MOM 6.2.10

12.2. Radiation Pattern

This menu is only enabled when the Method of Moments is selected on Solver section, and the option Compute 3D Pattern is selected in the Solver - Advanced Options section. The angular step specified in the solver parameters is used for the whole spherical far field sweep, so this section allows to visualize results in these spherical coordinates.

The following results are available within this menu:

Radiation Pattern results menu

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

12.2.1. View Cuts

When the user click on the View Cuts option, the following panel will appear:

Radiation Pattern View Cuts panel. Linear Amplitude.

Radiation Pattern View Cuts panel. Linear Amplitude

This window plots both the amplitude and the phase of the FIELD or GAIN computed in the radiation patter for every angular cut in the full spherical range. To plot a graph, select the desired parameters:

  • Component: The results may be plotted by using different polarizations and its components.
    • Lineal: ETheta, EPhi, ETotal, Ex, Ey and  Ex/Ey Total components.
    • CircularRHCP, LHCP, Circular Total, and AxialRatio components.
    • +/- 45+45 and -45 components.
    • 3rd Ludwig3x Co-Polar, 3x Cross-Polar, 3y Co-Polar, and 3y Cross-Polar components.
    • Gain (dBi): Theta Gain, Phi Gain, RHCP Gain, LHCP Gain and Total Gain components.
  • Frecuencies and Cuts: the far field cuts may be represented for each frequency and direction.
    • Step: To select the geometric step in a parametric simulation. If the geometry does not contain any parameter, only one Step is available.
    • Frequencies: To select the desired frequency in a sweep. If just a frequency has been analyzed, only one Frequency is available.
    • Cuts on...Phi/Theta: so many cuts as specified in the Observation Directions may be plot by using this section.

Then, click on Add Series button to plot the selected curve. Having inserted several plots, the Options section allow to edit the result curves:

  • List of Series: All the plotted polarizations and components are listed. Note that two options are included for every plot: both the amplitude and the phase.
  • 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 X and Y values to be plotted.
  • Export Series:To export the selected curve in the above Plot List in a ".txt" file, with the X and Y values of the plot in a new line.

The user can also switch between the linear graph and the polar graph to visualize far field results. It is possible to visualize the Linear PhasePolar Amplitude and Polar Phase by clicking on their respective tabs.

Radiation Pattern View Cuts panel. Linear Phase

Radiation Pattern View Cuts panel. Linear Phase

Radiation Pattern View Cuts panel. Polar Amplitude

Radiation Pattern View Cuts panel. Polar Amplitude

Radiation Pattern View Cuts panel. Polar Phase

Radiation Pattern View Cuts panel. Polar Phase

12.2.2. View Cuts by Frequency

This otion is only enabled when a Frequency Sweep is chosen within the Simulation Parameters. It allows to compare the results in a given direction according to the frequency. When the user click on the View Cuts By Frequency option, the following panel will appear:

Radiation Pattern View Cuts panel by frequency. Linear Amplitude
 Radiation Pattern View Cuts panel by frequency. Linear Amplitude

This window plots both the amplitude and the phase of the FIELD or GAIN computed for every simulated frequency. It is specially useful when a Frequency Sweep is enabled, as we can compare the field values in each observation direction/point at every frequency. To plot a graph, select the desired observation points:

  • Component: The results may be plotted by using different polarizations and its components.
    • Lineal: ETheta, EPhi, ETotal, Ex, Ey and  Ex/Ey Total components.
    • CircularRHCP, LHCP, Circular Total, and AxialRatio components.
    • +/- 45+45 and -45 components.
    • 3rd Ludwig3x Co-Polar, 3x Cross-Polar, 3y Co-Polar, and 3y Cross-Polar components.
    • Gain (dBi): Theta Gain, Phi Gain, RHCP Gain, LHCP Gain and Total Gain components.
  • Step and Spherical Coords: the far field cuts are represented for each direction in the 3D Pattern
    • Step: To select the geometric step in a parametric simulation. If the geometry does not contain any parameter, only one Step is available.
    • Theta: select the theta direction in the 3D pattern to compare its results according to the frequency.
    • Phi: select the phi direction in the 3D pattern to compare its results according to the frequency.

Then, click on Add Series button to plot the selected curve. Having inserted several plots, the Options section allow to edit the result curves:

  • List of Series: All the plotted polarizations and components are listed. Note that two options are included for every plot: both the amplitude and the phase.
  • 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 X and Y values to be plotted.
  • Export Series:To export the selected curve in the above Plot List in a ".txt" file, with the X and Y values of the plot in a new line.

The user can also switch between the linear graph and the polar graph to visualize far field results. It is possible to visualize the Linear PhasePolar Amplitude and Polar Phase by clicking on their respective tabs.

