Skip to main content

Advanced result processing

Besides the default information and evaluation that CENOS Antenna Design app generates there is a huge amount of manipulations which you can carry out to more deeply analyse results and get additional information out of the results.

In this section we will learn different methods on how to manually analyze antenna simulation results.


Electric/magnetic field on surface#

By default the Electric field on your antenna is visualized.

Electric field

You can change this visualization to see the Magnetic field as well.

To switch between different field visualizations:

  1. Select the right side view (should be highlighted by a blue outline)

  2. Select the Dielectric in the Pipeline browser tree.

Dielectric

  1. Change the field selection to Magnetic field.

Magnetic field

Now the new field is visualized!

Magnetic field2

tip

In the same way you can change visualization for Far Field as well.

  1. Select the left view
  2. Select 3D Far Field in Pipeline Browser
  3. Change the field selection in the dropdown.

Near-field#

For antenna analysis it is often interesting to take a look at the Electric field and see how it is distributed around antenna.

In the example below - patch antenna near-field side view.

Dielectric

To analyze the near-field:

  1. Select the left side view (should be highlighted by a blue outline)

  2. Disable the visibility for 3D Far Field in the Pipeline browser tree.

Dielectric

  1. Select Simulation Data.

Dielectric

  1. Click Filters โ†’ Search.... In search box write Extract Block and press Enter.

Dielectric

  1. In Properties window select air and click Apply.

Dielectric

We have now created a new object in our Tree View - ExtractBlock1, and we can visually see the air domain (sphere) around our geometry.

Dielectric

We need to slice the air domain to analyze the near-field around our antenna.

  1. With ExtractBlock1 selected, click Slice. Position your slice plane (you can change the normals in Properties) and click Apply.

Dielectric

  1. Rescale the Electric Field scale to better see the field around your antenna, and that is it!

Dielectric

Dielectric


Color discretization#

Often when analyzing fields or gradients, it is quite hard to visually evaluate results, as the color distribution is very smooth and blended with the background.

In such cases it is useful to discretize the color table to make the result rougher, but more easily visible.

Dielectric

To discretize color table:

  1. In Pipeline Browser select the object you want to change visualization for and click Edit Color Map.

Dielectric

  1. Color Map Editor will open on the right side of the screen. At the bottom of it you will find Color Discretization section, where you can change the Number Of Table Values.

Dielectric

tip

By default the table value will be 256 - if you decrease it, you can decrease the number of colors used in the visualization, and use that to evaluate the results more closely!

Dielectric


Result accuracy (mesh)#

As the calculation is done and results are displayed, you can evaluate not only the results, but the quality of your simulation as well. The easiest way is to look at the Electric field default visualization.

If you zoom in on your geometry, you can visually examine if the result is good or not. If you see unphysical spikes, it is worth checking the mesh influence on the results.

Magnetic field2

To visualize the mesh over calculated results:

  1. Select the right side view (should be highlighted by a blue outline)

  2. Select the part you want to test in the Pipeline browser tree (Dielectric in this example).

Dielectric

  1. Change the visualization to Surface With Edges.

Dielectric

As you do this, the generated mesh will be visualized on your results, and you will see if the spikes are connected with the mesh!

Dielectric

In this case the spikes are numerical effect caused by coarse mesh, so we should refine the mesh to get more precise results!