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.
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 POSTFEKOapplication 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-processingapplication 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.
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.
A Lua implementation of the transient Pennes bioheat equation using finite differences and explicit time stepping for calculating
thermal results in POSTFEKO.
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.
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.
This application macro computes and displays an inverse synthetic
aperture radar (ISAR) image from backscattered radar cross-section (RCS) data.
Overview
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.
Preconditions
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 θ'=90∘ cut. Sub-ranges of the total angular phi range could be used to change the viewing angle.
Example 1: Three Spheres
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).
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.