FEKO实例教程

【实例简介】
FEKO课程实例，有助于FEKO快速上手
CONTENTS 9 Pattern optimisation of a Yagi-Uda antenna 9.1 The antenna 9.2 Results 10 Microstrip patch antenna 10-1 10.1 Pin-fed SEP model 10-1 10.2 Pin-fed, multilayer Green's function 10.3 Edge-fed, multilayer Green' s function 10-4 10.4 Comparison of the results for the different models 10-5 11 Proximity coupled patch antenna with microstrip feed 11-1 11.1 Circular patch 11-1 11.2 Results 11-3 12 Dielectric resonator antenna on finite ground 12-1 12.1 DRA with a modal port 12-1 12.2 Results 12-4 13 A Forked Dipole antenna 13-1 13.1 Forked dipole model 13-1 13.2 Results 14 Different ways to feed a horn antenna 14-1 14.1 Wire feed 14-2 14.2 Waveguide feed 14-4 14.3 Aperture feed 14-4 14.4 Comparison of the results for the different models 14-5 15 A Microstrip filter 15-1 15.1 Microstrip filter on a finite substrate(FEM/ MoM) 15-1 15. 2 Microstrip filter on a finite substrate(SEP) 15-4 15.3 Microstrip filter on an infinite substrate 15-6 15.4 Results 15-7 16 Dipole in front of a UTD/Go/PO plate 16-1 16.1 Dipole in front of a large plate 16-1 16.2 Dipole and a utd plate 16-3 July 2009 FEKO Examples guide CONTENTS 16.3 Dipole and a go plate 16-3 16.4 Dipole and a Po plate 16.5 Comparative results 16-5 7 A lens antenna with Geometrical optics(GO)-ray launching 17-1 17.1 Creating the lens mode 17-1 17.2 Results 17-4 18 Calculating field coupling into a shielded cable 18-1 18.1 Dipole and ground 18-1 18.2 Results 18-3 19 A magnetic-field probe 19-1 19.1 Magnetic-field probe 19-1 19.2 Results 19-2 20 S-parameter coupling in a stepped waveguide section 20-1 20.1 Waveguide step model (mom) 20-1 20.2 Waveguide step model(FEM) 20-3 20.3 Results 20-4 21 USing the MlFMM for electrically large models 21-1 21.1 Large trihedral 21-1 21.2 Results 21-3 22 Antenna coupling on an electrically large object 22-1 22.1 Helicopter 22-1 22.2 Results 22-2 23 Antenna coupling calculation using ideal receiving antenna 23-1 23.1 The helix antenna in free space 23-2 23.2 Using the helix antenna far-field pattern 23-3 23. 3 The full mode 23-5 23.4 Results 23-5 24 USing a point source and ideal receiving antenna 24-1 24.1 The horn antenna in free space 24-1 July 2009 FEKO Examples guide CONTENTS 24.2 USing the computed horn radiation pattern in a coupling calculation 24-2 24.3 The reference model 24-2 24.4 Results 24-2 25 Horn feeding a large reflector 25-1 25.1 MoM horn and po reflector 25-2 25.2 Aperture excitation and PO reflector 25-4 25. 3 Spherical excitation and PO reflector 25-5 25.4 Comparative results 25-6 26 Using a non-radiating network to match a dipole antenna 26-1 26.1 Dipole 26-2 26.2 Results 26-3 27 Subdividing a model using non radiating networks 27-1 27.1 Feed network 27-1 27.2 Patch with non-radiating feed network 27-3 27. 3 Patch with radiating feed network 27-4 27.4 Results 27-5 28 Log periodic antenna 28-1 28.1 Log periodic dipole array 28-1 28.2 Results 29 Periodic boundary conditions for FSS characterisation 29-1 29.1 Frequency selective surface 29-2 29.2 Results 29-3 30 Periodic boundary conditions for array analysis 30-1 30.1 Pin fed patch 30-1 30.2 Results 30-3 31 Scattering width of an infinite cylinder 31-1 31.1 Infinite cylinder 31-1 31.2 Results 31-2 32 Windscreen antenna on an automobile 32-1 July 2009 FEKO Examples guide CONTENTS 32.1 Rear section of automobile 32-1 32.2 Results 32-3 33A TIMEFEKO example 33-1 Index July 2009 FEKO Examples guide Ⅰ NTRODUCTION Introduction This E samples 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 inder the FEKO installation. No results ate xampes/ExampleGuide models directory 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 E samples 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 Ecamples 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 Ⅰ NTRODUCTION 0- 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 website for more examples and models, specific documentation and other FEKO usage FAQs and ti 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 feko-supportqemssusa.com for north america. feko_@emss. de f Eu or上 urope feko _support@emss co za for all other regions or, for activation codes and licence queries to feko license@emssusa com for north america. feko license@emss. de for Europe feko license@emss co za for all other regions Iwww.feko.info July 2009 FEKO Examples guide DⅠ POLE EXAMPLE 1-1 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 Figurel-1. The wavelength, A, is 4m (approximately 75 MHz), the length of the antenna is 2 m and the wire radius is 2 mm Port1 Voltagesource 1 Figure 1-1: A 3D view of the dipole model with a voltage source excitation, symmetry and the far field pattern to be calculated in CADFEKO are shown 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 co/lambda(Operating frequency. h=lambda/2(Length of the dipole) Create a line primitive with the beginning and end coordinates of(0,0,h /2) and (0,0,h/2) Define a wire port at the centre of the line July 2009 FEKO Examples guide DⅠ POLE EXAMPLE 1-2 e Add a voltage source to the wire port Set the frequency to the defined variable freq Requesting calculations This problem is symmetrical 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°≤6≤180°, with=0° where o and 0 denotes the angles theta and phi. Meshing information Triangle edge length: Not applicable Wire segment length: lambda/20 Tetrahedral edge length: Not applicable Wire segment radius: 2e-3 EM validate After the model has been meshed, run EM validate. Take note of any warnings and errors Correct any error before running the FEKo solution kernel 1.2 Results A polar plot of the gain(in dB) of the requested far field pattern is shown in Figure 1-2 Unselect the Autoscale in the Amplitude settings and set the minimum value to -10 dB and the maximum value to 3 dB July 2009 FEKO Examples guide 【实例截图】
【核心代码】