*3.2.5 Directional antennas*

Transmitting or receiving signals with one or more directions at a time with greater power is done with directional antennas. This technique improves the performance with respect to throughput by increasing the transmission range. With the help of directional antennas, bandwidth reusability is also possible. However, transmission power calculations and optimal antenna pattern selection overhead is more in these directional antennas. Also, directional antennas are more exposed to hidden and exposed terminal problems.
