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In the example above an Omni directional antenna is providing wireless connectivity for laptops, tablets, and smart phones in the coverage area.
Directional Antennas
A directional antenna, as the name implies, focuses the wireless signal in a specific direction resulting in a limited
coverage area. An analogy for the radiation pattern would be how a vehicle head light illuminates the road. Examples of
directional antennas include Yagi, Parabolic grid, patch, and panel antenna styles. High gain directional antennas can
transmit and receive wireless signals for several miles given clear line of sight and sufficient transmit power. (More on
line of site on page 5). Applications for directional antennas include point to point wireless links connecting buildings, a
back-haul data link connecting cell towers together and point to multi-point wireless links where multiple remote clients
with directional antennas communicate with a single central tower with an Omni directional antenna.
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Typical Directional Antenna Radiation Pattern (
)
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