Directional Antennas

A directional antenna provides high gain in the forward direction, but lower gain in other directions. This type of

antenna may be used to compensate for coaxial cable loss for installations with marginal radio path. Directional

antennas can be any of the following:

• Yagi antenna with a main beam and orthogonal elements

• Directional radome, which is cylindrical in shape

• Parabolic antenna

Yagi antennas should be installed with the main beam horizontal, pointing in the forward direction. If the Yagi

antenna is transmitting to a vertically mounted omni-directional antenna, the Yagi elements should be vertical. If

the Yagi is transmitting to another Yagi, the elements at each end of the wireless link need to be in the same plane

(horizontal or vertical).

Directional radomes should be installed with the central beam horizontal, and must be pointed exactly in the

direction of transmission to benefit from the gain of the antenna.