A directional antenna is one that transmits and
receives power preferentially in a particular direction, in contrast to
the omnidirectional antenna that transmits and receives power equally in
all directions. In other words, the radiation pattern of a
direction antenna is not spherical.
Often, the radiation pattern of a
directional antenna changes with frequency, although directional antennas
may be either narrowband or broadband.
Other topics in our resources on Antennas related to Directional Antenna include: