The List Currents Toolbar

The List Currents toolbar provides a localized view of electrical data for specific points on your model, allowing for detailed frequency-response analysis.

Accessing the Toolbar

There are two primary ways to access this tool:

• Right-Click Menu: Right-click directly on a wire in the workspace and select the List Currents command from the pop-up menu.
• Main Menu: Click the Select Wire button (arrow icon) on the toolbar, left-click the desired wire, and navigate to Results > List Currents. This option becomes available once the current distribution calculation is complete.

Key Functionalities

The toolbar enables you to pinpoint a specific segment within the selected wire to analyze the following data versus frequency:

• Current Analysis: View the current magnitude and phase for any individual segment.
• Source and Load Data: If the selected segment contains a source or load, the toolbar can display a comprehensive list of parameters:
  • Input Impedance
  • Voltages and Power levels
  • Reflection Coefficient and VSWR
  • Return and Transmission Losses

Components of the List Currents Toolbar

The List Currents toolbar provides specific controls to navigate wire segments and analyze their electrical properties across the frequency sweep (Fig. 1).

Navigation Controls

• Slider: Move the slider to select a specific segment along the wire. Each position corresponds to a segment index.
  • Segment Number: Displays the index of the currently selected segment.
  • Segment Position %: Shows the relative position from the wire’s start to the segment midpoint. It is calculated as:
    • $\displaystyle \text{Segment Position \%} = 100 \times \left( \frac{\text{segment position}}{\text{wire length}} \right)$
• 50% Button: Instantly moves the slider to the exact midpoint of the wire. This is particularly useful for verifying or placing center-fed sources and loads.

⚠️ Note: The wire must have an odd number of segments for an exact center segment to exist.

Data and Analysis Buttons

• Current on Segment: Opens a dialog box showing a frequency list of the current for the active segment. Click Plot to generate a frequency-domain graph of the current (Fig. 2).
• Input List: Enabled only if the selected segment contains a source. This dialog displays input impedance, currents, voltages, and powers (Fig. 3).
  • Plot: Graph the selected parameter vs. frequency.
  • Smith: Visualize input impedance on a Smith Chart.
  • Export: Save the data as a CSV file.
• Source List: Enabled when a source is present. It lists currents, voltages, and powers specifically within the internal impedance of the source. Data can be plotted or exported to CSV (Fig. 4).
• Load List: Enabled if the segment contains a load. It displays load impedances, currents, voltages, and powers. Like the other lists, these values can be plotted against frequency or exported (Fig. 5).
• Exit Button: Closes the toolbar and returns to the standard workspace view.