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.
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.
Calculate the input reflection coefficient and circular components of a left-handed circular polarised GPS patch antenna
on a finite substrate close to 1.57 GHz.
Use macro recording to record actions in a script. Play the script back to automate the process or view the script to learn
the Lua-based scripting language by example. Macro recording allows you to perform repetitive actions faster and with less effort.
Define a lossy frequency-independent dielectric with a relative permittivity () = 5.6 and a dielectric loss tangent () = 0.0041 to be used as the patch substrate.
Union the geometry (feed_line, patch and substrate) to create a single geometry part. A single geometry part will ensure mesh connectivity when the model is meshed.
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.
Specify the frequency range of interest. For this example continuous frequency sampling is used where Feko automatically determines the frequency sampling for optimal interpolation.
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.
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.
Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses
involving 3D objects of arbitrary shapes.
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.
Activating Macro Recording of Model Use macro recording to record actions in a script. Play the script back to automate the process or view the script to learn the Lua-based scripting language by example. Macro recording allows you to perform repetitive actions faster and with less effort.
Defining a Dielectric Medium
Define a lossy frequency-independent dielectric with a relative permittivity () = 5.6 and a dielectric loss tangent () = 0.0041 to be used as the patch substrate.
Unioning the Geometry for Mesh Connectivity
Union the geometry (feed_line, patch and substrate) to create a single geometry part. A single geometry part will ensure mesh connectivity when the model is meshed.
Setting Faces to PEC
Change the surface property of the patch to perfect electric conductor (PEC).
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 Simulation Frequency
Specify the frequency range of interest. For this example continuous frequency sampling is used where Feko automatically determines the frequency sampling for optimal interpolation.
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.
Deactivating Macro Recording
Deactivate the macro recording of the model, inspect the resulting FekoLua script and use the script to recreate the model.