    AN-SOF ANTENNA SIMULATOR
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This model comprises a resonant dipole that is nearly half a wavelength long. The dipole is positioned horizontally, approximately at a height of half a wavelength from a lossy ground plane. It is centrally fed through a 50 Ohm transmission line, representing a coaxial cable, which connects to a voltage source near ground level.

The model could have been completed at this point, including the source, transmission line, and dipole. However, a vertical wire has been added to represent the outer surface of the coaxial cable shield. This addition exemplifies a hybrid model of a coaxial transmission line, where the interior of the line is implicitly modeled (since it doesn't radiate), while the exterior of the shield is explicitly represented by a metallic wire. The diameter of this wire aligns with that of the cable shield. This approach allows for accounting the radiation effect of the current flowing outside the shielding of the coaxial cable, which may cause RF interference in the vicinity of this antenna. The input power for this model has been set at 100 W.

By plotting the current in the vertical wire, it can be verified that the current reaches its peak value of 127 mA in the middle of the wire. The distribution of the current follows a nearly sinusoidal pattern, as expected for a half-wave wire.

