MOM 6.2.10

12.5. Near Field

This menu is only enabled with any observation point has been added in Output - Observation points section. Witihin this menu, the following options are available to visualize different results on near field.

Near Field menu

The results represented in this section are corresponding to the MOM - Example 10.

12.5.1. View Near Field Diagram

After clicking on Show Results - Near Field - View Near Field Diagram, a new panel is opened on right side to select which observation points are considered in the diagram. In this panel, the following options are available:

  • Step: To specify the step results files when a parametric simulation has been run.
  • Frequency: To specify the desired frequency results files when a frecuency sweep has been run.
  • Observation points: List with all the observation points entities defined. Select the desired ones to plot the near field results.
  • Select all: Click on this button to select all the observation points entities.
  • Ok: Confirm the observation points to plot and open the Near Field 3D diagram.

Then, the options available in the Near Field 3D results panel are listed:

near field plane

 Near Field diagram

  • Left color legend: it shows the magnitude and range of values of the represented results.
  • Incidence: The near field may be plotted by considering different contributions on the observation points.
    • Scatter: Scattered field components.
    • Direct: Direct field components.
    • Total: Combination of the scattered field plus the direct field components.
  • Magnitude: The near field may be represented in natural or dBs magnitudes.
    • dBs: The near field is represeneted in logarithmic scale, given in dB-Amperes per meter for magnetic field, or in dB-Volts per meter for electric field.
    • nat: The near field is represeneted in natural scale, given in Amperes per meter for magnetic field, or in Volts per meter for electric field.
  • Field Component: To specify the field component to plot. Only one component may be selected:
    • Ex: Plot the X component of electric field.
    • Ey: Plot the Y component of electric field.
    • Ez: Plot the Z component of electric field.
    • ETotal: Plot the total electric field, which is the combination of the X, Y and Z components.
    • Hx: Plot the X component of magnetic field.
    • Hy: Plot the Y component of magnetic field.
    • Hz: Plot the Z component of magnetic field.
    • HTotal: Plot the total magnetic field, which is the combination of the X, Y and Z components.
  • Filtering Range: Use this section to skip results that are outside the desired range.
    • Enable Filtering: The filter only is applied when this check box is selected.
    • Max: To specify the maximum value of the range.
    • Min: To specify the minimum value of the range.
    • Filter: Click on this button to update the results filtering.
  • Bottom Options: Below the near field diagram, the following options are included:
    • Options: Disable this option to hide the left menu and visualize just the near field diagram.
    • Show Grid: Enable this option to visualize the grid of the near field observation entity.
    • Show Geometry: Enable this option to visualize the meshed geometry together the near field diagram.
    • Show Axis: Enable this option to show the coordinate axes.
    • Save as: To export the current representation as an image file. 

12.5.2. View Observation Points

Use this option to plot curves of near field components along the observation points. Note that the observation points are listed in the X axis, so its order may vary the curve shape. Click on Show Results - Near Field - View Observation Points, and the below window will appear:

View Observation Points

View Observation Points panel 

Within this window, the following options are available:

  • Incidence: The near field may be plotted by considering different contributions on the observation points.
    • Scatter: Scattered field components.
    • Direct: Direct field components.
    • Total: Combination of the scattered field plus the direct field components.
  • Magnitude: The near field may be represented in natural or dBs magnitudes.
    • dBs: The near field is represeneted in logarithmic scale, given in dB-Amperes per meter for magnetic field, or in dB-Volts per meter for electric field.
    • nat: The near field is represeneted in natural scale, given in Amperes per meter for magnetic field, or in Volts per meter for electric field.
  • Component: To specify the field component to plot. Only one component may be selected:
    • Ex: Plot the X component of electric field.
    • Ey: Plot the Y component of electric field.
    • Ez: Plot the Z component of electric field.
    • ETotal: Plot the total electric field, which is the combination of the X, Y and Z components.
    • Hx: Plot the X component of magnetic field.
    • Hy: Plot the Y component of magnetic field.
    • Hz: Plot the Z component of magnetic field.
    • HTotal: Plot the total magnetic field, which is the combination of the X, Y and Z components.
  • Step, Frequency and Observation: Select the observation points to plot.
    • Step: To specify the step results files when a parametric simulation has been run.
    • Frequency: To specify the desired frequency results files when a frecuency sweep has been run.
    • Observation points: List with all the observation points entities defined. Select the desired ones to plot the near field results.
    • Add series: Confirm the observation points to plot and add its curve.
  • Options: Having inserted several plots, the Options section allow to edit the result curves:
    • List of Series: All the plotted field components are listed. Note that two options are included for every plot for most of components: both the amplitude and the phase. However, ETotal and HTotal only represent the module.
    • View points: Enable this option to visualize the points where the field has been computed for every inserted plot.
    • Change color: This option allows to change the color of the selected curve in the above List of Series.
    • Remove: To delete the selected curve in the above List of Series.
    • Import Series: To add a new plot from an external file. The file must have ".txt" extension, and it must contain in every new line the point index and the values to be plotted.
    • Export Series:To export the selected curve in the above Plot List in a ".txt" file, with the point index and the value of the plot in a new line.
  • Options check box: Disable this option to hide the left menu and visualize just the near field curves.

