MONCROS 6.2.9

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12.2. NearField

These settings are used to inspect the near field using the observation points previously defined in Observation points. It is neccesary therefore to define at least one observation points structure in the corresponding panel at the Output menu. Observation points also require the RCS to be configured in bistatic mode.

Near Field menu.

The following menu items are available:

  • View Near Field: display a 3D View with the measurements for every observation point in the near field.
  • View Observation Points: display a plot with the measurements for each observation point in the near field.
  • View Radial Points: displays a radial plot with measurements made in the different radii for spheres.
  • View Obervation Points by Frequency: displays a plot with the measurements for a particular observation point against a frequency sweep.
  • View Observation Points by Step: displays a plot with the measurements for a particular observation point against parametric steps.
  • View Text Files: displays numerical results as given by the simulation process.

12.2.1. View Near Field

This option can be used to present in a 3D View the value for each user defined observation points.

After selecting this option, the following panel will be displayed, where the user will be requested to select a step, a frequency and one or more observation points. Select one or more geometry figures and press OK to render the 3D Near Field.

 View Near Field panel

The diagram shows, for every structure defined as an observation point, the near field measurement in every point of the structure. For each geometry, values will be rendered with a diferent color that is smoothed, creating a grid matrix where every observation point is assigned to a color. Colors are part of a measurement system where blue is asigned to the lowest values and red to the highest values.

 

Near Field diagram

The following options are available:

  • Incidence: possible values are scatter incidence, direct incidence or total incidence.
  • Magnitude: which units to use in measurements. Units affect to the color scale being used.
  • Field Component: which field component to inspect, from either the E-field or the H-field, and whether to inspect the X, Y or Z component or the total field.
  • Filtering Range: if filtering is enabled, a custom range can be set in the measurement system, setting maximum and minimum values in the rendering view to the values provided by the user.

Adittionally, the following options are available at the bottom bar:

  • Options: hides and shows the options panel that appears on the left.
  • Show Grid: if this option is selected, a grid with every observation point will be overlayed to the rendered figure, making possible to precisely see which value has every observation point defined in the geometry.
  • Show geometry: use this option to make the geometry visible or not.
  • Show Axis: use this option to hide or show the axis.

It is also possible to export a graphical representation of the image. Press Save as... to save the image as a PNG file.

12.2.2. View Observation Points

This option shows the observation points as a plot. If multiple theta and phi cuts have been defined, the user will be requested to select one particular cut to use this tool. A dialog like this one will be presented to the user.

View Observation Points dialog

Select the theta or phi cut using the controls and press OK. After selecting the desired options and pressing OK, the following screen will be shown:

View Observation Points panel

The controls on the left let the user add, modify and delete series. Using the visible controls the user can select a series to add using the following settings:

  • Incidence: which kind of near field incidence to add: scatter incidence, direct incidence or total incidence.
  • Field Component: which field component to inspect, from either the E-field or the H-field, and whether to inspect the X, Y or Z component or the total field.
  • Step: on simulation projects that make use of step, the user can select the step number to add.
  • Frequencies: on simulation projects that make use of multiple frequencies, the user can select one particular frequency to add.
  • Observation points: on simulation projects that make use of multiple observation point structures, the user can select one of the geometries.

Press the Add Series button to add the series to the graph. Note that if multiple cuts exists, a dialog similar to the one that appeared before will be presented to the user again asking to select a particular theta cut or phi cut.

It is possible to modify already existing series too. The user canset the color for the series, which is useful when multiple series have been added to the plot. Select the series using the List of series control, and press Change colors to modify the color used to render the series. Aditionally, a series can be removed if it's not relevant anymore to the purpose of the plot.

It is also possible to export already existing series and import series previously imported, which is useful for comparing series made using different projects or simulations.

12.2.3. View Radial Points

This option is available when observation spheres have been set. This plot is used to represent the different values for the Near Field on each radius sample defined in a sphere. Therefore, to make this plot useful, it is suggested to generate an observation sphere that makes use of multiple radius using samples.

