FEKO2017入门教程：电磁仿真软件指南

FEKO2017

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"FEKO2017的入门指导 Get Started for FEKO2017" 本文档是针对FEKO2017的入门指南，旨在帮助初次接触或升级到此最新版本的用户快速上手。FEKO是一款强大的电磁场仿真软件，广泛应用于天线设计、射频通信、雷达散射截面(RCS)分析等领域。本指南由Altair Engineering公司发布，作为其HyperWorks平台的一部分，旨在提供创新解决方案。在2017年的版本中，FEKO提供了诸多新特性和改进，以提升计算效率和准确性。Altair HyperWorks平台不仅仅包含FEKO，还包括如HyperMesh、OptiStruct、RADIOSS等其他多物理场求解器，以及HyperView、HyperMath等一系列前后处理工具，它们共同构建了一个全面的工程模拟环境。在开始使用FEKO2017之前，读者需要了解一些基本概念，例如电磁场的基础理论、有限元法(FEM)和矩量法(MOM)等仿真方法。入门指南会逐步介绍如何创建和导入几何模型，设置材料属性，定义边界条件，以及选择合适的求解策略。此外，还会讲解如何进行网格划分，这是确保仿真精度的关键步骤。在软件操作方面，用户界面(UI)的导航和命令使用是学习的重点。FEKO的UI设计直观，但包含众多功能，初学者需要时间熟悉。教程中将展示如何通过菜单、工具栏和快捷键来执行常见任务，例如导入CAD模型、定义天线参数、运行求解器以及后处理结果查看。 FEKO2017的入门指导还可能涉及以下几个关键知识点： 1. **几何建模**：包括导入CAD数据，进行几何清理和简化，以及创建复杂的几何结构，如微波组件和天线阵列。 2. **材料库**：理解并应用各种电磁材料的属性，如介电常数、磁导率和损耗角正切。 3. **电磁模型**：选择合适的物理模型，如传输线模型、辐射近场模型和全波分析。 4. **网格生成**：学习如何生成高质量的网格，包括体网格、表面网格和边网格，以及网格细化和优化技巧。 5. **求解器设置**：配置求解器参数，如迭代次数、频率范围和收敛准则。 6. **结果后处理**：掌握如何解释和可视化仿真结果，包括电场强度、功率密度和散射特性。 7. **报告和脚本**：学习如何生成专业报告，并利用内置脚本语言自动化工作流程。最后，Altair提供了丰富的在线资源，如官方网站http://www.altairhyperworks.com/feko，用户可以在这里找到更多的帮助文档、视频教程和技术支持。通过这个入门指南和在线资源，用户应能逐步掌握FEKO2017的使用，从而在电磁仿真领域提升工作效率和解决问题的能力。

RECTANGULAR HORN ANTENNA PROJECT 1-8

The Model branch is a visualisation of the geometry creation hierarchy. Parts are derived from

existing ones (for example, the individual parts used in a Boolean operation or the original part

before a split operation). The original (parent) parts are removed from the top level of the model

and listed as sub-branches under the new part in the model tree.

The term part is used for highest-level items. These can be at the root level under Model or in

the top level of an assembly. The model parts are visible in the 3D view.

Right-clicking any entry in the model tree will open an appropriate context menu. Double-

clicking an item in the model tree will display the Properties for that item.

When items are hidden, they are displayed with greyed icons in the model tree, but will not be

displayed in the 3D view. Hiding parts simpliﬁes working with complex models containing a large

number of parts.

When a geometry or mesh part is selected on the Construction tab

of the model tree, additional information is displayed in a window

positioned just below. This is known as the Details tree.

If the Union1 part is selected, the details tree contains a tree with

two branches, namely Faces and Edges. If the horn geometry con-

tained a closed volume, a Regions branch would also be visible and

if wires were present, a Wires branch would be visible. By selecting

wires, edges, faces or regions in this tree, local properties such as

mesh size, coatings and solution method can be set.

Conﬁguration tab

The Conﬁguration tab consists of the Global and Conﬁguration spe-

ciﬁc model settings and requests.

The following Global model settings may be deﬁned from its con-

text menus: solver settings, the global frequency, global sources,

global loads, global networks and the global power settings.

The following Conﬁguration speciﬁc settings may be deﬁned from

its context menus: requests, frequency per conﬁguration, sources

per conﬁguration, loads per conﬁguration and power per conﬁgu-

ration.

Setting the solution control

‘Ports’ are required to add sources and loads to the geometry. Ports deﬁne the positions on the

model where loads and sources can be attached. In this model, a waveguide port is added to the

end of the waveguide section feeding the horn. Ports can be added from the Ports group on the

Source/Load tab. A source can be added to the waveguide port by clicking the Waveguide source

icon (Sources on ports group).

The simulation frequency can also be set on the Source/Load tab under the Settings group.

Requests can be added from the Request tab. Both far ﬁeld and near ﬁeld requests can be made

from the Solution requests group.

January 2017 FEKO Getting Started

RECTANGULAR HORN ANTENNA PROJECT 1-11

7. 3D View/2D graphs The 3D view enables the user to visualise the geometry, mesh, solution

settings as well as 3D results. The 2D graphs enable the user to view 2D results on a

Cartesian, polar, Cartesian surface graph or Smith chart. The 2D and 3D views each have

their own context-sensitive ribbon tabs. The window tabs of the 2D and 3D views may be

re-ordered by simply dragging it to the desired location.

8. Result palette The result palette enables a user to apply custom visualisation settings to 3D

results or 2D traces by customising the graph contents.

9. Help The Help icon gives the user quick access to the FEKO manuals. Context sensitive help

is available in all FEKO Suite GUI components by pressing <F1> at any time.

10. Search bar The search bar enables the search for a speciﬁc action or keyword in CADFEKO.

Entering a keyword in the search bar will populate a dropdown list of actions as well as

the location of the particular action on the ribbon or context menu. Clicking any one of the

items in the list will execute the action.

1.8 Viewing and validation of the model

POSTFEKO provides visualisation tools and settings to check that the model was created as in-

tended. In this section a number of features in POSTFEKO are highilighted to help the user

explore. Users are encouraged to have a look at and experiment with other features that are

available while navigating the ribbon tabs.

The horn model should be open showing the model and symmetry planes in the 3D view. The

distance measurement tool can be used to validate the speciﬁcations (dimensions) of the horn.

Display settings

By default the mesh edges will not be shown. The option to display the

triangle mesh edges may be set by clicking the 3D View context, Mesh

tab (Visibility group) and selecting Edges from the Metal dropdown

menu.

The Symmetry display can be disabled by selecting the Display tab in the 3D View context

and clicking the Symmetry icon (Method display group). The toggle icon for symmetry

display is also available on the status bar.

Sources in the model are displayed by default. The display of the source may be disabled

by selecting the Display tab in the 3D View context and clicking the Sources icon (Entities

group).

Restore the default zoom by pressing <F5>. The Zoom to extents icon can be found on

the View tab.

January 2017 FEKO Getting Started

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