Home
Get Started
The Feko Getting Started Guide contains step-by-step instructions on how to get started with Feko.
EMC Coupling
The example considers the coupling between a typical monopole antenna and a loaded transmission line above a ground plane.
Creating the Model in CADFEKO
Create the model geometry using the CAD component, CADFEKO.
Setting the Simulation Frequency
Specify the frequency range of interest. For this example continuous frequency sampling is used where Feko determines the frequency sampling for optimal interpolation automatically.

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.
- Creating a Rectangular Horn
  The example is intended for users with no or little experience with CADFEKO. It makes use of a completed rectangular horn model to familiarise yourself with model creation in CADFEKO and viewing the simulated results in POSTFEKO.
- Creating CADFEKO Models
  The example is intended for users with no or little experience with CADFEKO. This example is not an example intended for simulation, but rather to familiarise yourself with model creation in CADFEKO.
- GPS Patch Antenna
  The example considers a left-handed circular polarised GPS patch antenna on a finite substrate.
- GPS Patch on Quadcopter
  The example considers the antenna placement of a GPS patch antenna on a quadcopter.
- EMC Coupling
  The example considers the coupling between a typical monopole antenna and a loaded transmission line above a ground plane.
  - Example Overview
    Consider the coupling between a monopole antenna and a loaded transmission line above a ground plane.
  - Topics Discussed in Example
    Before starting this example, check if the topics discussed in this example are relevant to the intended application and experience level.
  - Example Prerequisites
    Before starting this example, ensure that the system satisfies the minimum requirements.
  - Creating the Model in CADFEKO
    Create the model geometry using the CAD component, CADFEKO.
    - Launching CADFEKO (Windows)
      There are several options available to launch CADFEKO in Microsoft Windows.
    - Launching CADFEKO (Linux)
      There are several options available to launch CADFEKO in Linux.
    - Creating a Monopole
      Create a monopole antenna as a single line element with a local wire radius. Zoom to extents and hide the main axes to view the full-length monopole in the 3D view.
    - Creating a Transmission Line
      Create a transmission line using a polyline curve with four corners. The length of the polyline is 12 m along the Y axis, placed 50 mm above ground.
    - Defining an Infinite Ground Plane
      Define a perfectly conducting (PEC) infinite ground plane. An infinite ground plane is an efficient method to model a large ground plane compared to a discretised, finite sized ground plane.
    - Ports, Sources and Loads in CADFEKO
      Voltage sources and discrete loads are applied to ports and not directly to the model geometry or mesh. A port must be defined before a source or load can be added.
    - Setting the Radiated Power Level
      Specify the power settings to scale the radiated power.
    - Setting the Simulation Frequency
      Specify the frequency range of interest. For this example continuous frequency sampling is used where Feko determines the frequency sampling for optimal interpolation automatically.
    - Modifying the Auto-Generated Mesh
      When the frequency is set or local mesh settings are applied to the geometry, the automatic mesh algorithm calculates and creates the mesh automatically while the GUI is active using default mesh settings. When required, these mesh settings may be modified.
    - Setting a Local Wire Radius for the Monopole
      Specify a local wire radius for the monopole.
    - Saving the Model
      Save the model to a CADFEKO.cfx file.
  - Launching the Solver
    Launch the Solver to calculate the results. No requests were added to this model since impedance and current information are calculated automatically for all voltage and current sources in the model.
  - Viewing the Results in POSTFEKO
    Display the model as well as the results using the post-processor component, POSTFEKO.
  - Final Remarks
    This example showed the construction, configuration and solution of an EMC coupling scenario. The model consists of a monopole antenna and transmission line on an infinite PEC ground plane. Coupling of current into the transmission line is viewed from 1 MHz to 30 MHz.
- Waveguide Power Divider
  The example considers the transmission and reflection coefficients of a waveguide power divider.
- Optimisation of Bent Dipole and Plate
  The example considers the optimisation of the gain of a bent dipole in front of a plate.
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.
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.

Setting the Simulation Frequency

Specify the frequency range of interest. For this example continuous frequency sampling is used where Feko determines the frequency sampling for optimal interpolation automatically.

On the Source/Load tab, in the Settings group, click the Frequency icon.
On the Solution Frequency dialog, select Continuous (interpolated) range from the drop-down list.

Specify the frequency range between 1 MHz and 30 MHz.

Enter the start frequency and end frequency.
- Start frequency (Hz): 1e6
- End frequency (Hz): 30e6
Figure 1. The Solution Frequency dialog.
Click OK to specify the frequency and to close the dialog.