HFSS with SBR+

HFSS can use shooting and bouncing ray (SBR) technology to compute the scattered field contribution of defined platform geometry via one-way coupling. This allows you to efficiently calculate installed near-field patterns,far-field patterns and coupling (S-parameters) between antennas in the presence of an electrically large scattering geometry. HFSS integrates shooting bouncing ray (SBR+) analysis in several ways:

• SBR+ Hybrid Regions for HFSS Driven Modal and Driven Terminal solutions.
• SBR+ Solution Types, which permit Parametric Antennas, as well as Parametric Arrays.
• One way link from HFSS Driven Modal or Driven Terminal to SBR+ Designs.
• ACT Toolkit for HFSS to EMA3D Data Link.

HFSS with SBR+ works from within the standard Ansys Electronics Desktop, sharing the GUI and the same 3D modeler and reporting and animation features. HFSS with SBR+ includes:

• Import of Lightweight Geometry for HFSS SBR+ Designs.
• Visual Ray Trace for SBR+ Simulation.
• Select Tx/Rx Antennas for SBR+ Designs.
• Assign Fresnel SBR Perfect Absorber Boundaries.
• Assign a Dielectric or Conducting Material to a Volumetric Region
• SBR Curvature Extraction for Faceted Surfaces.
• SBR+ Range Doppler Solution.
• Creeping Wave for RCS Analysis of Curved Surfaces in SBR+ Simulation.
• Creeping Wave for Antenna Placement on Curved Surfaces in SBR+ Simulation
• Creeping Wave for VRT Plots
• Near Field Analysis in SBR+ Design.
• Exporting ROM Radar to VRXPERIENCE (Beta)

For SBR+ Ray Data Export, you can use Design Settings to specify whether to Export On completion either or both range-doppler data and ray data.

SBR+ accounts for geometry blockage per component antenna instance/source, and allows any type of material assignment (perfect E, dielectric, volume material) for these geometry blockage objects. Use of “non-model” geometry is not necessary as part of the preferred workflow – any geometry that should be considered by the SBR+ simulation will be included in the SBR+ region; any geometry that should not be considered will be explicitly excluded from the SBR+ region by defining blockage lists per excitation.

For the SBR+ region, any model geometry that needs to have this special consideration for model blockage (ignored on first bounce, used on multi-bounce) is assigned as such on a per source antenna basis. This is because the model blockage behavior is executed in the SBR+ simulation on a per source basis.

Using SBR+ with HFSS

For using SBR+ Hybrid regions in an HFSS design, see Assigning SBR+ Hybrid Regions. For the SBR+ Solution type, see the Design Flow for SBR+ Solution Type and SBR+ Range Doppler Solution Setup. For linking HFSS with SBR+, see Link from Driven Modal or Driven Terminal Design to SBR+ Design. For the ACT Toolkit, see HFSS to EMA3D Data Link.

Also see, HFSS: Gregorian Reflector antenna simulation example.