Table of Contents
Tutorial for XFDTD
XFDTD
To start XFDTD at USU
Other versions of XFDTD available:
This is what the XFDTD Window Looks Like
To Create an FDTD Grid Space:
Define the FDTD Grid
View the Grid.
This will show you the grid. So far it contains only air.
To change the plane you are viewing:
Edit the Menu of Electrical Material Parameters
Edit Electrical Properties of the Materials to be in your model
Display the Edit Panel to Draw or Edit your Model
Here are Several Model Elements
The Library has Other Elements
Let’s Start with a Single-Cell “Wire” made of Material 2
PPT Slide
See How a Cube of Material is Defined in this layer:
And in the Layer Above it
Draw the Teflon Box for Patch Antenna on Slice 25
Add Another Layer
And Another
The Top is Slice 28
But we want the top of the patch antenna to be metal, so choose the plate element and change it to Material 1 (PEC)
Add a plate to the bottom, too.
Look at this “sandwich” in the yz and xz planes
We want to add a feedpoint to the center. Use the cursor to find where this is.
Look at the feed location
Use Single Cell Wire (PEC) from Edit Panel
Use these wires to connect top to bottom plate, leaving one cell gap for voltage feed source
Find the Location of the Feed Point Gap with the Cursor
Open Voltage Sources Panel
Choose a Source and “Add Feed to List”. You may have several sources.
Close the Source Window, and Reopen It to see the source location on your grid.
Define what you want FDTD to save after calculation
Save your geometry
Save FDTD Parameters
Run FDTD
This is what is displayed
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Author: Cindy Furse
Email: furse@ece.usu.edu
Home Page: http://www.engineering.usu.edu/ece/faculty/furse/index.html
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