HFSS SBR+ Hybrid Reflector Antenna Simulation Example

Description - HFSS SBR+ can provide significant time and memory savings for computing large reflector interaction. Most asymptotic solvers hybridize only to MoM codes. HFSS SBR+ hybridizes to both FEM and IE methods simultaneously. HFSS SBR+ can be hybridized to FEBI and IE Regions. FEBI or IE Regions may have sources, or be source-free regions. In this example, all full wave regions are first pre-computed, then applied to SBR+ Regions. All full wave regions (FEBI, IE) are considered independently. In practice, closely-spaced (near field) full wave regions should be grouped so that their 2-way couplings are considered prior to hybridization to SBR+ Region. Results exhibit comparable accuracy to IE simulations.

HFSS SBR+ Hybrid Reflector Antenna

 

Model - The model is a 10 GHz Gregorian reflector system created with the Antenna Design Toolkit that is embedded with HFSS in the Ansys Electronics Desktop. The horn is set to FEBI, and the reflectors are set to IE Hybrid Regions. The largest reflector is changed to SBR+ Hybrid Region.

HFSS Antenna Toolkit Dialog and Gregorian reflector system model.

Full-wave meshing should be used for reflectors close to feed apertures.

Large reflector can use HFSS SBR+ to speed up simulation dramatically

Set Two-way Interactions for full wave hybrid regions- •By default, full-wave regions will operate on the SBR+ Region independently.​ We want the FEBI and IE Regions to be simulated as coupled *before* applying them together to the SBR+ Region.​

Hybrid Regions right-click menu. Set SBR + Source Regions option highlighted, Set SBR + Source Resgions dialog. ​

Results: If you compare a FEBI + IE Regions simulation with a Hybrid FEBI + IE + SBR+, there is excellent agreement. Using SBR+ reduces the overall simulation time (including FEB/FEBI and IE meshing by 63%.

Gain Total plot. ​