• 首页
• HFSS教程
• ADS教程
• CST教程
• 射频工程师培训
• 微波仪器操作培训
• 天线设计培训
• 射频专业基础课

Ansoft Designer / Ansys Designer 在线帮助文档：

Using Component Libraries >
Using the Footprint Editor >
   Creating and Editing Footprints >
       Defining Footprint Handles           

Defining Footprint Handles

Handles appear around the perimeter of a selected element as small squares in the selection color. If the cursor is moved over one of these handles, it changes to indicate its proximity to the handle. When clicking on a handle, the user can then resize or reshape the element based on the handle's reshaping rules.

Component footprints can also have handles which can be specified in the footprint editor. These handles can likewise be used to reshape a component footprint, and at the same time altering one or more of its electrical parameters. In other words, the user can use handles to directly manipulate an element's geometry corresponding to electrical parameters.

Defining a Handle

Open the footprint editor for the footprint desired. From the Draw menu, choose Handle. Next, click to place the handle anywhere in the drawing, exact placement does not matter.

Editing Handle Location

Next, open the property dialog (Edit > Properties). There will be one property listed: location. For this property, edit the X & Y locations to place the handle in the correct position based on the parameters.

Specifying Parameters to Change

Next, click on the Add button in the Property dialog. In the responding dialog, specify the name of the electrical parameter, and the expression, based on the X & Y location of the handle that sets this parameter. For example:

Edit the footprint for the MSTRL component. Place a handle that will be on the top edge of the line. The component has the parameters P for length and W for width. The handle will then have its location (X,Y) set to: (P/2, W/2). One property will be added called "W" and its expression will be "abs(Y*2)". The "abs" (absolute value) of "Y*2" ensures that as Y approaches zero, the line width stays positive. The two entries in the dialog should look like the following:

Location: P/2, W/2

W: abs(Y*2)

How it works

When the user drags the handle, for each new location of the cursor, each of the handles properties are recalculated for that new position. For the TRL example, the y position of the top-side handle will be used to set the line's "w", which will of course be twice that of y. After the new parameter values are calculated, the handle's own position is recalculated based on the updated parameters and the expressions for its location. Thus, as the cursor goes up, the line gets wider, and the handle tracks with the new width.

For more information on Designer handles see:

Selection Modes

Selecting Edges

Selecting Handles

Editing Arcs

Rotating Objects

Selecting Overlapping Objects

Using Handles in Designer

Defining Footprint Handles

The Footprint Draw Menu

The Symbol Draw Menu

                HFSS视频教程                                      ADS视频教程                               CST视频教程                           Ansoft Designer 中文教程

      Copyright © 2006 - 2013   微波EDA网, All Rights Reserved    业务联系：mweda@163.com