12.5.3. View Observation Points By Frequency

This option allow to compare the near field values in a given observation point according to the frequency. It is only useful if a Frequency Sweep has been run. Click on Show Results - Near Field - View Observation Points By Frequency, and the next window will appear:

View Observation Points By Frequency

View Observation Points By Frequency panel (Module)

Within this window, the following options are available:

  • Incidence: The near field may be plotted by considering different contributions on the observation points.
    • Scatter: Scattered field components.
    • Direct: Direct field components.
    • Total: Combination of the scattered field plus the direct field components.
  • Magnitude: The near field may be represented in natural or dBs magnitudes.
    • dBs: The near field is represeneted in logarithmic scale, given in dB-Amperes per meter for magnetic field, or in dB-Volts per meter for electric field.
    • nat: The near field is represeneted in natural scale, given in Amperes per meter for magnetic field, or in Volts per meter for electric field.
  • Component: To specify the field component to plot. Only one component may be selected:
    • Ex: Plot the X component of electric field.
    • Ey: Plot the Y component of electric field.
    • Ez: Plot the Z component of electric field.
    • ETotal: Plot the total electric field, which is the combination of the X, Y and Z components.
    • Hx: Plot the X component of magnetic field.
    • Hy: Plot the Y component of magnetic field.
    • Hz: Plot the Z component of magnetic field.
    • HTotal: Plot the total magnetic field, which is the combination of the X, Y and Z components.
  • Step and Observation Points: Select the observation points to plot.
    • Step: To specify the step results files when a parametric simulation has been run.
    • Observation points: List with all the observation points entities defined. Select the desired ones to load the next list.
    • Point: Specify the index point within the observation entities selected above to compare its values along the frequency.
    • Add series:Confirm the observation points to plot and add its curve.
  • Options: Having inserted several plots, the Options section allow to edit the result curves:
    • List of Series: All the plotted field components are listed. Note that two options are included for every plot for most of components: both the amplitude and the phase. However, ETotal and HTotal only represent the module.
    • View points: Enable this option to visualize the points where the field has been computed for every inserted plot.
    • Change color: This option allows to change the color of the selected curve in the above List of Series.
    • Remove: To delete the selected curve in the above List of Series.
    • Import Series: To add a new plot from an external file. The file must have ".txt" extension, and it must contain in every new line the point index and the values to be plotted.
    • Export Series:To export the selected curve in the above Plot List in a ".txt" file, with the point index and the value of the plot in a new line.
  • Options check box: Disable this option to hide the left menu and visualize just the near field curves.

View Observation Points By Frequency phase

View Observation Points By Frequency panel (Phase)

12.5.4. View Observation Points By Step

This option allow to compare the near field values in a given observation point according to the geometric configuration (or parametric step). It is only useful if the geometry depends on one or more parameters which have multiple values. Click on Show Results - Near Field - View Observation Points By Step, and the next window will appear:

View Observation Points By Step panel (module)

View Observation Points By Step panel (Module)

Within this window, the following options are available:

