Click or drag to resize

Boxed Region

The Boxed Region field probe is a powerful tool with inherent algorithms to process data and record the data in a useful and common format. Boxed Region field probes encompass and process data from many mesh nodes within a volume in the geometric model specified by the User to capture both peak and null features of electromagnetic fields, which could be missed when using data from a single node.

For calculating the electromagnetic fields,EMA3D performs a Fast Fourier Transform of each location and averages the raw values together. Finally, EMA3D then performs another pass and "smooths" them out by averaging neighboring frequencies together with a sliding window. EMA3D can perform a running bandwidth average on the field data, as well. The bandwidth averaging percentage can be adjusted in the Settings menu, if desired.

Defining a Boxed Region probe

  1. Click Field Field Probe Image 16 within the Probes section under the EMA3D tab in the ribbon. Then click Boxed Region in the drop-down list.

    boxprobe selection

    Alternatively, right click Probes in the Simulation Tree. Select Probe Field Image 16 Field Probe and then Boxed Region from the pop-up menus.

    box probe 6

  2. The default probe field type is Electric, suitable to measure the electric field within the boxed region. In order to measure the magnetic field, change the probe field type to Magnetic in the Properties panel. In the properties panel, the time properties can also be adjusted. The meaning of each property can be found in the table at the bottom of this page.

    box probe properties

  3. Two options for setting the probe will appear in the top left of the model window.

    box probe 0

  4. The top, default option Drag Box Image 16 can be selected to define the integration boundaries of the boxed region probe using a drag box with directional arrows that appears in the model window. To adjust the size and position of the boxed region for the probe drag the red, blue, and green directional arrows. Alternatively, coordinates of the probe can also be entered manually in the Properties panel. The box can be any dimension (i.e., point, plane, or box).

    box probe 1

  5. Click OK Check Image 16 to create the probe. A series of green points will appear indicating the lattice point locations (where probe measurements will be taken) included within the probe boundaries.

    box probe 15

  6. Boxed Region probes can also be set to encompass structures. To set a probe using this method, click on the Select Body Select Body Image 16 tool in the top left of the model window and then select a component in the structure tree or directly in the model window. The structure will be highlighted when hovered over.

    box probe 2

  7. The directional arrows can now be used to further refine the probe. Click OK Check Image 16 to create the probe. A series of green points will appear indicating the lattice point locations (where probe measurements will be taken) included within the probe boundaries.

    box probe 3

  8. Click OK Check Image 16 to create the probe.

  9. The probe should now be visible in the model window and should be added to the Simulation Tree under the Probes node as Field Probe.

    box probe 4

  10. The probe can be edited at any time by right clicking it in the Simulation Tree and selecting Edit from the pop-up menu.

    box probe 5

  11. To visualize the Boxed Region Probe results, see here.

Boxed Region Probe Properties

Entry

Meaning

Field Type

The field quantity to measure. It can be set to Electric or Magnetic to measure the electric field or the magnetic field

Max Samples

Maximum number of lattice locations within the probe boundaries to probe -used to constrain the size of the output files

Minimum [mm]

The minimum values (X, Y, Z) for the probe boundaries

Maximum [mm]

The maximum values (X, Y, Z) for the probe boundaries

Start [s]

The time the probe starts recording data. The default start time matches the simulation start time. Start can be changed only if the field Match Domain is set to False (White text indicates field set to False, blue text indicates field set to True)

Step [s]

To which domain to match the probe time step:

  • Domain matches the probe time step to the FDTD domain time step

  • Frequency sets the probe time step such that it captures up to the highest supported frequency of the domain (this time step is coarser than the Domain time step and results in smaller files)

  • False allows the user to set the probe time step value manually

End [s]

The time the probe stops recording data. The default end time matches the simulation end time. End can be changed only if the field Same as Simulation is set to False

See Also

EMA3D - © 2025 EMA, Inc. Unauthorized use, distribution, or duplication is prohibited.