Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses
involving 3D objects of arbitrary shapes.
3D views are used to display and interact with the model. You can zoom, rotate and pan around a 3D model using the keyboard,
mouse or a combination of both. You can use a 3D mouse, specify a view or select specific parts of a model. Multiple 3D
views are supported.
Define field or current data using either far field data, near field data, spherical mode data or PCB current data. Use
the field/current definition when defining an equivalent source or a receiving antenna.
Define a medium with specific material properties, import a predefined medium from the media library or add a medium from
your model to the media library.
Defined media can be applied to the model in various ways. Some media settings are applied to regions, others on faces
and wires. The rules for defining media varies between the different solution methods.
Use a periodic boundary condition (PBC) to analyse infinite periodic structures. A typical application of PBC is to
analyse frequency selective surface (FSS) structures.
Create an arbitrary finite antenna array that consists of an array of contributing elements, either with direct feeds for
each element or via indirect coupling, and solve with the efficient domain Green's function method (DGFM).
Use the windscreen tools to define a curved reference surface constrained by a cloud of points, normals and optional U′V′ parameters. The constrained surface is then used as a reference to create a work surface where windscreen layers and curved
parameterised windscreen antenna elements can be created.
Many electromagnetic compatibility and interference problems involve cables that either radiate, are irradiated or cause
coupling into other cables, devices or antennas. Use the cable modelling tool and solver to analyse the coupling and radiation.
For a frequency domain result, the electromagnetic fields and currents are calculated at a single frequency or frequency
range. When the finite difference time domain (FDTD) solver is used, the frequency must be specified to convert the native time domain results to the frequency domain.
The excitation of an antenna is normally specified as a complex voltage, but it may be useful to specify the total radiated
or source power instead. The result is then scaled to yield the desired source power level.
A port is a mathematical representation of where energy can enter (source) or leave a model (sink). Use a port
to add sources and discrete loads to a model.
The network schematic view is a panel that shows all general networks, transmission lines and ports (wire and edge
ports) in the model. Use this view to connect general networks, transmission lines, ports and loads.
Define a general non-radiating network using network parameter matrices. In the network schematic view, interconnect
the networks (cascading) and excite or load the network ports.
Define a general non-radiating network by importing a direct component-based network from a SPICE .cir file. In the network schematic view, interconnect the networks (cascading) and excite or load the network
ports.
Define an ideal, non-radiating transmission line. In the network schematic view, connect the transmission line to
a port, other transmission lines or general networks.
Perform multiple solutions for a single model using multiple configurations. Multiple configurations remove the requirement
to create multiple models with different solution requests.
Use an infinite plane or half-space to model a ground plane efficiently. The number of triangles in the model is reduced
as the ground plane is not discretised into triangles.
A CADFEKO.cfm file can be imported into EDITFEKO to make use of more advanced features available in EDITFEKO and to directly edit the .pre file for more flexible solution configurations.
During the design process, the development of a model can introduce a range of issues that can lead to a non-simulation-ready
model. Use the validation toolset to verify that the model is simulation-ready or to search, detect and flag discrepancies.
The default solver used in Feko is the method of moments (MoM) - surface equivalence principle (SEP). A solver is specified per model, per face or per region, and depends on the solver in question.
CADFEKO has a collection of tools that allows you to quickly validate the model, for example, perform calculations using
a calculator, measure distances, measure angles and export images.
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.
Define a general non-radiating network by importing a direct component-based network from a SPICE .cir file. In the network schematic view, interconnect the networks (cascading) and excite or load the network
ports.
Define a general non-radiating network by importing a direct component-based network
from a SPICE .cir file. In the network
schematic view, interconnect the networks (cascading) and excite or load the network
ports.
Note:
Feko supports only a subset of Berkeley SPICE3f5
syntax.
Only linear circuits are supported.
On the Source/Load tab, in the
Loads/Networks group, click the Network icon.
From the Data typedrop-down list, select SPICE
network.
From the SPICE port referencedrop-down list, select one of the following:
To use a SPICE file with an absolute port reference, select
Absolute.
To use a SPICE file with a relative port reference, select
Relative.
In the Number of network terminals field, specify the
number of network terminals.
Note:
The number of network terminals must correspond to the number of
ports in the .cir
file for an absolute port reference.
The number of network terminals must be half the number of ports in
the .cir file for a
relative port reference.
In the Filename field, browse to the location of the
.cir file.
In the Circuit name field, specify the subcircuit
network name in the .cir
file.
Note:Circuit name must correspond
to the subcircuit name in the .cir file.
In the Label field, add a unique label for the general
network.
Click the Create button to create the general
network and to close the dialog.