Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses
involving 3D objects of arbitrary shapes.
The terms, dataset, slice, trace and 3D result, are used extensively in the documentation. Review the definitions
to get a better concept of these definitions.
Display result data on a graph to allow visual interpretation of the data in a human-readable format, as well as to
communicate the results in reports and presentations.
POSTFEKO supports three types of graphs, namely Cartesian graph, polar graph and Smith chart. Each graph type represents data in a different way to make it easier to interpret for a given application.
A number of settings are available to customise a graph. From changing the font, font size, adding fill, changing the
marker styling, adding shapes and text boxes, editing the graph title, footer and many more settings to obtain graphs
that suits your styling.
For impedance results and far field results, custom annotations are available that allows you to quickly add annotations relevant
to the data types, for example, reflection bandwidth, transmission bandwidth, beamwidth and sidelobe level.
Create a copy of the graph and change the graph type (if the data is compatible with both). For example, create a
polar graph copy from a Cartesian graph.
A trace is a line plotted on a graph that represents a quantity relative to an independent axis. The styling of the
trace as well as the representation of the data can be manipulated.
View the simulation data in a 3D view to allow visual interpretation of the data in a human-readable format, as well as to communicate the results
in reports and presentations. The 3D view can also be used to verify that the CADFEKO or EDITFEKO model is correct.
The Solver contains a number of frequency domain solution methods, as well as a time domain solution method. By default, all
simulation results are obtained in the frequency domain, unless explicitly using the time analysis tool in
POSTFEKO to convert the results to the time domain.
With the time analysis tool in POSTFEKO, electromagnetic scattering problems can be analysed in the time domain. The time domain results are obtained
by applying an inverse fast Fourier transformation (IFFT) on the frequency domain simulation results.
POSTFEKO is a useful tool to help analyse and present data in a useful format. It is often required to use the processed results
in a report or presentation. To help make it easier to generate these reports, several tools are available
in POSTFEKO.
POSTFEKO has a collection of tools that allow you to quickly validate the model, for example, measure distances, measure
angles and finding specific mesh elements.
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.
Display result data on a graph to allow visual interpretation of the data in a human-readable format, as well as to
communicate the results in reports and presentations.
Use annotations and cursors to read and interpret plotted results.
Annotations
Add an annotation to a trace to
highlight values of interest. The annotation updates along with the data and always display
the value according to its definition.
Cursors
Cursors are dynamic and allow you to
interact and move the cursors. Drag the cursors until they are placed at the desired
positions. Cursors allow data to be read off several traces simultaneously but suffer from the
limitation that it cannot update along with the results.
Note: A Smith chart has a single cursor appearing as a small
table.
Adding Result Specific Annotations
For impedance results and far field results, custom annotations are available that allows you to quickly add annotations relevant to the data types, for example, reflection bandwidth, transmission bandwidth, beamwidth and sidelobe level.
Adding Cursors and a Cursor Table
Use cursors and its cursor table to read and interpret information from a graph. Place cursors at predefined positions.