Notes

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Outline

1	Tutorial for XFDTD Written by Cynthia Furse University of Utah
2	XFDTD 3D Finite Difference Time Domain code Written by Remcom, Inc. http://www.remcom.com
3	To start XFDTD in the CADE Lab type 'xfdtd53' in a shell.
4	Geometry File
5	This is what the XFDTD Window Looks Like
6	To Create an New Geometry:
7	Define the FDTD Grid
8	View the Grid.
9	This will show you the grid. So far it contains only air.
10	To change the plane you are viewing:
11	Edit the Menu of Electrical Material Parameters
12	Add Electrical Materials
13	Edit Electrical Properties of the Materials to be in your model
14	Edit the Color for Your Material
15	Display the Edit Panel to Draw or Edit your Model
16	Here are Several Model Elements
17	Start to Define Your Geometry
18	The Library has Other Elements
19	Let’s Start with a Single-Cell “Wire” made of Material 2, What I Named Substrate
20
21	See How a Cube of Material is Defined in this layer:
22	And in the Layer Above it
23	Draw the Teflon Box for Patch Antenna on Slice 25
24	Add Another Layer
25	And Another Layer
26	The Top is Slice 28
27	But we want the top of the patch antenna to be metal, so choose the plate element PEC
28	Add a plate to the bottom, too.
29	Look at this “sandwich” in the yz and xz planes
30	We want to add a feedpoint to the center of the patch. Use the cursor to find where this is.
31	Look at the feed location
32	Use Single Cell Wire (PEC) from Edit Panel
33	Use these wires to connect top to bottom plate, leaving one cell gap for voltage feed source
34	Find the Location of the Feed Point Gap with the Cursor
35	Save Your Geometry Now you have created your geometry file You have found where to put your source Save your geometry as ~.id file
36	Types of Simulations
37	Transient Simulation: Open Voltage Sources Panel
38	Choose a Source and “Add Port to List”. You may have several sources.
39	A note on # of Time Steps
40	Close the Source Window, and Reopen It to see the source location on your grid.
41	Define what you want FDTD to save after calculation
42	Save your geometry again
43	Save FDTD Parameters as a .fdtd file
44	Run FDTD
45	This is what is displayed
46	Simulation Starts
47	XY Plane of EM Field
48	Display Results
49	Simulation S-parameters Results
50	S11 Response
51	Impedance Measurements
52	Real Impedance Response
53
54	Steady State Simulation
55	Radiation Pattern (E-field) Set Up
56	Run FDTD
57	Display Steady State Data
58	Steady State Data
59	Radiation Pattern
60	Radiation Plot Setup
61	Display Plot
62	Plot Setup
63	Change to Polar Plot Format
64	Radiation Pattern
65	End of Tutorial