GTD 6.3

14.1. Example 1: Getting Started

In this section a simple example of a Far Field simulation will be shown. This simulation will be performed considering a cube as the geometry. An antenna will be configured to feed this geometry.


Step 1. The first step consists of creating a new data file where all the parameters of the simulation will be saved. Use the command ‘New’ from the File menu. Select GTD type.



Selection Method dialog box


Step 2. The second step is to generate the box. Select Geometry→ Solid → Box. It will be located at (0,0,0) and the dimensions are 1x1x1 m.



Create box


Box situated at (0,0,0)


Step 3. The next step is to set the main parameters of the simulations, which are located in Simulation Parameters Menu → Simulation.

A dialogue box appears. In this menu, the frequency, number of antennas, kind of simulation, effects to calculate, and other parametersmust be defined before running the simulation. In this example, a radiation pattern file in far field is simulated. The user will introduce:

·         Far field in Simulation Type.

·         The number of frequency points and the frequency: in this example 1 and 2.4 GHz.

·         The effect order will be 1.


The rest of the options are the default ones

Parameters dialog box


Step 4. Define an antenna over the cube clicking on Antenna →Dipole Antenna. The position of the dipole will be (0.0, 0.0, 1.2).


Dipole Antenna dialog box


Dipole Antenna dialog box


Step 5. The next step is to situate the Far Field Observation. Select Observation directions from the Output menu. In the Angular Sweep Type dialog select one cut in Phi = 0 degrees and 10 points in theta from 0 degrees to 360 degrees. Select Theta as the Angular Sweeptype.


Far Field Observation dialog box


Step 6. To mesh the geometry click on Meshing → Create visibility matrix and select the number of processors.



Processors option for meshing





Step 7. Execute the simulation by selecting Calculate → Execute and introduce the number of processors to be used.


Processors options for Execute







Step 8. After obtaining the results, choose view ray from show results. It is possible to visualize order 1 rays.It is possible to represent the ray tracing interacting with the geometry.


Ray Viewer dialog box


Step 9. It is possible to select a ray to show its information. Clicking in one of the ray will fill its information in the bottom of the panel.


Viewing the ray information



Step 10. To visualize the charts click on Show Results →Far Field →View Cuts, after which the following dialog will be shown:


Far field


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