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FEKO2017举例教程.pdf
FEKO 2017
Title page
Copyright
Contents
Introduction
A Antenna synthesis + analysis
A-1 Dipole example
A-2 Dipole in front of a cube
A-3 Dipole in front of a plate
A-4 Monopole antenna on a finite ground plane
A-5 Yagi-Uda antenna above a real ground
A-6 Pattern optimisation of a Yagi-Uda antenna
A-7 Log periodic antenna
A-8 Microstrip patch antenna
A-9 Proximity coupled patch antenna with microstrip feed
A-10 Modelling an aperture coupled patch antenna
A-11 Different ways to feed a horn antenna
A-12 Dielectric resonator antenna on finite ground
A-13 A lens antenna with ray launching geometrical optics (RL-GO)
A-14 Windscreen antenna on an automobile
A-15 Design of a MIMO elliptical ring antenna (characteristic modes)
A-16 Periodic boundary conditions for array analysis
A-17 Finite array with non-linear element spacing
B Antenna placement
B-1 Antenna coupling on an electrically large object
B-2 Antenna coupling using an ideal receiving antenna
B-3 Using a point source and ideal receiving antenna
C Radar cross section (RCS)
C-1 RCS of a thin dielectric sheet
C-2 RCS and near field of a dielectric sphere
C-3 Scattering width of an infinite cylinder
C-4 Periodic boundary conditions for FSS characterisation
D EMC analysis + cable coupling
D-1 Shielding factor of a sphere with finite conductivity
D-2 Calculating field coupling into a shielded cable
D-3 A magnetic-field probe
D-4 Antenna radiation hazard (RADHAZ) safety zones
E Waveguide + microwave circuits
E-1 Microstrip filter
E-2 S-parameter coupling in a stepped waveguide section
E-3 Using a non-radiating network to match a dipole antenna
E-4 Subdividing a model using non-radiating networks
E-5 Microstrip coupler
F Bio electromagnetics
F-1 Exposure of muscle tissue using MoM/FEM hybrid
F-2 Magnetic Resonance Imaging (MRI) birdcage head coil example
G Time domain examples
G-1 Time analysis of the effect of an incident plane wave on an obstacle
H Special solution methods
H-1 Forked dipole antenna (continuous frequency range)
H-2 Using the MLFMM for electrically large models
H-3 Horn feeding a large reflector
H-4 Optimise waveguide pin feed location
I User interface tools
I-1 Introduction to application automation
I-2 POSTFEKO application automation
I-3 Matching circuits generation with Optenni Lab
I-4 Using HyperStudy with FEKO to optimise a bandpass filter
J Index
Index
Learn moreataltairhyperworks.comExamplesGuideforFEKOv2017
Examples Guide
2017 RELEASE
January 2017
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January 2017
FEKO Examples Guide
CONTENTS
i
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
A Antenna synthesis + analysis
A-1-1
A-1 Dipole example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-2-1
A-2 Dipole in front of a cube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-3-1
A-3 Dipole in front of a plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-4-1
A-4 Monopole antenna on a finite ground plane . . . . . . . . . . . . . . . . . . . . .
A-5-1
A-5 Yagi-Uda antenna above a real ground . . . . . . . . . . . . . . . . . . . . . . . . .
A-6-1
A-6 Pattern optimisation of a Yagi-Uda antenna . . . . . . . . . . . . . . . . . . . . . .
A-7-1
A-7 Log periodic antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-8-1
A-8 Microstrip patch antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-9 Proximity coupled patch antenna with microstrip feed . . . . . . . . . . . . . . .
A-9-1
A-10 Modelling an aperture coupled patch antenna . . . . . . . . . . . . . . . . . . . A-10-1
A-11 Different ways to feed a horn antenna . . . . . . . . . . . . . . . . . . . . . . . . A-11-1
A-12 Dielectric resonator antenna on finite ground . . . . . . . . . . . . . . . . . . . . A-12-1
A-13 A lens antenna with ray launching geometrical optics (RL-GO) . . . . . . . . . A-13-1
A-14 Windscreen antenna on an automobile . . . . . . . . . . . . . . . . . . . . . . . . A-14-1
A-15 Design of a MIMO elliptical ring antenna (characteristic modes) . . . . . . . . A-15-1
A-16 Periodic boundary conditions for array analysis
. . . . . . . . . . . . . . . . . . A-16-1
A-17 Finite array with non-linear element spacing . . . . . . . . . . . . . . . . . . . . A-17-1
B Antenna placement
B-1 Antenna coupling on an electrically large object . . . . . . . . . . . . . . . . . . .
B-2 Antenna coupling using an ideal receiving antenna . . . . . . . . . . . . . . . . .
B-3 Using a point source and ideal receiving antenna . . . . . . . . . . . . . . . . . .
