Example 1: Monostatic RCS of a Sphere and a Box

In this example, the Monostatic RCS of a box and a sphere is calculated.

Step 1

Start newFASANT.

Step 2

Select File and click on New.

Step 3

Select GTD-PO.

Figure 1. Method Type selection

Step 4

Click on Geometry→Solid→Sphere, which requires the center and the radius, as shown in the next Figure.

In this example the user enters the following values into the command line:

  • Center: 0 0 0
  • Radius: 1.0
Figure 2. Create sphere command

Step 5

Click on Geometry → Solid → Box, which requires the first corner of the base, width, depth, and height as shown in the next Figure.

In this example the user enters the following values into the command line:

  • First corner base: 2.5 -0.5 -0.5
  • Width: 1.0
  • Depth: 1.0
  • Height: 1.0

Step 6

Click on Simulation → Parameters.

Step 7

On the top left side of the newFASANT window, the user can enter the desired parameters for this simulation, as shown in next Figure.

Select 1 bounce (simple reflection) and a frequency of 3.0 GHz and left-click the Save button.

Figure 3. Simulation Parameters panel

Step 8

Select RCS → Parameters.

Figure 4. RCS menu

Step 9

This command appears at the top left side of the newFASANT window as shown in the next Figure.

Select Monostatic RCS only.

Figure 5. RCS panel

Step 10

Select Source→ Parameters.

Figure 6. Source menu

Step 11

Introduce the source position (r, theta, and phi), as shown in the next Figure and left-click on the Save button.

Figure 7. Source panel

Step 12

In the Output tab, introduce the observation information sweep on theta with 181 samples.

Figure 8. Observation directions panel

Step 13

Before running the case, select Meshing → Create Mesh.

Figure 9. Meshing menu

Step 14

Select 1 processor and define the curvature mesh option with a distance error of 0.01 and surface error of 0.08 and left-click on Mesh.

Figure 10. Meshing panel

Left-clicking on Mesh launches the meshing engine as shown in the next Figure:

Step 15

To obtain information about the mesh, select Meshing →Visualize Existing Mesh.

Figure 11. Meshing visualization

Step 16

Select Calculate → Execute and select the number of processors available to simulate this case.

Figure 12. Calculate panel

Figure 13. Process Log panel

Step 17

When the simulation finishes we can visualize the simulation results. Click on Show Results →RCS→ View Cuts, which allows the user to see the RCS graphic.

Figure 14. Show Results menu

Figure 15. RCS visualization

Step 18

Click on Show Results → RCS → View Text Files. Then select the Steps and press OK to see the RCS data file.

Figure 16. File text panel

Step 19

Click on Show Results → Ray Tracing → View Ray. It is possible to represent the ray tracing of the sources interacting with the geometry

Figure 17. Show Results menu

Figure 18. Ray-tracing visualization