Radial Near Field

When this option is selected, the panel previously depicted is shown. The following options are available to the left.

  • Incidence: which kind of near field incidence to add: scatter incidence, direct incidence or total incidence.
  • Component: which field component to inspect, from either the E-field or the H-field, and whether to inspect the X, Y or Z component or the total field.
  • Step: on simulation projects that make use of step, the user can select the step number to add.
  • Frequencies: on simulation projects that make use of multiple frequencies, the user can select one particular frequency to add.
  • Observation points: on simulation projects that make use of multiple observation point structures, the user can select one of the geometries
  • Theta and phi cuts: when multiple observation directions are available, this option is used to select one particular cut.

Press the Add Series button to add the series to the graph.

It is possible to modify already existing series too. The user can set the color for the series, which is useful when multiple series have been added to the plot. Select the series using the List of series control, and press Change colors to modify the color used to render the series. Aditionally, a series can be removed if it's not relevant anymore to the purpose of the plot.

It is also possible to export already existing series and import series previously imported, which is useful for comparing series made using different projects or simulations.

 

12.2.4. View Observation Points By Frequency

This option lets the user analyze the values for the near field through a frequency sweep. To make this section useful, a frequency sweep must have been previously calculated. The user can use this result view to generate plots that compare the values at near field for a particular Observation point in a given component and incidence and step through every frequency.

Near Field - Frequency

The controls on the left let the user add, modify and delete series. Using the visible controls the user can select a series to add using the following settings:

  • Incidence: which kind of near field incidence to add: scatter incidence, direct incidence or total incidence.
  • Field Component: which field component to inspect, from either the E-field or the H-field, and whether to inspect the X, Y or Z component or the total field.
  • Step: on simulation projects that make use of step, the user can select the step number to add.
  • Observation points: on simulation projects that make use of multiple observation point structures, the user can select one of the geometries.
  • Observation Point: the user can select a particular observation point from the list.

Press the Add Series button to add the series to the graph.

It is possible to modify already existing series too. The user can set the color for the series, which is useful when multiple series have been added to the plot. Select the series using the List of series control, and press Change colors to modify the color used to render the series. Aditionally, a series can be removed if it's not relevant anymore to the purpose of the plot.

It is also possible to export already existing series and import series previously imported, which is useful for comparing series made using different projects or simulations.

12.2.5. View Observation Points By Step

This option lets the user analyze the values for the near field through multiple steps. To make this section useful, at least two steps must exist in the project. The user can use this result viwe to generate plots that cmopare the values at near field for a particular Observation point given component, incidence and frequency through every step.

Near Field - Step

 

The controls on the left let the user add, modify and delete series. Using the visible controls the user can select a series to add using the following settings:

  • Incidence: which kind of near field incidence to add: scatter incidence, direct incidence or total incidence.
  • Field Component: which field component to inspect, from either the E-field or the H-field, and whether to inspect the X, Y or Z component or the total field.
  • Frequencies: on simulation projects that make use of multiple frequencies, the user can select one particular frequency to add.
  • Observation points: on simulation projects that make use of multiple observation point structures, the user can select one of the geometries.
  • Observation Point: the user can select a particular observation point from the list.

Press the Add Series button to add the series to the graph.

It is possible to modify already existing series too. The user can set the color for the series, which is useful when multiple series have been added to the plot. Select the series using the List of series control, and press Change colors to modify the color used to render the series. Aditionally, a series can be removed if it's not relevant anymore to the purpose of the plot.

It is also possible to export already existing series and import series previously imported, which is useful for comparing series made using different projects or simulations.

12.2.6. View text files

>This option can be used to view the numerical results for the near field for a particular step and frequency. Select this menu item to display the Near Field Text panel. In this window, it is possible to select a step if more than one step exists, and one of the simulated frequencies. There will only be one frequency available for selection. However, if multiple frequencies are available as part of a frequency sweep simulation, they will be available for selection.

Press the OK button to display the numerical results. It is possible to export these results to a text file by pressing the Export button.

Viewing near field values in text format

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