FEKO Examples Guide Altair University

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Examples Guide,December 2015,Altair HyperWorks Version 14 0. A Platform for Innovation,Altair Engineering Support Contact Information. http www altairhyperworks com, Web site http www altairhyperworks com ClientCenterHWSupportProduct aspx. http www altairhyperworks com feko,Altair HyperWorks 14 0. A Platform for Innovation, Copyright c 1986 2015 Altair Engineering Inc All Rights Reserved.
HyperMesh 1990 2015 HyperCrash 2001 2015 OptiStruct 1996 2015 RADIOSS 1986. 2015 HyperView 1999 2015 HyperView Player 2001 2015 HyperStudy 1999 2015. HyperGraph 1995 2015 MotionView 1993 2015 MotionSolve 2002 2015 HyperForm. 1998 2015 HyperXtrude 1999 2015 Process Manager 2003 2015 Templex 1990 2015. TextView 1996 2015 MediaView 1999 2015 TableView 2013 2015 BatchMesher 2003. 2015 HyperMath 2007 2015 HyperWeld 2009 2015 HyperMold 2009 2015 Manufac. turing Solutions 2005 2015 solidThinking 1993 2015 solidThinking Inspire 2009 2015. solidThinking Evolve 1993 2015 Durability Director 2009 2015 Suspension Director 2009. 2015 AcuSolve 1997 2015 AcuConsole 2006 2015 SimLab 2004 2015 Virtual Wind. Tunnel 2012 2015 FEKO c 1999 2014 Altair Development S A Pty Ltd. c 2014 2015 Al, tair Engineering Inc MDS 2011 2015 and VisSim 1989 2015. Other Altair software applications include, Altair PBS Works Compute Manager 2007 2015 Display Manager 2007 2015 PBS 1994. 2015 PBS Professional 1994 2015 PBS Application Services 2008 2015 PBS Analytics. 2007 2015 and PBS Desktop 2007 2012 PBS Portal 2007 2011 e BioChem 2007 2013. e Compute 2000 2007 e Render 2006 2010 OpenPBS 1994 2003 Personal PBS 2007. Altair Simulation Cloud Suite Simulation Manager 2003 2015 Compute Manager 2003. 2015 Display Manager 2003 2015 and Process Manager 2003 2015. Altair Packaged Solution Offerings PSOs Copyright c 2008 2015. Automated Reporting Director 2008 2015 Impact Simulation Director 2010 2015. Model Mesher Director 2010 2015 Model Verification Director 2013 2015 Squeak and Rat. tle Director 2012 2015 Virtual Gauge Director 2012 2015 Weld Certification Director 2014. Altair intellectual property rights are protected under U S and international laws and treaties. Additionally Altair software is protected under patent 6 859 792 and other patents pending. All other marks are the property of their respective owners. ALTAIR ENGINEERING INC Proprietary and Confidential Contains Trade Secret Informa. Not for use or disclosure outside of Altair and its licensed clients Information contained in Altair. software shall not be decompiled disassembled unlocked reverse translated reverse engi. neered or publicly displayed or publicly performed in any manner Usage of the software is only. as explicitly permitted in the end user software license agreement Copyright notice does not. imply publication,Third party software licenses, AcuConsole contains material licensed from Intelligent Light www ilight com and used by per. Software Security Measures, Altair Engineering Inc and its subsidiaries and affiliates reserve the right to embed software. security mechanisms in the Software for the purpose of detecting the installation and or use. of illegal copies of the Software The Software may collect and transmit non proprietary data. about those illegal copies Data collected will not include any customer data created by or used. in connection with the Software and will not be provided to any third party except as may. be required by law or legal process or to enforce our rights with respect to the use of any illegal. copies of the Software By using the Software each user consents to such detection and collection. of data as well as its transmission and use if an illegal copy of the Software is detected No steps. may be taken to avoid or detect the purpose of any such security mechanisms. December 2015 FEKO Examples Guide,CONTENTS i,Introduction 1.
A Antenna synthesis analysis,A 1 Dipole example A 1 1. A 2 Dipole in front of a cube A 2 1,A 3 Dipole in front of a plate A 3 1. A 4 Monopole antenna on a finite ground plane A 4 1. A 5 Yagi Uda antenna above a real ground A 5 1, A 6 Pattern optimisation of a Yagi Uda antenna A 6 1. A 7 Log periodic antenna A 7 1,A 8 Microstrip patch antenna A 8 1. 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 1 1. B 2 Antenna coupling using an ideal receiving antenna B 2 1. B 3 Using a point source and ideal receiving antenna B 3 1. C Radar cross section RCS,C 1 RCS of a thin dielectric sheet C 1 1. C 2 RCS and near field of a dielectric sphere C 2 1. C 3 Scattering width of an infinite cylinder C 3 1. C 4 Periodic boundary conditions for FSS characterisation C 4 1. D EMC analysis cable coupling, D 1 Shielding factor of a sphere with finite conductivity D 1 1. December 2015 FEKO Examples Guide,CONTENTS ii, D 2 Calculating field coupling into a shielded cable D 2 1.
