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FEKO实例教程.pdf
Title page
Contents
Introduction
1 Dipole example
1.1 Dipole
1.2 Results
2 Dipole in front of a cube
2.1 Dipole and PEC cube
2.2 Dipole and lossy metal cube
2.3 Dipole and dielectric cube
2.4 Comparison of the results
3 RCS of a thin dielectric sheet
3.1 Dielectric sheet
3.2 Results
4 RCS and near field of a dielectric sphere
4.1 Dielectric sphere
4.2 Results
5 Shielding factor of a sphere with finite conductivity
5.1 Finite conductivity sphere
5.2 Results
6 Exposure of muscle tissue using MoM/FEM hybrid
6.1 Dipole and muscle tissue
6.2 Results
7 A monopole antenna on a finite ground plane
7.1 Monopole on a finite ground
7.2 Results
8 Yagi-Uda antenna above a real ground
8.1 Antenna and ground plane
8.2 Results
9 Pattern optimisation of a Yagi-Uda antenna
9.1 The antenna
9.2 Results
10 Microstrip patch antenna
10.1 Pin-fed, SEP model
10.2 Pin-fed, multilayer Green's function
10.3 Edge-fed, multilayer Green's function
10.4 Comparison of the results for the different models
11 Proximity coupled patch antenna with microstrip feed
11.1 Circular patch
11.2 Results
12 Dielectric resonator antenna on finite ground
12.1 DRA with a modal port
12.2 Results
13 A Forked Dipole antenna
13.1 Forked dipole model
13.2 Results
14 Different ways to feed a horn antenna
14.1 Wire feed
14.2 Waveguide feed
14.3 Aperture feed
14.4 Comparison of the results for the different models
15 A Microstrip filter
15.1 Microstrip filter on a finite substrate (FEM/MoM)
15.2 Microstrip filter on a finite substrate (SEP)
15.3 Microstrip filter on an infinite substrate
15.4 Results
16 Dipole in front of a UTD/GO/PO plate
16.1 Dipole in front of a large plate
16.2 Dipole and a UTD plate
16.3 Dipole and a GO plate
16.4 Dipole and a PO plate
16.5 Comparative results
17 A lens antenna with Geometrical optics (GO) - ray launching
17.1 Creating the lens model
17.2 Results
18 Calculating field coupling into a shielded cable
18.1 Dipole and ground
18.2 Results
19 A magnetic-field probe
19.1 Magnetic-field probe
19.2 Results
20 S-parameter coupling in a stepped waveguide section
20.1 Waveguide step model (MoM)
20.2 Waveguide step model (FEM)
20.3 Results
21 Using the MLFMM for electrically large models
21.1 Large trihedral
21.2 Results
22 Antenna coupling on an electrically large object
22.1 Helicopter
22.2 Results
23 Antenna coupling calculation using ideal receiving antenna
23.1 The helix antenna in free space
23.2 Using the helix antenna far-field pattern
23.3 The full model
23.4 Results
24 Using a point source and ideal receiving antenna
24.1 The horn antenna in free space
24.2 Using the computed horn radiation pattern in a coupling calculation
24.3 The reference model
24.4 Results
25 Horn feeding a large reflector
25.1 MoM horn and PO reflector
25.2 Aperture excitation and PO reflector
25.3 Spherical excitation and PO reflector
25.4 Comparative results
26 Using a non-radiating network to match a dipole antenna
26.1 Dipole
26.2 Results
27 Subdividing a model using non radiating networks
27.1 Feed network
27.2 Patch with non-radiating feed network
27.3 Patch with radiating feed network
27.4 Results
28 Log periodic antenna
28.1 Log periodic dipole array
28.2 Results
29 Periodic boundary conditions for FSS characterisation
29.1 Frequency selective surface
29.2 Results
30 Periodic boundary conditions for array analysis
30.1 Pin fed patch
30.2 Results
31 Scattering width of an infinite cylinder
31.1 Infinite cylinder
31.2 Results
32 Windscreen antenna on an automobile
32.1 Rear section of automobile
32.2 Results
33 A TIMEFEKO example
Index
FEKO
Examples Guide
Suite 5.5
July 2009
Copyright 1998 – 2009: EM Software & Systems-S.A. (Pty) Ltd
32 Techno Avenue, Technopark, Stellenbosch, 7600, South Africa
Tel: +27-21-880-1880, Fax: +27-21-880-1936
E-Mail: feko@emss.co.za
WWW: http://www.feko.info
CONTENTS
Contents
Introduction
1 Dipole example
1.1 Dipole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Dipole in front of a cube
2.1 Dipole and PEC cube . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Dipole and lossy metal cube . . . . . . . . . . . . . . . . . . . . . . .
