Q3D). This means the field values calculated by the electromagnetic solver element approximate the true field values when the circuit is active. These calculations are useful for active and passive antenna simulations, EMI/EMC simulations, and signal integrity applications. Ansys calls this "pushing excitations" from a circuit to a field solver.

The procedure used to push excitations differs slightly depending on whether the electromagnetic simulator is in the Ansys Electronics Desktop, as is the case with the HFSS 3D Layout, Planar EM, HFSS, Q3D, and 2D Extractor simulators, or external to the Ansys Electronics Desktop, as is the case with SIwave.

To begin, insert a Planar EM, HFSS, Q3D, or SIwave model into a circuit using the techniques described in previous topics. While the circuit/field-solver combination can be simulated immediately and S-parameters can be extracted, some additional setup is required to view field values in the field solver element.