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Focal point



         


A focal point may mean the same as focus.

Elements of an antenna:

  1. driven element
  2. parasitic element.

The driven element is directly connected to the transmission line or source.

In mathematics, focal point has a meaning of a critical point of a distance function.

In terms of light and optics, the focal point is the point in which all the rays of light meet after passing through a convex lens.





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