  • Incidence: The near field may be plotted by considering different contributions on the observation points.
    • Scatter: Scattered field components.
    • Direct: Direct field components.
    • Total: Combination of the scattered field plus the direct field components.
  • Magnitude: The near field may be represented in natural or dBs magnitudes.
    • dBs: The near field is represeneted in logarithmic scale, given in dB-Amperes per meter for magnetic field, or in dB-Volts per meter for electric field.
    • nat: The near field is represeneted in natural scale, given in Amperes per meter for magnetic field, or in Volts per meter for electric field.
  • Component: To specify the field component to plot. Only one component may be selected:
    • Ex: Plot the X component of electric field.
    • Ey: Plot the Y component of electric field.
    • Ez: Plot the Z component of electric field.
    • ETotal: Plot the total electric field, which is the combination of the X, Y and Z components.
    • Hx: Plot the X component of magnetic field.
    • Hy: Plot the Y component of magnetic field.
    • Hz: Plot the Z component of magnetic field.
    • HTotal: Plot the total magnetic field, which is the combination of the X, Y and Z components.
  • Frequency and Observation Points: Select the observation points to plot.
    • Frequencies: To specify the desired frequency results files when a frecuency sweep has been run.
    • Observation points: List with all the observation points entities defined. Select the desired ones to load the next list.
    • Point: Specify the index point within the observation entities selected above to compare its values along the frequency.
    • Add series:Confirm the observation points to plot and add its curve.
  • Options: Having inserted several plots, the Options section allow to edit the result curves:
    • List of Series: All the plotted field components are listed. Note that two options are included for every plot for most of components: both the amplitude and the phase. However, ETotal and HTotal only represent the module.
    • View points: Enable this option to visualize the points where the field has been computed for every inserted plot.
    • Change color: This option allows to change the color of the selected curve in the above List of Series.
    • Remove: To delete the selected curve in the above List of Series.
    • Import Series: To add a new plot from an external file. The file must have ".txt" extension, and it must contain in every new line the point index and the values to be plotted.
    • Export Series:To export the selected curve in the above Plot List in a ".txt" file, with the point index and the value of the plot in a new line.
  • Options check box: Disable this option to hide the left menu and visualize just the near field curves.

 View Observation Points By Step panel (phase)

View Observation Points By Step panel (Phase)

12.5.5. View Radial Points

This option is only enabled when the user has set up several observation spheres within the Output - Observation Points section. It plots the near field for each observation spheres in the desired direction versus the radius. After clicking on Show Results - Near Field - View Radial Points, the next window is open.

Radial Field (module)

Radial Field results (Module)

Within this window, the following options are available:

  • Incidence: The near field may be plotted by considering different contributions on the observation points.
    • Scatter: Scattered field components.
    • Direct: Direct field components.
    • Total: Combination of the scattered field plus the direct field components.
  • Magnitude: The near field may be represented in natural or dBs magnitudes.
    • dBs: The near field is represented in logarithmic scale, given in dB-Amperes per meter for the magnetic field, or in dB-Volts per meter for the electric field.
    • nat: The near field is represented in natural scale, given in Amperes per meter for the magnetic field, or in Volts per meter for the electric field.
  • Component: To specify the field component to the plot. Only one component may be selected:
    • Ex: Plot the X component of the electric field.
    • Ey: Plot the Y component of the electric field.
    • Ez: Plot the Z component of the electric field.
    • ETotal: Plot the total electric field, which is the combination of the X, Y and Z components.
    • Hx: Plot the X component of magnetic field.
    • Hy: Plot the Y component of magnetic field.
    • Hz: Plot the Z component of magnetic field.
    • HTotal: Plot the total magnetic field, which is the combination of the X, Y and Z components.
  • Step, Frequency, Observation and Coords: Select the observation points to plot.
    • Step: To specify the step results files when a parametric simulation has been run.
    • Frequency: To specify the desired frequency results files when a frequency sweep has been run.
    • Observation Spheres: List with all the different observation spheres entities that have been defined. Select the desired one to specify the direction in the next fields.
    • Theta Cut: Spherical theta angle within the above-selected observation sphere, in degrees.
    • Phi Cut: Spherical theta angle within the above-selected observation sphere, in degrees.
    • Add series: Confirm the observation points to plot and add its curve.
  • Options: Having inserted several plots, the Options section allow to edit the result curves:
    • List of Series: All the plotted field components are listed. Note that two options are included for every plot for most of the components: both the amplitude and the phase. However, ETotal and HTotal only represent the module.
    • View points: Enable this option to visualize the points where the field has been computed for every inserted plot.
    • Change color: This option allows to change the color of the selected curve in the above List of Series.
    • Remove: To delete the selected curve in the above List of Series.
    • Import Series: To add a new plot from an external file. The file must have ".txt" extension, and it must contain in every new line the point index and the values to be plotted.
    • Export Series: To export the selected curve in the above Plot List in a ".txt" file, with the point index and the value of the plot in a new line.
  • Options check box: Disable this option to hide the left menu and visualize just the near field curves.

Radial Field results (Phase)

Radial Field results (Phase)

12.5.6. View Text Files

The values of the near field components on the observation points may be visualized and exported as a text file within this menu. When click on this option, a new tab-panel is opened on right side with some options to select the results to visualize:

  • Step: to select the results corresponding to a given status of the parametric simulation.
  • Frequency: for the selected Step, a list of all the simulated frequencies is available.

Viewing near field values in text format

 When a Text File is visualized, click on Export button to save it as a text file in the desired path.

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