Ansys Maxwell Q3D指导.pdf

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Getting Help

ANSYS Technical Support

Introduction

The Via Model

Creating the Via Model

Open Q3D Extractor and Save a New Project

Set the Drawing Units

Create the Via’s Central Barrel

Create the First Via Pad

Duplicate the First Via Pad

Create Geometric Variables

Assign a Variable to the Center Barrel

Assign a Variable to the Pads

Draw the Trace Stubs

Unite Via Objects

Create the Ground Plane

Create the Antipad

Define the Background Material

Setting Up the Simulation

Set Up Sources and Sinks

Define the Source

Assign the Sink

Identify the Nets

Add a Solution Setup

Validate the Setup

Solve the Problem

Generate a Field Plot

Export a Circuit Model

Setting Up a Parametric Analysis

Add a Parametric Sweep

Run the Parametric Analysis

Comparing the Solutions

Plot the Results

Plot the Results After Changing Capacitance

Modify the Pad Radius

Run Parametric Analysis

Plot Results

Close the Project and Exit Q3D Extractor

Getting Started with Q3D Extractor ® A 3D PCB Via Model ANSYS, Inc. 275 Technology Drive Canonsburg, PA 15317 USA Tel: (+1) 724-746-3304 Fax: (+1) 724-514-9494 General Information: AnsoftInfo@ansys.com Technical Support: AnsoftTechSupport@ansys.com November 2011 Inventory 0000000329

The information contained in this document is subject to change without notice. ANSYS makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a partic- ular purpose. ANSYS shall not be liable for errors contained herein or for incidental or consequential damages in connec- tion with the furnishing, performance, or use of this material. ANSYS, Inc, is a UL registered ISO 9001:2008 company. Unauthorized use, distribution, or duplication is prohibited. © 2011 SAS IP, Inc. All rights reserved. ANSYS and Q3D Extractor are registered trademarks or trade- marks of SAS IP, Inc. All other trademarks are the property of their respective owners. New editions of this manual incorporate all material updated since the previous edition. The manual printing date, which indicates the manual’s current edition, changes when a new edition is printed. Minor corrections and updates that are incorporated at reprint do not cause the date to change. Update packages may be issued between editions and contain additional and/or replacement pages to be merged into the manual by the user. Pages that are rearranged due to changes on a previous page are not considered to be revised. Edition Date 1 2 3 4 February 2008 April 2010 October 2010 November 2011 Software Version 8 9 10 11

Getting Started with 2D Extractor Conventions Used in this Guide Please take a moment to review how instructions and other useful information are presented in this guide. • Procedures are presented as numbered lists. A single bul- let indicates that the procedure has only one step. • Bold type is used for the following: - Keyboard entries that should be typed in their entirety exactly as shown. For example, “copy file1” means to type the word copy, to type a space, and then to type file1. - On-screen prompts and messages, names of options and text boxes, and menu commands. - Labeled keys on the computer keyboard. For example, “Press Enter” means to press the key labeled Enter. • Menu commands are often separated by the “>” symbol. For example, “Click Draw>Cylinder”. • Italic type is used for the following: - Emphasis. - The titles of publications. - Keyboard entries when a name or a variable must be typed in place of the words in italics. For example, “copy file name” means to type the word copy, to type a space, and then to type a file name. • The plus sign (+) is used between keyboard keys to indi- cate that you should press the keys at the same time. For example, “Press Shift+F1” means to press the Shift key and the F1 key at the same time. Alternate methods or tips are listed in the left margin in blue italic text. 2

Getting Started with 2D Extractor Getting Help ANSYS Technical Support To contact ANSYS technical support staff in your geographical area, please log on to the ANSYS corporate website, https:// www1.ansys.com. You can also contact your ANSYS account manager in order to obtain this information. All ANSYS software files are ASCII text and can be sent conve- niently by e-mail. When reporting difficulties, it is extremely helpful to include very specific information about what steps were taken or what stages the simulation reached, including software files as applicable. This allows more rapid and effec- tive debugging. 3

Getting Started with 2D Extractor 4

Table of Contents 1. Introduction The Via Model . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2. Creating the Via Model Open Q3D Extractor and Save a New Project . 2-2 Set the Drawing Units . . . . . . . . . . . . . . . . . . . . 2-2 Create the Via’s Central Barrel . . . . . . . . . . . . . 2-3 Create the First Via Pad . . . . . . . . . . . . . . . . . . . 2-3 Duplicate the First Via Pad . . . . . . . . . . . . . . . . 2-4 Create Geometric Variables . . . . . . . . . . . . . . . 2-5 Assign a Variable to the Center Barrel . . . . . . . 2-6 Assign a Variable to the Pads . . . . . . . . . . . . . . 2-6 Draw the Trace Stubs . . . . . . . . . . . . . . . . . . . . 2-7 Unite Via Objects . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Create the Ground Plane . . . . . . . . . . . . . . . . . . 2-9 Create the Antipad . . . . . . . . . . . . . . . . . . . . . . . 2-10 Define the Background Material . . . . . . . . . . . . 2-12 Contents-1

Getting Started with Q3D Extractor: A PCB Via Model 3. Setting Up the Simulation Set Up Sources and Sinks . . . . . . . . . . . . . . . . . 3-2 Define the Source . . . . . . . . . . . . . . . . . . . . . . 3-2 Assign the Sink . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Identify the Nets . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Add a Solution Setup . . . . . . . . . . . . . . . . . . . . . 3-6 Validate the Setup . . . . . . . . . . . . . . . . . . . . . . . 3-6 Solve the Problem . . . . . . . . . . . . . . . . . . . . . . . 3-7 Generate a Field Plot . . . . . . . . . . . . . . . . . . . . . 3-8 Export a Circuit Model . . . . . . . . . . . . . . . . . . . . 3-9 4. Setting Up a Parametric Analysis Add a Parametric Sweep . . . . . . . . . . . . . . . . . . 4-2 Run the Parametric Analysis . . . . . . . . . . . . . . . 4-3 5. Comparing the Solutions Plot the Results . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Plot the Results After Changing Capacitance . . 5-4 Modify the Pad Radius . . . . . . . . . . . . . . . . . . 5-4 Run Parametric Analysis . . . . . . . . . . . . . . . . . 5-4 Plot Results . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 Close the Project and Exit Q3D Extractor . . . . . 5-7 Contents-2

1 Introduction This Getting Started Guide leads you step-by-step through creating, solving, and analyzing the results of a parame- terized 3D model representing a via on a Printed Circuit Board. By following the steps in this guide, you will learn how to perform the following tasks in Q3D: Draw a geometric model. Set up vias and traces. Modify a model’s design parameters. Assign variables to a model’s design parameters. Specify solution settings for a design. Validate a design’s setup. Run a simulation. Create a plot of results. Estimated time to complete this guide: 60 minutes. Introduction 1-1

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