GTD 6.3

7.1. Dipole

The "Dipole" menu item contains two options to add dipole antennas to the current simulation. The user may add an individual dipole antenna or a array of dipole antennas. The "Dipole Array" option allows the user to add multiple dipole antennas that will be simulated together. This allows the results to be calculated for the group of antennas as a whole, and not for individual antennas (this is useful when calculating coupling results between groups of antennas).

Dipole menu

Figure: Dipole menu options

7.1.1. Dipole Antenna

The "Dipole Antenna" option allows the user to add an individual dipole to the simulation. When the option is selected, the following panel will be shown:


Add Dipole Antenna panel


In this panel, the user can set:

  • Set dipoles: the user can set the number of magnetic and electric dipoles. When setting the number of dipoles of each type we can press the Position button to adjust their properties. First of all, we need to select the dipole we want to modify by selecting from in the combo box at the top and editing its properties:
    • Dipolar moment: magnitude and phase of the dipolar moment.
    • Positon - Coords: location of the dipole.
    • Orientation - Director cosines: orientation of the dipole coordinate system.

Dipole settings window


  • Components: the amplitude and phase of the antenna.
  • Position - Coordslocation of the antenna (X, Y and Z).
  • Orientation - Director cosines: orientation of the antenna coordinate system related to the absolute coordinate system.
  • Relative to referencePlane: if this check box is selected, the position of the dipole is relative to the reference plane.




7.1.2. Dipole Array

This option allows the user to add an array of dipole antennas to the simulation. When the user selects this option in the menu, the following panel will appear:

Dipole array panel

Figure: Dipole array panel

In this panel, the user can specify the parameters of each dipole in the same way as in the "Dipole Antenna" panel (as described in the previous section). Additionally, the user can specify parameters regarding the creation of the array:

  • The point specified in the "Array center" panel is the point where the array center will be located. By checking the "Pick" checkbox, the user can pick the desired point in the geometry panel and the textboxes will be automatically filled with the point coordinates.
  • The "Array parameters" panel contains the values that will determine the number of antennas created along each axis (Number of Elements X, Number of Elements Y and Number of Elements Z), as well as the separations between each adjacent antenna along each axis (Tx, Ty and Tz).
  • The "Array orientation" panel allows the user to specify the directions of the axes considered when creating the array. By default, the array axes are the same as the absolute X, Y and Z axes when the "Relative to reference plane" option is selected.

If the "Relative to reference plane" checkbox is selected, the axes given in the "Array orientation" panel, as well as the point given in the "Array center" panel will be transformed according to the current reference plane coordinate system.

After specifying the parameters, the user needs to click on the "Create Array" button for the array of dipoles to be added to the simulation.

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