2.3 Dipole and dielectric cube . . . . . . . . . . . . . . . . . . . . . . . .
2.4
. . . . . . . . . . . . . . . . . . . . . . . .
Comparison of the results
3 RCS of a thin dielectric sheet
3.1 Dielectric sheet
3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 RCS and near field of a dielectric sphere
4.1 Dielectric sphere . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Shielding factor of a sphere with finite conductivity
5.1
5.2
Finite conductivity sphere . . . . . . . . . . . . . . . . . . . . . . . .
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Exposure of muscle tissue using MoM/FEM hybrid
6.1 Dipole and muscle tissue . . . . . . . . . . . . . . . . . . . . . . . . .
6.2
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 A monopole antenna on a finite ground plane
7.1 Monopole on a finite ground . . . . . . . . . . . . . . . . . . . . . . .
7.2
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Yagi-Uda antenna above a real ground
8.1
8.2
Antenna and ground plane . . . . . . . . . . . . . . . . . . . . . . . .
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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FEKO Examples Guide
CONTENTS
9 Pattern optimisation of a Yagi-Uda antenna
9.1
9.2
The antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Microstrip patch antenna
10.1 Pin-fed, SEP model . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.2 Pin-fed, multilayer Green’s function . . . . . . . . . . . . . . . . . . .
10.3 Edge-fed, multilayer Green’s function . . . . . . . . . . . . . . . . . .
10.4 Comparison of the results for the different models . . . . . . . . . . .
11 Proximity coupled patch antenna with microstrip feed
11.1 Circular patch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Dielectric resonator antenna on finite ground
12.1 DRA with a modal port
. . . . . . . . . . . . . . . . . . . . . . . . .
12.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13 A Forked Dipole antenna
13.1 Forked dipole model . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Different ways to feed a horn antenna
14.1 Wire feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14.2 Waveguide feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14.3 Aperture feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14.4 Comparison of the results for the different models . . . . . . . . . . .
15 A Microstrip filter
. . . . . . . . . .
15.1 Microstrip filter on a finite substrate (FEM/MoM)
15.2 Microstrip filter on a finite substrate (SEP)
. . . . . . . . . . . . . .
15.3 Microstrip filter on an infinite substrate . . . . . . . . . . . . . . . . .
15.4 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16 Dipole in front of a UTD/GO/PO plate
16.1 Dipole in front of a large plate . . . . . . . . . . . . . . . . . . . . . .
16.2 Dipole and a UTD plate . . . . . . . . . . . . . . . . . . . . . . . . .
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FEKO Examples Guide
CONTENTS
16.3 Dipole and a GO plate . . . . . . . . . . . . . . . . . . . . . . . . . .
16.4 Dipole and a PO plate . . . . . . . . . . . . . . . . . . . . . . . . . .
16.5 Comparative results . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 A lens antenna with Geometrical optics (GO) - ray launching
17.1 Creating the lens model
. . . . . . . . . . . . . . . . . . . . . . . . .
17.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18 Calculating field coupling into a shielded cable
18.1 Dipole and ground . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 A magnetic-field probe
19.1 Magnetic-field probe
. . . . . . . . . . . . . . . . . . . . . . . . . . .
