Example 2: Missile
In this example the view direction and cross-range resolution of the ISAR image is changed by using a subset of the angular data range. Some of the script's post-processing options are demonstrated.
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The Feko Getting Started Guide contains step-by-step instructions on how to get started with Feko.
The Feko Example Guide contains a collection of examples that teaches you Feko concepts and essentials.
Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses involving 3D objects of arbitrary shapes.
CADFEKO is used to create and mesh the geometry or model mesh, specify the solution settings and calculation requests in a graphical environment.
POSTFEKO, the Feko post processor, is used to display the model (configuration and mesh), results on graphs and 3D views.
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.
The Feko utilities consist of PREFEKO, OPTFEKO, ADAPTFEKO, the Launcher utility, Updater and the crash reporter.
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.
A large collection of application macros are available for CADFEKO and POSTFEKO.
An application macro is a reference to an automation script, an icon file and associated metadata.
The application macro library allows commonly used application macros to be stored in a repository.
A collection of Lua application macros are available to automate repetitive tasks in CADFEKO.
A collection of Lua application macros are available to automate repetitive tasks in POSTFEKO.
The MRI application macro computes , , their ratio and the intrinsic signal-to-noise ratio (ISNR) for magnetic resonance imaging (MRI) investigations in POSTFEKO.
The radiation phase centre is a useful quantity to calculate, especially for reflector antennas. The phase centre calculation is not available in Feko by default, but a stand-alone application macro is available that can be used to calculate the phase centre of a calculated far field.
This POSTFEKO application macro can be used to plot all the standard parameters that are available after a characteristic mode analysis simulation was performed.
This application macro is used for calculating mean effective gain (MEG) and envelope correlation coefficient (ECC) for a MIMO antenna configuration. The MEG ratio can also be plotted.
The Multiport post-processing application macro allows you to calculate results for changes in the port loading without rerunning the Solver. Results that are supported are far fields, near fields, currents and specific port parameters, for example, the voltage, current and S-parameters of each port.
Plot multiport S-parameter results.
This application macro computes and displays an inverse synthetic aperture radar (ISAR) image from backscattered radar cross-section (RCS) data.
The application macro computes and displays an inverse synthetic aperture radar (ISAR) image from the backscattered radar cross-section (RCS) data over frequency and angle.
Backscattered RCS data must be in the UV plane of the local coordinate system or the XY plane of the global coordinate system. Equivalently, the backscattered RCS should be requested in the cut. Sub-ranges of the total angular phi range could be used to change the viewing angle.
In this example the view direction of the ISAR image is changed using the local workplane of the incident plane wave excitation. It is also possible to change the view direction and cross-range resolution of the ISAR image by using a subset of the angular data range (see Example 2 below).
In this example the view direction and cross-range resolution of the ISAR image is changed by using a subset of the angular data range. Some of the script's post-processing options are demonstrated.
The images below show some results obtained by using different post-processing options available in the script.
A Lua implementation of the transient Pennes bioheat equation using finite differences and explicit time stepping for calculating thermal results in POSTFEKO.
An application macro to tile any POSTFEKO views side-by-side.
This application macro uses the S-parameter data from a Feko simulation to display a coupling matrix for a multi-port scenario.
The characteristic mode synthesis and design application macro is a post-processing application macro that can be used to calculate a weighted sum for the currents, near fields, and far fields requests for specific characteristic modes of interest. The application macro uses a modified version of the modal weighting coefficient (MWC) to use the radiating phase when synthesising the results with the macro.
A collection of smaller POSTFEKO application macro are available, but these macros do not include step-by-step instructions.
A collection of Lua macros are available to automate repetitive tasks where the workflow span both CADFEKO and POSTFEKO.
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.
Reference information is provided in the appendix.
A large collection of application macros are available for CADFEKO and POSTFEKO.
A collection of Lua application macros are available to automate repetitive tasks in POSTFEKO.
This application macro computes and displays an inverse synthetic aperture radar (ISAR) image from backscattered radar cross-section (RCS) data.
In this example the view direction and cross-range resolution of the ISAR image is changed by using a subset of the angular data range. Some of the script's post-processing options are demonstrated.
In this example the view direction and cross-range resolution of the ISAR image is changed by using a subset of the angular data range. Some of the script's post-processing options are demonstrated.
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