In the latest HFSS2015, there are a total of five algorithm solvers for HFSS, as shown below:
The full name of HFSS-IE is the integral equation method solver, which is an electromagnetic field solver based on the full-wave integral equation. The solver uses a surface mesh to solve the current on the surface of the conductor and the dielectric model, due to HFSS-IE. The air box needs to be additionally drawn and meshed and calculated, so the radiation and scattering problems of the development space can be efficiently solved, and it is especially suitable for calculating large-scale open domain problems. The main features of the HFSS-IE solver are as follows:
Support unlimited ground plane settings;
There is no need to set additional absorption boundary conditions;
A cutout graphic can be used as a reference;
Support single point discrete sweep and interpolation sweep;
Support HFSS field presence links.
The IE solver compares the efficiency of the large size structure with the FEM solver as shown below:
As can be seen from the above figure, the IE solver has a significant improvement in the solution efficiency compared to the FEM solver in solving the development problem of the large size. Therefore, the IE solver is very suitable for aircraft, ship RCS analysis, antenna layout, reflector antenna analysis and so on.
HFSS-IE Solver Usage Guide:1. Create a new Project file and add HFSS-IE Design:
2. Model parametric modeling. Note that there is no need to draw the Air Box separately in HFSS-IE!
In addition to the fact that there is no need to draw an Air Box accident, there is no Curvilinear mesh type in HFSS-IE, so the surface will be approximated by a multi-segment polyline according to the settings in the Surface ApproximaTIon option. In addition, HFSS-IE only supports isotropic materials and does not support ferrite materials.
3. Assign values ​​and boundary conditions to materials:
The boundary conditions supported in HFSS-IE are as follows:
As can be seen from the above figure, the HFSS-IE has fewer boundary conditions. The boundary condition of the Infinite Ground Plane must be set parallel to the XY plane. The Z LocaTIon option can be used to adjust its position in the Z-axis direction. In addition, the Infinite Ground Plane boundary condition can be achieved by setting the Aperture boundary condition to achieve the effect similar to the opening on the metal. It is important to note that only the metal material (such as copper, ideal conductor, etc.) can be selected in the Select Material option of HFSS-IE.
4. Set the port and incentives:
The excitation in HFSS-IE can only be set to Terminal Lumped Gap Port and Incident Wave. The specific setting method is consistent with the main interface of HFSS. By setting the Incident Wave port, you can use Data Link to link the far-field and near-field radiation data calculated in HFSS as an excitation source to the HFSS-IE to achieve field-to-field collaborative analysis, as shown below:
5. Set the solution conditions:
The solution setting interface of HFSS-IE is basically the same as HFSS, except that there are fewer options, as shown below:
It should be noted that the HFSS-IE does not support the fast sweep mode. In the case of table meshing, the HFSS-IE will take into account the wavelength subdivision parameters (Lambda Refinement), for the surface of the medium, corresponding to the electromagnetic wave in the medium. The wavelength in the medium; for the conductor, it corresponds to the wavelength of the electromagnetic wave propagating in the surrounding medium.
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