EMPro Workshop - Module2 - EMPro Basics Version 2.0

Module 2: EMPro Basics

EMPro Workshop Version 2.0 1

Workspace Tool Bar

EMPro User Interface

Geometry, Grid, Component, Sensor Tools

Project Tree Toggle Buttons Geometry Tools

Project Tree:

Simulator Toggle Button

•Port/Feed •Sensors •Materials •Waveforms •Boundary •Grid/Mesh •Python Script

WorkSpace Window View Tools (Under View menu as well)

Basic Building Blocks


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Electro-Magnetic Simulation Flow in EMPro (1) Geometry Modeling

Port / Feed

Grid / Meshing

Start CAD Data

Internal Ports

FDTD Grid/Mesh

Port/Feed Setup

CAD File Import

FDTD FEM

Drawing in EMPro Geometry Data

FEM Mesh Setup

Material Editor

Waveguide Ports (only for FEM) EMPro Workshop Version 2.0

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Electro-Magnetic Simulation Flow in EMPro (2) Sensors

Simulation Setup

Post-Processing Done FDTD

FDTD

Result Window

FEM

FEM


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Project Properties Editor / Application Preferences Project Properties

Application Preferences

• Setup EMPro project specific properties such as display units

• Setup EMPro preferences


Viewing/Measure Tools

Zoom to Extents = View All

“3D View”

“2D View” Measure Tool Parts

Field Reader

Component Sensor Output

Visibility On/Off Transparency Setup

Mesh Viewing Control Bounding Box


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Instructor Demo for EMPro UI


1. Importing CAD Files


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Importing CAD Files in EMPro

CAD Data

CAD File Import

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EMPro allows to import various industry standard CAD formats

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A fast way to bring existing design geometries to EMPro simulation space

Supported CAD formats


ODB++ Import in EMPro

CAD Data

CAD File Import

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ODB++ is a printed circuit board manufacturing database

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EMPro can import ODB++ (from EMPro2010)

Imports odb++ directory


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Lab Example: QFN (Quad Flat No-Lead) Package PCB Vias from QFN to ground

Microstrip Line on ThinFilm Substrate Top View

Board Microstrip Feed

Bottom View

Double Bonding Wires Board


Importing CAD Files o

Let’s exercise the EMPro importing capability with QFN package example 

Step1: Set the display unit to “millimeters” in “Project Properties Editor”

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Step2: Select “File / Import / CAD Files…”

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Step3: Point to the directory where the SAT files located and select them all – “~/M2 – EMPro Basics/QFN_Sat_Files”

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Step4: Click “OK”

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Step5: Set the Interpret units as “millimeters” and turn “Heal” flag on

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Step6: Click “OK”


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Geometry Check After Import o

Imported objects are assembled to an assembly part with a name “Multi - file import” and don’t have material assigned to them. They should be renamed for a better readability of object names and assigned to certain materials Warning message:

Hover on the symbol to view the message

Grey Color: No material Assigned


Material Definitions and Assignments o

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Use EMPro “Materials/Select from Default Library” or “Materials/New Material Definition” menu to copy or define material definitions Select from the library if available but you can create your own if necessary Default Library

Select and click “Add” button to add


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Creating Your Own Definition Library o

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Users can customize their own library for materials, geometries, etc… for repeated use of them “Workspace Library Tool” allows users to add or access customized libraries


Using Custom Workspace Library o

Directory from EMPro Workshop Labs

Add “EMPro_Workshop_Library” from “Libraries” dialog

Add/Open/Remove Libraries

Library Filter

Drag and Drop to add material definition


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Required Material Definitions and Assignment for QFN Package Lab Exercise o

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Materials

Assignment: Just drag and drop the material to the designated part

Drag and Drop will assign and change the color of objects

In this exercise, the imported objects are renamed and reassembled shown to the right


2. Geometry Modeling and Manipulation in EMPro


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Coordinate Systems in EMPro Global coordinate (X, Y, and Z)

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X, Y, and Z based on the Global Triad

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Does not change and remains the same

Reference coordinate (U, V, and W)

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Global Triad

Refers to the orientation and location of objects within their native assembly 3D object

Local coordinate (U’, V’, and W ’)

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It is a working coordinate system and initially the same as the Reference Coordinate System.

