Meaning
Computational analysis tool that calculates the distribution of electric and magnetic fields by solving Maxwell’s equations for complex geometries. An electromagnetic field solver provides precise data on parasitic inductance and capacitance in high speed interconnects. Simulation structures allow engineers to predict the behavior of signals in 3D structures like vias and connectors before physical prototyping.
Modeling Accuracy
The use of a full wave electromagnetic field solver is necessary when the wavelength of the signal is comparable to the physical dimensions of the circuit. Approximations used in simpler tools fail to capture the complex coupling and radiation effects at millimeter wave frequencies. This tool extracts the S-parameters needed for accurate system level simulations.
Computational Method
Finite element analysis or the method of moments are the typical algorithms used to discretize the physical space into a mesh. Each cell in the mesh represents a set of equations that the electromagnetic field solver evaluates to determine the field strength. Mesh density determines the balance between the precision of the result and the time required for the calculation.
Design Optimization
Iterating on the shape of a trace or the size of a ground plane based on the solver’s output improves the performance of the final product. Solver data identifies resonance points and crosstalk hotspots that are not visible through standard circuit simulation. This data guides the placement of shielding and the routing of critical high speed differentials.