B-1-1
B-2-1
B-3-1
C Radar cross section (RCS)
C-1 RCS of a thin dielectric sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-2 RCS and near field of a dielectric sphere . . . . . . . . . . . . . . . . . . . . . . .
C-3 Scattering width of an infinite cylinder
. . . . . . . . . . . . . . . . . . . . . . . .
C-4 Periodic boundary conditions for FSS characterisation . . . . . . . . . . . . . . .
C-1-1
C-2-1
C-3-1
C-4-1
D EMC analysis + cable coupling
D-1 Shielding factor of a sphere with finite conductivity . . . . . . . . . . . . . . . .
D-1-1
January 2017
FEKO Examples Guide
CONTENTS
D-2 Calculating field coupling into a shielded cable . . . . . . . . . . . . . . . . . . .
D-3 A magnetic-field probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-4 Antenna radiation hazard (RADHAZ) safety zones . . . . . . . . . . . . . . . . .
E Waveguide + microwave circuits
E-1 Microstrip filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E-2 S-parameter coupling in a stepped waveguide section . . . . . . . . . . . . . . .
E-3 Using a non-radiating network to match a dipole antenna . . . . . . . . . . . . .
E-4 Subdividing a model using non-radiating networks . . . . . . . . . . . . . . . . .
E-5 Microstrip coupler
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii
D-2-1
D-3-1
D-4-1
E-1-1
E-2-1
E-3-1
E-4-1
E-5-1
F Bio electromagnetics
F-1 Exposure of muscle tissue using MoM/FEM hybrid . . . . . . . . . . . . . . . . .
F-2 Magnetic Resonance Imaging (MRI) birdcage head coil example . . . . . . . . .
F-1-1
F-2-1
G Time domain examples
G-1 Time analysis of the effect of an incident plane wave on an obstacle . . . . . .
G-1-1
H Special solution methods
H-1 Forked dipole antenna (continuous frequency range)
. . . . . . . . . . . . . . . H-1-1
H-2 Using the MLFMM for electrically large models . . . . . . . . . . . . . . . . . . . H-2-1
H-3 Horn feeding a large reflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-3-1
H-4 Optimise waveguide pin feed location . . . . . . . . . . . . . . . . . . . . . . . . . H-4-1
I User interface tools
I-1 Introduction to application automation . . . . . . . . . . . . . . . . . . . . . . . . .
I-2 POSTFEKO application automation . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-3 Matching circuits generation with Optenni Lab . . . . . . . . . . . . . . . . . . . .
I-4 Using HyperStudy with FEKO to optimise a bandpass filter . . . . . . . . . . . . .
J
Index
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-1-1
I-2-1
I-3-1
I-4-1
I-1
January 2017
FEKO Examples Guide
INTRODUCTION
Introduction
1
This Examples guide presents a set of simple examples which demonstrate a selection of the fea-
tures of FEKO. The examples have been selected to illustrate the features without being unnec-
essarily complex or requiring excessive run times. The input files for the examples can be found
in the examples/ExampleGuide_models directory under the FEKO installation. No results are
provided for these examples and in most cases, the *.pre, *.cfm and/or *.opt files have to be
generated by opening and re-saving the provided project files (*.cfx) before the computation
of the results can be initiated by running the FEKO preprocessor, solver or optimiser.
FEKO can be used in one of three ways. The first and recommended way is to construct the entire
model in the CADFEKO user interface. The second way is to use CADFEKO for the model geom-
etry creation and the solution setup and to use scripting for advanced options and adjustment of
the model (for example the selection of advanced preconditioner options). The last way is to use
the scripting for the entire model geometry and solution setup.
In this document the focus is on the recommended approaches (primarily using the CADFEKO
user interface with no scripting).
Examples that employ only scripting are discussed in the Script Examples guide. These examples
illustrate similar applications and methods to the examples in the Examples guide and it is highly
recommended that you only consider the Script Examples if scripting-only examples are specifi-
cally required. It is advisable to work through the Getting Started Guide and familiarise yourself
with the Working with EDITFEKO section in the User Manual before attempting the scripting only
examples.
What to expect
The examples have been chosen to demonstrate how FEKO can be used in a selection of applica-
tions with a selection of the available methods.
Though information regarding the creation and setup of the example models for simulation is
discussed, these example descriptions are not intended to be complete step-by-step guides that
will allow exact recreation of the models for simulation. This document rather presents a guide
that will help the user to discover and understand the concepts involved in various applications
and methods that are available in FEKO, while working with the provided models.
In each example, a short description of the problem is given, then the model creation is discussed
after which the relevant results are presented.
More examples
This set of examples demonstrates the major features of FEKO. For more step-by-step examples,
please consult the Getting started guide. Also consult the FEKO website1 for more examples and
models, specific documentation and other FEKO usage FAQ’s and tips.
1www.feko.info
January 2017
FEKO Examples Guide
Chapter A
Antenna synthesis + analysis
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