HFSS Setup: Advanced Meshing Tab

Click the Advanced Meshing tab of the HFSS Setup window to access the following settings.

• Circle and arc approximation: circles and arcs must be replaced with straight edge approximations before meshing. There is no attempt to match areas. Points are introduced on the original arc at the locations specified by the following parameters.

• Arc step size: the angular interval below which mesh points are added.
  • Starting azimuth for circles: specifies the location of the first mesh point or circles.
  • Maximum number of arc points: the maximum number of mesh points on a given arc segment.
  • Use arc to chord error approximation technique for arc: the resulting straight edge approximation deviate from the original arc by more than the specified error.
    • Maximum arc to chord error: maximum distance permissible between a straight edge approximation (the chord) and the original arc.

• Hierarchical Layer Alignment: aligns layers across hierarchical boundaries.

  • Snap tolerance: When layers across hierarchical boundaries are within this unitless tolerance, they are aligned to the same elevation. This value represents a fraction of total stackup height.
  • Signal layers thinner than <value> are modeled as zero thickness: enter a value. Negative signal layers in the design which are thinner than the value are modeled as being infinitely thin in order to reduce simulation time.
  • Dielectrics thinner than <value> are merged with an adjacent: enter a value. Dielectric layers in the design which are thinner than the value are merged into an adjacent dielectric. Material properties are accumulated using a weighted average.