19.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 S-parameter coupling in a stepped waveguide section
20.1 Waveguide step model (MoM) . . . . . . . . . . . . . . . . . . . . . .
20.2 Waveguide step model (FEM) . . . . . . . . . . . . . . . . . . . . . .
20.3 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21 Using the MLFMM for electrically large models
21.1 Large trihedral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 Antenna coupling on an electrically large object
22.1 Helicopter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23 Antenna coupling calculation using ideal receiving antenna
23.1 The helix antenna in free space
. . . . . . . . . . . . . . . . . . . . .
23.2 Using the helix antenna far-field pattern . . . . . . . . . . . . . . . .
23.3 The full model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23.4 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24 Using a point source and ideal receiving antenna
24.1 The horn antenna in free space
. . . . . . . . . . . . . . . . . . . . .
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FEKO Examples Guide
CONTENTS
24.2 Using the computed horn radiation pattern in a coupling calculation
24.3 The reference model . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24.4 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25 Horn feeding a large reflector
25.1 MoM horn and PO reflector . . . . . . . . . . . . . . . . . . . . . . .
25.2 Aperture excitation and PO reflector . . . . . . . . . . . . . . . . . .
25.3 Spherical excitation and PO reflector . . . . . . . . . . . . . . . . . .
25.4 Comparative results . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26 Using a non-radiating network to match a dipole antenna
26.1 Dipole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27 Subdividing a model using non radiating networks
27.1 Feed network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27.2 Patch with non-radiating feed network . . . . . . . . . . . . . . . . .
27.3 Patch with radiating feed network . . . . . . . . . . . . . . . . . . . .
27.4 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28 Log periodic antenna
28.1 Log periodic dipole array . . . . . . . . . . . . . . . . . . . . . . . . .
28.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29 Periodic boundary conditions for FSS characterisation
29.1 Frequency selective surface . . . . . . . . . . . . . . . . . . . . . . . .
29.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30 Periodic boundary conditions for array analysis
30.1 Pin fed patch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31 Scattering width of an infinite cylinder
31.1
Infinite cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32 Windscreen antenna on an automobile
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CONTENTS
32.1 Rear section of automobile . . . . . . . . . . . . . . . . . . . . . . . .
32.2 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33 A TIMEFEKO example
Index
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July 2009
FEKO Examples Guide
INTRODUCTION
Introduction
0-1
This Examples guide presents a set of simple examples which demonstrate a selection
of the features of the FEKO Suite. The examples have been selected to illustrate the
features without being unnecessarily 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 geometry creation and the solution set up and only 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 set up.
In this document the focus is on the recommended approaches (primarily using the CAD-
FEKO 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 specifically required. It is advisable to work through the Getting started
guide and familiarise yourself with the Working with EDITFEKO section in the FEKO
Users’ Manual before attempting the scripting only examples.
Running FEKO LITE
FEKO LITE is a lite version of the FEKO Suite, which is limited with respect to problem
size and therefore cannot run all of the examples in this guide. For more information on
FEKO LITE, please see the Getting started manual and the Installation Guide.
What to expect
The examples have been chosen to demonstrate how FEKO can be used in a selection of
applications 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 discover and understand the concepts
July 2009
FEKO Examples Guide
INTRODUCTION
0-2
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, the model creation is dis-
cussed (further information may be found in the notes editor window of the model files
themselves) and some results are presented.
More examples
This set of examples demonstrate some of the capabilities and usage 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.
Contact information
You can find the distributor for your region at
http://www.feko.info/contact.htm
Alternatively, for technical questions, please send an email to
for North America
for Europe
for all other regions
feko support@emssusa.com
feko support@emss.de
feko support@emss.co.za
or, for activation codes and licence queries, to
feko license@emssusa.com
feko license@emss.de
feko license@emss.co.za
for North America
for Europe
for all other regions
1www.feko.info
July 2009
FEKO Examples Guide
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