D 3 A magnetic field probe D 3 1, D 4 Antenna radiation hazard RADHAZ safety zones D 4 1. E Waveguide microwave circuits,E 1 Microstrip filter E 1 1. E 2 S parameter coupling in a stepped waveguide section E 2 1. E 3 Using a non radiating network to match a dipole antenna E 3 1. E 4 Subdividing a model using non radiating networks E 4 1. E 5 Microstrip coupler E 5 1,F Bio electromagnetics. F 1 Exposure of muscle tissue using MoM FEM hybrid F 1 1. F 2 Magnetic Resonance Imaging MRI birdcage head coil example 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 1 1. I 2 POSTFEKO application automation I 2 1, I 3 Matching circuits generation with Optenni Lab I 3 1. I 4 Using HyperStudy with FEKO to optimise a bandpass filter I 4 1. December 2015 FEKO Examples Guide,INTRODUCTION 1,Introduction. 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. 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. www feko info,December 2015 FEKO Examples Guide,Antenna synthesis analysis. DIPOLE EXAMPLE A 1 1,A 1 Dipole example, Keywords dipole radiation pattern far field input impedance.
This example demonstrates the calculation of the radiation pattern and input impedance for a. simple half wavelength dipole shown in Figure A 1 1 The wavelength is 4 m 75 MHz. the length of the antenna is 2 m and the wire radius is 2 mm. Figure A 1 1 A 3D view of the dipole model with a voltage source symmetry and the far field pattern to. be calculated in CADFEKO are shown,A 1 1 Dipole,Creating the model. The steps for setting up the model are as follows,Define the following variables. lambda 4 Free space wavelength,freq c0 lambda Operating frequency. h lambda 2 Length of the dipole,radius 2E 3 Radius of the wire. Create a line primitive with the start and end coordinates of 0 0 h 2 and 0 0 h 2. Define a wire vertex port at the centre of the line. Add a voltage source to the wire port,Set the frequency to the defined variable freq.
December 2015 FEKO Examples Guide,DIPOLE EXAMPLE A 1 2. Requesting calculations, This problem is symmetric around the Z 0 plane All electric fields will be normal to this plane. and therefore the symmetry is electrical,The solution requests are. Create a vertical far field request 180 180 with 0 where and denotes the. angles theta and phi Sample the far field at 2 steps. Meshing information, Use the standard auto mesh setting with wire segment radius equal to radius. CEM validate, After the model has been meshed run CEM validate Take note of any warnings and errors.
Correct any errors before running the FEKO solution kernel. A 1 2 Results, A polar plot of the gain in dB of the requested far field pattern is shown in Figure A 1 2 Click. Axis settings Axes group to set the maximum dynamic range of the radial axis to 10 dB. Figure A 1 2 A polar plot of the requested far field gain dB viewed in POSTFEKO. Since the impedance is only calculated at a single frequency it can easily be read from the out. file The out file can be viewed in POSTFEKO s Out file viewer or in any other text file viewer. An extract is shown below,December 2015 FEKO Examples Guide. DIPOLE EXAMPLE A 1 3,DATA OF THE VOLTAGE SOURCE NO 1. real part imag part magnitude phase, Current in A 1 1241E 02 4 6364E 03 1 2160E 02 22 41. Admitt in A V 1 1241E 02 4 6364E 03 1 2160E 02 22 41. Impedance in Ohm 7 6025E 01 3 1356E 01 8 2237E 01 22 41. Inductance in H 6 6585E 08, Alternatively the impedance can be plotted as a function of frequency on a Cartesian graph or.
Smith chart in POSTFEKO,December 2015 FEKO Examples Guide. DIPOLE IN FRONT OF A CUBE A 2 1,A 2 Dipole in front of a cube. Keywords dipole PEC metal lossy dielectric, A half wavelength dipole is placed three quarters of a wavelength away from a cube The radi. ation pattern is calculated and the effect of the nearby cube on the radiation pattern is demon. strated Three different cubes are modelled in this example The first cube is PEC perfect. electrically conducting the second is a metal cube that has a finite conductivity and the third. cube is made as a solid dielectric material, The second and third models are an extension of the first model The examples should be set up. sequentially, Figure A 2 1 A 3D view of the dipole with a metallic cube model symmetry planes shown.
A 2 1 Dipole and PEC cube,Creating the model,The steps for setting up the model are as follows. Define the following variables,lambda 4 Free space wavelength. freq c0 lambda Operating frequency,h lambda 2 Length of the dipole. radius 2e 3 Wire radius of dipole, Create a cube The cuboid is created with the Base corner width depth height definition. method The base corner is at 0 lambda 4 lambda 4 and with the width depth and. height set equal to lambda 2 By default the cube will be PEC. Create a line between the points 0 0 h 2 and 0 0 h 2 Place the wire 3 4 lambda. away from the cube by translating it by 3 4 lambda in the negative X direction. 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

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