![]() ![]() This places the Hertzian dipole at the focus of the paraboloid on the X-axis. For this project, replace the numeric value of the X-coordinate of dipole source with the name of the variable "focal_len" as shown in the figure below. The length of the short dipole source is initially set to 0.001λ 0. The default unit vector is uX = uY = 0, uZ = 1. You can also specify the unit vector along the dipole by its coordinates uX, uY and uZ. ![]() The total radiated power by the dipole source is shown in Watts. In the source dialog, you can change the coordinates of the dipole center, or its length in project units, its amplitude in Amperes and its phase in degrees. A short dipole source is indeed a filament current source. By default, a +Z-directed short dipole radiator is placed at the origin of coordinates (0, 0, 0). To define a short dipole source, right-click on the Hertzian Short Dipoles in the Sources section of the navigation tree and select Insert New Source. In the context of Physical Optics, a short dipole radiates in all directions and illuminates the triangular cells of the physical structure's surface mesh. This is a small Hertzian dipole antenna of infinitesimal length that has an almost omni-directional radiation pattern. In this lesson, you will use another type of source: a short dipole radiator. In the previous tutorial lessons you used a plane wave source to excite your physical structure. The distance tool dialog showing the measured length. ![]()
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