Radiation Pattern View Cuts panel by frequency. Linear Phase

Radiation Pattern View Cuts panel by frequency. Linear Phase

Radiation Pattern View Cuts panel by frequency. Polar Amplitude

Radiation Pattern View Cuts panel by frequency. Polar Amplitude

Radiation Pattern View Cuts panel by frequency. Polar Phase

Radiation Pattern View Cuts panel by frequency. Polar Phase

12.2.3. View Cuts by Step

This option is useful when a Parametric Simulation has been performed, as the results at each 3D pattern direction may be compared for every parametric step. We can compare the field values in each direction at every frequency. 

When the user click on the View Cuts By Step option, the following panel will appear:

View Cuts by Step panel. Linear Amplitude

View Cuts by Step panel. Linear Amplitude

Select the results to plot according to next options:

  • Component: The results may be plotted by using different polarizations and its components.
    • Lineal: ETheta, EPhi, ETotal, Ex, Ey and  Ex/Ey Total components.
    • CircularRHCP, LHCP, Circular Total, and AxialRatio components.
    • +/- 45+45 and -45 components.
    • 3rd Ludwig3x Co-Polar, 3x Cross-Polar, 3y Co-Polar, and 3y Cross-Polar components.
    • Gain (dBi): Theta Gain, Phi Gain, RHCP Gain, LHCP Gain and Total Gain components.
  • Frequency and Spherical Coords: the 3D pattern cuts are represented for each frequency and direction.
    • Frequencies: To select the desired frequency in a sweep. If just a frequency has been analyzed, only one Frequency is available.
    • Theta:  select the theta direction in the 3D pattern to compare its results according to the parametric steps.
    • Phi:  select the phi direction in the 3D pattern to compare its results according to the parametric steps.

Then, click on Add Series button to plot the selected curve. Having inserted several plots, the Options section allow to edit the result curves:

  • List of Series: All the plotted polarizations and components are listed. Note that two options are included for every plot: both the amplitude and the phase.
  • 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 X and Y values to be plotted.
  • Export Series:To export the selected curve in the above Plot List in a ".txt" file, with the X and Y values of the plot in a new line.

The user can also switch between the linear graph and the polar graph to visualize far field results. It is possible to visualize the Linear PhasePolar Amplitude and Polar Phase by clicking on their respective tabs.  

View Cuts by Step panel. Linear Phase

View Cuts by Step panel. Linear Phase

View Cuts by Step panel. Polar Amplitude

View Cuts by Step panel. Polar Amplitude

View Cuts by Step panel. Polar Phase

View Cuts by Step panel. Polar Phase

12.2.4. View Text Files

The values of the field components of the full radiation pattern may be visualized 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.
  • Current Frequencies: for the selected Step, a list of all the simulated frequencies is available.

When a simultaion of an unique step and frequency is performed, the corresponding file text is directly opened to the left side of the Far Field File Text panel.

Click on Save as button to save the text file in the desired path.

12.2.5. View 3D Pattern

This option allows to visualize the full 3D pattern, classified by parametric and frequency steps. The next figure shows and example of 3D pattern:

3d radiation pattern

3D Radiation Pattern diagram

The following elements are available within this panel:

  • Left color legend: it shows the magnitude and range of values of the represented results.
  • Step and Frequency: to select the results from the available files to plot the diagram.
    • Step: specify the parametric step when a parametric simulation has been run.
    • Frequency: specify the desired frequency.
  • Component: The 3D diagram may be plotted by using different polarizations and its components.
    • Lineal: ETheta, EPhi, ETotal, Ex, Ey and  Ex/Ey Total components.
    • CircularRHCP, LHCP, Circular Total, and AxialRatio components.
    • +/- 45+45 and -45 components.
    • 3rd Ludwig3x Co-Polar, 3x Cross-Polar, 3y Co-Polar, and 3y Cross-Polar components.
    • Gain (dBi): Theta Gain, Phi Gain, RHCP Gain, LHCP Gain and Total Gain 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.
  • Radius: Use this slider to increase or decrease the size of the 3D pattern representation.
  • Radiated Power: Shows information about the effective radiated power (ERP), in watts.
  • Bottom Options: Below the 3D pattern diagram, the following options are included:
    • Options: Disable this option to hide the left menus and visualize just the diagram.
    • Show Grid: Enable this option to show a line grid in the 3D pattern.
    • Show Geometry: Enable this option to visualize the geometry together the 3D pattern. Note that the 3D pattern is always represented in the origin of coordinates.
    • Transparent: Enable this option to add a transparency property to the visualized diagram.
    • Save as: To export the current representation as an image file.

12.2.6. Export as DIA File

This menu allows the user to export the radiation diagram into a DIA file to use it later in another project. After clicking on this option, a new panel is opened on right side with some options to export the desired DIA file:

  • 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.

Click on OK button to confirm and export the selected file, and then select the desired Path to save the file.

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