Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses
involving 3D objects of arbitrary shapes.
3D views are used to display and interact with the model. You can zoom, rotate and pan around a 3D model using the keyboard,
mouse or a combination of both. You can use a 3D mouse, specify a view or select specific parts of a model. Multiple 3D
views are supported.
Define field or current data using either far field data, near field data, spherical mode data or PCB current data. Use
the field/current definition when defining an equivalent source or a receiving antenna.
Define a medium with specific material properties, import a predefined medium from the media library or add a medium from
your model to the media library.
Defined media can be applied to the model in various ways. Some media settings are applied to regions, others on faces
and wires. The rules for defining media varies between the different solution methods.
Use a periodic boundary condition (PBC) to analyse infinite periodic structures. A typical application of PBC is to
analyse frequency selective surface (FSS) structures.
Create an arbitrary finite antenna array that consists of an array of contributing elements, either with direct feeds for
each element or via indirect coupling, and solve with the efficient domain Green's function method (DGFM).
Use the windscreen tools to define a curved reference surface constrained by a cloud of points, normals and optional U′V′ parameters. The constrained surface is then used as a reference to create a work surface where windscreen layers and curved
parameterised windscreen antenna elements can be created.
Many electromagnetic compatibility and interference problems involve cables that either radiate, irradiate or cause coupling
into other cables, devices or antennas. Use the cable modelling tool and solver to analyse the coupling and radiation.
For a frequency domain result, the electromagnetic fields and currents are calculated at a single frequency or frequency
range. When the finite difference time domain (FDTD) solver is used, the frequency must be specified to convert the native time domain results to the frequency domain.
The excitation of an antenna is normally specified as a complex voltage, but it may be useful to specify the total radiated
or source power instead. The result is then scaled to yield the desired source power level.
A port is a mathematical representation of where energy can enter (source) or leave a model (sink). Use a port
to add sources and discrete loads to a model.
Obtain multiple solutions for a single model using multiple configurations. Multiple configurations remove the requirement
to create multiple models with different solution requests.
Use an infinite plane or half-space to model a ground plane efficiently. The number of triangles in the model is reduced
as the ground plane is not discretised into triangles.
A CADFEKO.cfm file can be imported into EDITFEKO to make use of more advanced features available in EDITFEKO and to directly edit the .pre file for more flexible solution configurations.
During the design process, the development of a model can introduce a range of issues that can lead to a non-simulation-ready
model. Use the validation toolset to verify that the model is simulation-ready or to search, detect and flag discrepancies.
Before running the Solver, run the CEM validate tool to perform basic consistency checks on the model. These checks are largely related to
basic electromagnetic modelling rules and limitations (but not mesh parameters).
When defining a windscreen, the layer thickness is not displayed by default. Enable the windscreen layer thickness
to visually verify that the model is correct.
A cutplane is a display option that creates a plane at a designated location that cuts through an object to create a sectional
view. Create multiple cutplanes to create a sectional view that exposes inner details that would otherwise not be visible
from outside the model.
Before running the Solver, you can verify that the correct solution settings are applied to the geometry. Use the tool to highlight all the relevant
geometry in the 3D view with a specific solution method applied.
After applying union or stitching operations, you can verify that all the intended edges are connected. A face with unbounded
edges is an indication of unconnected mesh.
Parts clash if there is contact between the parts (but without making an electrical contact) or if one is completely
inside another. These disconnected mesh elements need to be either connected or removed before running a simulation
to obtain an accurate result.
A distorted mesh element is a distorted (high aspect ratio) triangle. Distorted mesh elements can result in decreased
accuracy of the results and could lead to poor convergence for iterative solvers.
Areas of poor mesh quality in imported meshes often contains intersecting mesh elements. These intersecting mesh elements
need to be either repaired or removed before running a simulation to obtain an accurate result.
An oversized mesh element is a triangle with an edge length larger that the specified maximum edge length. Oversized
mesh elements can result in reduced accuracy in the simulated results.
The default solver used in Feko is the method of moments (MoM) - surface equivalence principle (SEP). Whether a solver is specified per model, per face or per region, depends on the solver in question.
CADFEKO has a collection of tools that allow you to quickly validate the model, for example, perform calculations using
a calculator, measure distances, measure angles and export images.
EDITFEKO is used to construct advanced models (both the geometry and solution requirements) using a high-level scripting language
which includes loops and conditional statements.
One of the key features in Feko is that it includes a broad set of unique and hybridised solution methods. Effective use of Feko features requires an understanding of the available methods.
Feko offers state-of-the-art optimisation engines based on generic algorithm (GA) and other methods, which can be used
to automatically optimise the design and determine the optimum solution.
Feko writes all the results to an ASCII output file .out as well as a binary output file .bof for usage by POSTFEKO. Use the .out file to obtain additional information about the solution.
CADFEKO and POSTFEKO have a powerful, fast, lightweight scripting language integrated into the application allowing you to create
models, get hold of simulation results and model configuration information as well as manipulation of data and automate
repetitive tasks.
During the design process, the development of a model can introduce a range of issues that can lead to a non-simulation-ready
model. Use the validation toolset to verify that the model is simulation-ready or to search, detect and flag discrepancies.
Parts clash if there is contact between the parts (but without making an electrical contact) or if one is completely
inside another. These disconnected mesh elements need to be either connected or removed before running a simulation
to obtain an accurate result.
Parts clash if there is contact between the parts (but without making an electrical
contact) or if one is completely inside another. These disconnected mesh elements need to be
either connected or removed before running a simulation to obtain an accurate
result.
Select the model or geometry part either in the model tree
or 3D view.
On the Mesh tab, in the
Find group, click the Clashing geometry icon.
Figure 1. The Find clashing geometry elements
dialog.
Specify the parts to be searched for clashing geometry elements.
To search the full model, under Search, click
Entire model.
To search only the selected part of the model, under
Search, click
Selection.
Click Find to search for clashing geometry elements and
to close the dialog.
The result of the search is displayed in the message window. Any parts containing clashing geometry are selected in
the details tree and in the 3D view. A hyperlink
to the part containing the clashing geometry is also given in the message window.