HFSS Integral Equation (IE) Solver

The HFSS integral equation (HFSS-IE) solver uses the method of moments (MoM) technique to solve for the sources or currents on the surfaces of conducting and dielectric objects in open regions. HFSS-IE is effective for radiation and scattering studies of large, mostly conducting structures. It is available in the industry-standard ANSYS HFSS interface to share geometry, material and certain critical solver technology. As with HFSS, adaptive refinement is used to generate the optimum mesh, giving the user added confidence in the results. The solver uses the adaptive cross-approximation (ACA) method in conjunction with an iterative matrix solver to reduce memory and complexity requirements, allowing this tool to be applied to very large problems.

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Simulation results for 900 MHz blade antenna on unmanned drone


In applications such as antenna placement, you can link HFSS 3-D designs of antennas as sources in an HFSS-IE design using a data link. The source can be created in HFSS, and then, with a few mouse clicks, you can link fields from that simulation into the target HFSS-IE design. In addition, you can include the geometry of the source simulation in the target HFSS-IE design and include its scattering in the final result.

HFSS-IE in combination with HFSS allows design engineers to select the best solver to use for a given situation. In in many cases, users can take advantage of both solvers in a linked project or hybrid solution.

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 .Currents on reflector antenna modeled in HFSS-IE with source simulated in a separate HFSS design. The simulation accurately predicts the induced currents on the feed structure.