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It is initiated when an editing session begins

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The orientation is the Orientation Triad . Orientation Triad


A bit Confusing? Let’s take an example of moving a cube If you want to reference to the global, then set the context to global

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If you want to reference to the reference coordinate, then set the context to reference

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W’

W Z

Translated Z Within an assembly

V’

V Y

X

Global Coordinate System

X

U

Y Reference Coordinate System

U’ Local or Working Coordinate System


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Example

Context of Local Coordinate System from Global Coordinate System View Origin of Local Coordinate System from Global Coordinate referenced


Setting up the Coordinate System o

Use specify orientation menu or tab from either the geometry modeling menu or object created


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EMPro Geometry Modeling and Manipulation o

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Users can also enter geometries by using EMPro drawing capabilities Users can also modify existing geometries which include imported objects, for example, move, copy, rotate, and Boolean operations Menus are: “Create, Modify, Boolean, Patterns”


Easy-of-Use Primitives Building Blocks o

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Some of common structures are configured as the primitives building blocks These blocks are placed at the center location (0,0,0) of drawing window

“Box”

“Pyramid” “Sphere”

“Cylinder”

“Torus”

“Helix”

“Cone”


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Standard Box Solid Modeling o

“Create../Extrude” command  Makes 3D object from 2D object 

Step1: Select “Create.../Extrude”

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Step2: Set the orientation of the drawing plane. The default is XY plane

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Step3: Draw 2D objects such as circle, rectangle, or polygons

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Step4: Extrude it to make a 3D object

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Step5: Name the object

“Step2”

“Step3” “Step4”

“Step5”


Lab Exercise: Create a 10x10x10 [mm] cube or box Lab_10x10x10_Cube.ep o

Let’s create a 10x10x10 [mm] box on XY-plane 

Step1: Select “Create.../Extrude”

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Step2: Name it “mybox”

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Step3: Select the rectangle from the shape tool

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Step4: Select (0,0) for the lower left corner of the box or use “Tab” to active the coordinate entry dialog

“Step2”


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Lab Exercise : Create a 10x10x10 [mm] cube or box Continue… 

Step5: Select (10,10) coordinate or use “Tab” button to bring the “Specify Position” dialog up

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While the mouse is moving over the drawing plane, the dX and dY (or U and V) value will be displayed

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When the dialog is used, enter 10 mm for the width and 10 mm for the height. Please remember that the space between the number and unit is required

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Step6: Click OK button


Lab Exercise : Create a 10x10x10 [mm] cube or box Continue… 

Step7: Select the “Extrude” tab

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There are two ways to make it a 3D object. One is to type the extrude distance and the other is to grab and move the arrow in the geometry space to change the distance.

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Step8: Enter 10 mm in the Extrude Distance.

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Step9: Click Done

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The green check mark means that there is no problem with this object creation. EMPro Workshop Version 2.0

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Simple, Isn’t It? o

Lab_10x10x10_Cube_With_3D_Library.ep

Then, let’s try another way which is using the primitives building blocks

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Step1: Select the “Box”

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Step2: Enter “Depth”, “Height”, and “Width”, all 10 mm

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Step3: Click “Insert” button

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Done! Now you have just created another 10x10x10 [mm] cube

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The difference of this 3D box is that the center of object is located at (0,0,0) whereas the other is user definable, which was located at (5,5,0). However the box can be easily moved to another location by translating it

“Box”


Advanced 3D Modeling Tools

“Extrude/ Advanced Option”

“Create/Revolve Revolve

Twist

Draft By Angle

Hole w/wo Draft

Draft By Law

Hole Special


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Making Waveguides Using Advanced Modeling Lab_WR229_Waveguides.ep Tools o

WR229 (3.3~4.9G) : a=2.29 [in] b=1.145 [in], thickness = 0.064 [in] length = 10 [in] 

Step1: Set the project display unit to “Inch”

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Step2: Use “Extrude” to draw two 2D rectangular boxes that represent the waveguide (Use Tab)

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Step3: Enter 10 in for the extrude distance and make sure “Hole Draft Type: Against Periphery”, then click “Done”


Advanced Topic: Parameters o

EMPro allows any arbitrary parameters for modeling and others 

Name : Name of the parameter, Ex) width, length, height

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Formula : Formula, Ex) sqrt(2)

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Value : Value from the formula Ex) 1.414… from the above example

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Description : Comments

“Add new parameters”

“Delete parameters”


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Lab Exercise: Using Parameters Lab_Parameterized_Solid_Modeling.ep o

Create a box with p_x, p_y, and p_z parameters that are all 10 mm 

Step1: Open the parameter window

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Step2: Define p_x, p_y, and p_z as shown below

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Step3: Create a box but type the parameter instead a constant value

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Step4: Done!


