Home
Examples
The Feko Example Guide contains a collection of examples that teaches you Feko concepts and essentials.
Antenna Placement
Simple examples demonstrating antenna placement.
Antenna Coupling Using an Equivalent Source and Ideal Receiving Antenna
Calculate the coupling between two horn antennas separated by 60 wavelengths. A metallic plate between the horn antennas blocks the line-of-sight coupling. Replace the horn antennas with a far field equivalent source and ideal far field receiving antenna.

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.
- Example Summary
  View a summary of the examples in the Feko Example Guide.
- Antenna Synthesis and Analysis
  Simple examples demonstrating antenna synthesis and analysis.
- Antenna Placement
  Simple examples demonstrating antenna placement.
  - Antenna Coupling on an Electrically Large Object
    Calculate the S-parameters (coupling) over a frequency range for three monopole antennas located near the front, middle and rear of a Rooivalk helicopter mock-up.
  - Antenna Coupling Using an Ideal Receiving Antenna
    Calculate the coupling between a helix antenna and a Yagi-Uda antenna located in front of a large plate. Reduce computational resources by using the uniform theory of diffraction (UTD) and an ideal receiving antenna.
  - Antenna Coupling Using an Equivalent Source and Ideal Receiving Antenna
    Calculate the coupling between two horn antennas separated by 60 wavelengths. A metallic plate between the horn antennas blocks the line-of-sight coupling. Replace the horn antennas with a far field equivalent source and ideal far field receiving antenna.
    - Solving the Horn Antenna to Obtain the Fields
      Calculate the far field of the horn antenna. Export the fields to file to use as far field equivalent source and ideal receiving antenna.
    - Solving the Equivalent Sources Model
      Calculate the antenna coupling between two horn antennas represented by a far field equivalent source and an ideal receiving antenna.
    - Obtaining a Full Wave Reference Solution
      Calculate the coupling between two horn antennas. Use the full models of both antennas to obtain a reference solution.
    - Viewing the Results
      View and post-process the results in POSTFEKO.
- Radar Cross Section (RCS)
  Simple examples demonstrating radar cross section (RCS) calculations of objects.
- EMC Analysis and Cable Coupling
  Simple examples demonstrating electromagnetic compatibility (EMC) analysis and cable coupling.
- Waveguide and Microwave Circuits
  Simple examples demonstrating using waveguides and microwave circuits.
- Bio Electromagnetics
  Simple examples demonstrating phantom and tissue exposure analsysis.
- Time Domain
  A simple example demonstrating the time analysis of an incident plane wave on an obstacle.
- Special Solution Methods
  Simple examples demonstrating using continuous frequency range, using the MLFMM for large models, using the LE-PO (large element physical optics) on subparts of the model and optimising the waveguide pin feed location.
- User Interface Tools
  Simple examples demonstrating using Feko application automation, matching circuit generation with Optenni Lab and optimising a bandpass filter with HyperStudy.
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.

Antenna Coupling Using an Equivalent Source and Ideal Receiving Antenna

Calculate the coupling between two horn antennas separated by 60 wavelengths. A metallic plate between the horn antennas blocks the line-of-sight coupling. Replace the horn antennas with a far field equivalent source and ideal far field receiving antenna.

Three models are provided for this example. The creation steps are not provided, but the models are included in the installation.

Pyramidal_Horn.cfx: Model of the horn antenna on its own. The far field pattern will be used in the equivalent source and ideal receiving antenna.
Full_Model.cfx: Full model of two horn antennas and plate.
Point_Source_Coupling.cfx: Model that calculates the antenna coupling using the far field equivalent source and ideal receiving antenna.

Figure 1. The model using equivalent source and receiving antenna.

Tip: Find the completed models in the application macro library¹.

¹ The application macro library is located on the Home tab, in the Scripting group. Click the Application Macro icon and from the drop-down list, select Example Guide.