An administrator wants to establish a WiFi network using a high gain directional antenna with a
narrow radiation pattern to connect two buildings separated by a very long distance. Which of the
following antennas would be BEST for this situation?

A.
Dipole

B.
Yagi

C.
Sector

D.
Omni

Explanation:
A Yagi-Uda antenna, commonly known simply as a Yagi antenna, is a directional antenna
consisting of multiple parallel dipole elements in a line, usually made of metal rods. It consists of a
single driven element connected to the transmitter or receiver with a transmission line, and
additional parasitic elements: a so-called reflector and one or more directors. The reflector
element is slightly longer than the driven dipole, whereas the directors are a little shorter. This
design achieves a very substantial increase in the antenna’s directionality and gain compared to a
simple dipole.