JAWUG

These are antennas that have a very focused beam.

They are generally used to connect to one other point.

Great for long distance links!

There are a multitude of Directional Antenna Types:
YagiAntennas
GridAntennas
DishAntennas
FlatPanelAntennas
CircularlyPolarizedAntennas

Check the DirectionalDistances page for a table of Gain vs. Range