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Examples
The Feko Example Guide contains a collection of examples that teaches you Feko concepts and essentials.
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 Application Automation
Use application automation to perform operations with CADFEKO and POSTFEKO. Typical tasks include repetitive tasks, tasks that require several steps, or calculations.
Example: Post-Processing the Results
Post-process the results of a patch antenna on a multilayer substrate.
Adding a Far Field Result Trace to A Cartesian Graph
Create a Cartesian graph and add a far field result trace, change the independent and fixed axes, quantities and format the graph.
Modifying the Quantities of a Far Field Result Trace
Change the far field trace axis to dB.

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.
- 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 Application Automation
    Use application automation to perform operations with CADFEKO and POSTFEKO. Typical tasks include repetitive tasks, tasks that require several steps, or calculations.
    - Automation Terminology
      Learn the terminology of automation to create an automation script.
    - Navigate the API Documentation
      Learn to navigate the API documentation to find the correct syntax for an automation script.
    - Example: Patch Antenna on a Planar Multilayer Substrate
      Learn to navigate the API documentation to create a patch antenna using an automation script.
    - Example: Post-Processing the Results
      Post-process the results of a patch antenna on a multilayer substrate.
      - Creating a New POSTFEKO Project
        Define a new POSTFEKO project and open a .fek file.
      - Getting a Handle on the Far Field Result
        Get a handle on the far field result in the far field collection.
      - Adding a Far Field Result Trace to A Cartesian Graph
        Create a Cartesian graph and add a far field result trace, change the independent and fixed axes, quantities and format the graph.
        Adding a Cartesian Graph
        Add a Cartesian graph to the project.
        Adding a Result Trace to a Cartesian Graph
        Add a trace (for this example, a far field result) to a Cartesian graph.
        Changing the Axes of the Trace (Independent and Fixed)
        Set the independent axis of the far field trace to Phi and the fixed axis to Theta = 30°.
        Modifying the Quantities of a Far Field Result Trace
        Change the far field trace axis to dB.
        Formatting the Graph
        Change the font size for both the vertical axis and horizontal axis to 12.
      - Script
        View the completed POSTFEKO automation script.
  - Automatic Report Generation Using API
    Increase productivity when dealing with predictable and repeatable POSTFEKO sessions (for example, exporting a report) using application automation. Use an automation script to configure a session and export a report that highlights the antenna properties of the model.
  - Using Altair HyperStudy with Feko to Optimise a Bandpass Filter
    Design a bandpass coupled line filter with Altair HyperStudy as optimisation engine and Feko as the computational solver.
  - Matching Circuits Generation with Optenni Lab
    Design matching antenna circuits with Optenni Lab and use the circuit in Feko.
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, 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.

Modifying the Quantities of a Far Field Result Trace

Change the far field trace axis to dB.

myFarFieldTrace.Quantity.ValuesScaledToDB = true

Figure 1. The quantity panel in the result palette.

Search for the FarFieldQuantity object in the Help¹.
In the Help under FarFieldQuantity > Property List, search for a property applicable to changing the trace values to dB:
- ValuesScaledToDB
In the Help, under FarFieldQuantity > Usage locations, note the following:
```
FarFieldTrace object has property Quantity.
```
The result is then:
```
Quantity.ValuesScaledToDB = true
```
Since we already has a handle on the far field trace, the result is:
```
myFarFieldTrace.Quantity.ValuesScaledToDB = true
```

¹ The API is available in the Feko Scripting and API Reference Guide (PDF) or Feko WebHelp.