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Plotting the Current Distribution

3D Plots

To visualize how current flows across your entire model, navigate to Results > Plot Current Distribution in the main menu. This command launches the AN-3D Pattern application, which renders the current amplitude directly on the 3D structure using a dynamic color scale (Fig. 1).

Beyond amplitude, you can also analyze the complex components of the current. By selecting the Plot menu within AN-3D Pattern, you can display:

  • Amplitude
  • Phase
  • Real part
  • Imaginary part
Fig. 1: Current distribution in amplitude as a color map on a Log-Periodic Dipole Array (LPDA) plotted in AN-3D Pattern.

Adjusting the Color Bar in AN-3D Pattern

For precise data interpretation and professional presentations, you can manually override the automatic scaling. This allows you to set specific increments (e.g., multiples of 5).

  • Navigate to Edit > Preferences in the AN-3D Pattern menu (Fig. 2).
  • Manually define the Max and Min values of the color scale to highlight specific ranges of interest.
Adjusting the Color Bar in a 3D Radiation Pattern Plot.
Fig. 2: Color bar scale can be adjusted in the Preferences window of AN-3D Pattern.

2D Plots

If you need to analyze the current along a specific wire in detail, you can generate a Cartesian plot using AN-XY Chart.

Method 1: Quick Access

Right-click directly on a wire in the workspace and select Plot Currents from the pop-up menu (Fig. 3).

Method 2: Toolbar Selection

  1. Click the Select Wire button (arrow icon) on the toolbar.
  2. Left-click the desired wire.
  3. Go to Results > Plot Currents in the main menu.

Within the AN-XY Chart interface, you can toggle between amplitude, phase, and complex parts via the View menu.

Fig. 3: The “Plot Currents” command in the pop-up menu displayed after right-clicking a wire, and the current distribution in amplitude plotted in AN-XY Chart.

Tips

To optimize your analysis of 2D current distributions, AN-XY Chart provides several interactive navigation and data management features:

  • Zooming: To focus on a specific area of the plot, press and hold the left mouse button while expanding a box over the desired region.
  • Panning: To move the view without changing the zoom level, right-click on the graph and drag the mouse.
  • Reset View: To quickly return to the original full-scale view, left-click and expand a small rectangle in an upward direction anywhere on the plot.
  • Units and Export: The main menu offers options to change the units of the plotted magnitudes (e.g., from linear to dB). You can also export the data to external formats for further processing in third-party software.
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