        AN-SOF ANTENNA SIMULATOR
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Parabolic reflector antenna (dish antenna).

The reflector is modeled by a grid of curved segments. The hole sizes are small compared to the wavelength near the center of the parabola, buy they aproach half-wavelength away from the center. Most real parabolic antennas are built in this way, so this is a good approximation in those cases. The curved segments are a better approximation than straight segments when a continuous metallic dish surface is used as a reflector. 

A three-elements Yagi antenna is located at the focus point of the parabola and its radiation pattern is pointing towards the reflector (secondary radiator). This Yagi antenna then simulates a primary radiator.

A high gain is obtained as can be seen by plotting the radiation pattern, which shows a main lobe pointing towards the parabola axis (y-axis). 