Instructor Demo for Geometry Modeling


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3. Modify Existing 2D/3D Objects


Resizing Existing 3D Objects o

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Lab_10x10x10_Cube.ep

EMPro remembers modeling operations applied to the object so that user can go back to the operation and change it any time Example: Resize the height to 20 mm 

Step1: Open Lab_10x10x10_Cube.ep project

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Step2: Expand the Parts menu and double click Extrude

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Step3: Go to the Extrude tab and change the Extrude Distance to 20 mm

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Step4: Click Done


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Editing Existing Extruded 2D Object Lab_Edit_Objects.ep o

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Double click of Extrude brings 2D drawing space back Click “Select/Manipulate” Button Hover the mouse over the edges or corners of rectangle, and click right mouse button to bring up the edit/delete menu User can delete the edges or select vertices to edit or lock the positions


Moving (Translate)/Rotating Objects Lab_Translate_Objects.ep o

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Use “Specify Orientation” menu or tab from either the geometry modeling menu or object created

Moving objects is Translating objects in EMPro Translation/Rotation work in the local coordinate system but it can be changed to other coordinate system in the Context menu “Move”


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Copying/Deleting 2D/3D Objects o

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Copying objects is easy in EMPro, same process as in Windows Select object and use “Edit/Copy” Then use “Edit/Paste” under the Parts menu Since the copy commend copies it onto the same position as the one being copied, you may need to translate it to other position Delete follows the same or simple user can use Delete key


Boolean Operations Lab_Boolean_Operations.ep o

Boolean operation in EMPro applies to two or multiple parts

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Invoke “Boolean…/Two Parts”

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Select blank object (the object that Boolean operation will be applied) and tool object (the object that Boolean operation will perform) from the Boolean operation tabs Select type of operation: Subtract, Union, Intersect and Chop

Blank Object

Subtract

Union

Tool Object


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Creating Patterns (Multiple Copies) Lab_Create_Patterns.ep o

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Users can invoke the pattern menu either from the part itself or from the geometry menu “Patterns…” Linear/Rectangular or Circular/Elliptical patterns

Linear Pattern

Elliptical Pattern


Advanced Modify Tools

Chamfer Edges

Blend Edges

Shell

Loft Faces

Offset Faces


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Instructor Demo for Modify Existing Objects


Quiz: o

A Mug.ep

Coffee Break, so can we create a coffee mug?


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4. Export/Import ADS Projects to EMPro


ADS to EMPro Exporter o

EMPro provides ADS to EMPro one-click exporter as an ADS design kit, which can be found from EMPro installation directory  ”EMPro

Installation Directory\data\ADS_Integration\ads_empro_export_dk.zip"

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The design kit will add a new menu selections under ADS Layout, ”FEM/Export to EMPro”

Opens EMPro and creates the EMPro design including material and ports setup Create a self-contained Python script that includes design, material, and ports setup


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Installation/Configuration of ADS to EMPro Exporter o

Install the design kit and edit “hpeesof.cfg” under ADS users directory to add a configuration variable ADS_EMPROHOME shown in the sample below  ADS_EMPROHOME

= ~EMPro Installation Directory\bin\Win32.NET2005

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This configuration variable allows users to start EMPro from ADS layout with the menu pick “Launch EMPro and import this design”


Lab Exercise: Export ADS Design to EMPro Lab_QFN_ADS_prj o

Export ADS layout design “QFN” 

Step1: Open ADS project, “Lab_QFN_ADS_prj”

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Step2: Open ADS layout, “QFN.dsn”

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Step3: Invoke “Launch EMPro and import this design” from FEM menu

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Step4: Save the design and done!


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Exporting ADS Layout to a SAT File o

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ADS layout can be exported to 2D drawing files such as DXF, etc. In this case, only metal structures (2D view) will be exported However the complete 3D geometries can be also exported to SAT files to be imported into EMPro through ADS 3DEM pre-viewer (only from ADS2009 Update1)

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Define “EMPRO_SAT_MENU” environment variable and set it to “1” or “YES” in WINDOWS or Linux

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Restart ADS and launch 3DEM Previewer

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Under File menu, “Write SAT Files” menu is added

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Create a folder and save the files


Importing SAT Files from ADS to EMPro o

Importing the SAT files from ADS takes the same procedures described in the previous session


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Using Python Script Generator (1) o

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From ADS2009 Update1, users can generate Python scripts for the design that can be used with EMPro However this is an unsupported feature with limitations such as no support for bondwires Required to setup Environment Variables

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Define “MOM_MESHER_GENERATION” environment variable and set it to “2” in WINDOWS or Linux

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Define “MOM_WRITE_PROJ_PY” environment variable and set it to “TRUE” in WINDOWS or Linux

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Restart ADS

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Enable “FEM/Pre- Processing/Enable”


Using Python Script Generator (2)  Run

“FEM/Pre-Processing/Precompute to New Design” to generate a python script for the design

 Click

“Yes” when a question dialog is prompted

 Save

to a new design name

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Locate “proj.py” file under “~/mon_dsn/project_name/emprep/” Bring this python script into EMPro scripting window and run to generate the geometry drawing


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EMPro Workshop - Module2 - EMPro Basics Version 2.0

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