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POSTFEKO
POSTFEKO, the Feko post processor, is used to display the model (configuration and mesh), results on graphs and 3D views.
Cartesian Surface Graphs
A Cartesian surface graph is a flat colour plot with results plotted against two independent axes.
Locking the Aspect Ratio
Lock the proportional relationship between the independent axes on Cartesian surface graphs to keep the graph dimensions undistorted and true to the 3D model.

Welcome
Release Notes
See what's new in the latest release.
Get Started
The Feko Getting Started Guide contains step-by-step instructions on how to get started with Feko.
Examples
The Feko Example Guide contains a collection of examples that teaches you Feko concepts and essentials.
Introduction to Feko
Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses involving 3D objects of arbitrary shapes.
CADFEKO
CADFEKO is used to create and mesh the geometry or model mesh, specify the solution settings and calculation requests in a graphical environment.
POSTFEKO
POSTFEKO, the Feko post processor, is used to display the model (configuration and mesh), results on graphs and 3D views.
- Introduction to POSTFEKO
  Use POSTFEKO to validate meshed geometry and analyse and post-process results.
- Quick Tour of the POSTFEKO Interface
  View the main elements and terminology in the POSTFEKO graphical user interface (GUI).
- Preferences
  POSTFEKO has various default settings that you can configure to customise it to your preference.
- Rendering Options
  A number of rendering options are available to ensure that 3D models and graphs (containing a large number of sample points) are rendered efficiently.
- Model and Project Basics
  You can add a model, open an existing project and save the project.
- Data Import
  Import text files, native data files and Touchstone format files.
- Data Export
  POSTFEKO supports the export of native file formats. These files can be exported to use in other sessions or when further post-processing is required.
- Terminology
  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.
- Graphs (Cartesian, Polar and Smith Charts)
  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.
- Cartesian Surface Graphs
  A Cartesian surface graph is a flat colour plot with results plotted against two independent axes.
  - Creating a Cartesian Surface Graph
    Create a new Cartesian surface graph for displaying data.
  - Editing a Graph Title, Footer and Axes
    Modify the graph title, graph footer, vertical axis label and horizontal axis label.
  - Enabling Grid Lines and Grid Labels
    Enable the major and minor grid lines for surface graphs as well as the grid labels.
  - Changing the Line Styling
    Change the line style, line colour and line weight of the title, footer or axes from a selected surface graph.
  - Locking the Aspect Ratio
    Lock the proportional relationship between the independent axes on Cartesian surface graphs to keep the graph dimensions undistorted and true to the 3D model.
  - Swopping the Independent Axes
    The two independent axes on a Cartesian surface graph can be interchanged when required.
  - Specifying the Major Axes Range
    Specify the range for the major axes.
  - Reversing the Axis Order
    Change the order in which values are plotted along the axis of a Cartesian surface graph.
  - Storing a Local Copy of a Data Set
    Stores a local copy of the underlying data that is represented by the Cartesian surface graph. By storing a local copy, you can modify the existing model and compare the old results to the new results.
  - Changing the Sampling Settings
    Specify the number of samples for continuous results displayed on surface graphs.
  - Adding a Quick Single Point Annotation
    Read a single point from a Cartesian surface graph result by adding a quick single point annotation.
  - Adding a Custom Point Annotation
    Add a custom point annotation to a Cartesian surface graph to read the value of a point and highlight this point of interest on the graph.
  - Duplicating a Cartesian Surface Graph
    Make a copy of the current Cartesian surface graph complete with all the settings.
  - Legend Range Settings
    Adjust the legend range for the current active surface graph.
  - Scaling and Display Settings
    A number of settings are available that affects how a result is scaled and displayed in a surface graph. These settings influences the colour scaling of the legend and displayed colour range.
  - Exporting Plotted Data to Clipboard or a Text File
    Retrieve the plotted data and save to file.
- 3D Views
  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.
- Frequency Domain Results
  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.
- Time Domain Results
  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.
- Animation
  Use animation to obtain a better understanding of results or export the animation to use in a presentation or report.
- Generating Reports
  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.
- Lua Scripting
  Feko provides a powerful scripting language that allows you to create scripts that control CADFEKO and POSTFEKO.
- Tools
  POSTFEKO has a collection of tools that allows you to quickly validate the model, for example, measure distances, measure angles and finding specific mesh elements.
- Math Functions in POSTFEKO
  View the list of supported math functions.
- Files Generated by POSTFEKO
  View the files associated and generated by POSTFEKO.
- Default Shortcut Keys
  View the shortcut keys available for POSTFEKO for faster and easier operation of POSTFEKO.
EDITFEKO
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.
Feko Solution Methods
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.
Optimisation in Feko
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 Utilities
The Feko utilities consist of PREFEKO, OPTFEKO, ADAPTFEKO, the Launcher utility, Updater and the crash reporter.
Description of the Output File of Feko
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.
Feko Application Macros
A large collection of application macros are available for CADFEKO and POSTFEKO.
Scripts and Application Programming Interface (API)
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.
Appendix
Reference information is provided in the appendix.

Locking the Aspect Ratio

Lock the proportional relationship between the independent axes on Cartesian surface graphs to keep the graph dimensions undistorted and true to the 3D model.

On the Surface contextual tabs set, on the Display tab, in the Axes group, click the Lock aspect ratio icon.
Select one of the following:
- To view the true aspect ratio between the independent axes, click Enable locked aspect ratio. The full graph area is not utilised when displaying the surface graph.
  Figure 1. An example of a near field request where the aspect ratio is locked.
- To resize the independent axes to allow the full graph area to be utilised, click Disable locked aspect ratio.
  Figure 2. An example of a near field request where the aspect ratio is not locked.
- To lock the original aspect ratio for the cases where the independent axes have the same units automatically, click Auto lock aspect ratio.