Wireless Antennas

Wireless Antenna - device designed to send and recive radio frequency signals.

omnidirectional antennna - desogned to transmit and recive wireless signals in all directions equally. default type for devices and wirells access points.

unidirectional antenas focuses on a sindle direction to privide a more concentraded signal beam. like if you wnat to reach two buildings together. can be used to make a wireless point to point network. good for long and narrow coverage areas or a strong signal in one articual directions.

Yagi Antennna - specefic type of diretional antenna that can provide high signal gains and use narrow beamwidth. best if you need to capture signal or send signals over a long distance.

Selecting the right antenna ensures the network delivers storn gan dreiable connectiviyt tailored to the users needs.

Wireless Antennas (N10-009)

Definition

Device designed to send and receive radio frequency (RF) signals.
Antenna choice affects coverage area, strength, and reliability.

Omnidirectional Antenna

Default type for Wi-Fi devices & APs.
Radiates signal equally in all directions (360°).
Best for: General coverage in homes/offices.
Exam Tip: Think "AP in the middle of the room → coverage everywhere."

Unidirectional Antenna

Focuses signal in one direction → stronger beam, longer range.
Useful for point-to-point links or long, narrow coverage (hallways, building-to-building).
Example: Two offices across the street connecting wirelessly.

Yagi Antenna

A specific type of directional antenna.
Provides high gain and narrow beamwidth.
Ideal for long-distance connections where precise targeting is needed.
Common use: Rural areas, outdoor point-to-point links.

✅ Must-Know Associations:

Omni = all directions, default.
Uni = one direction, point-to-point.
Yagi = high-gain directional, long distance.

⚡ Quick Flashcards:

Q: Which antenna type does a standard AP use by default?

A: Omnidirectional.
Q: Which antenna is best for connecting two buildings across the street?

A: Unidirectional (Yagi if long distance).
Q: What does "gain" in an antenna refer to?

A: Stronger signal focus in a given direction.

Cell phones use omnidirectional some antennas allow to connect a different antenna.

Wireless card and omni directional, and use an antenna. used in pen testing.

parabolic are special type of unidirectional giveas a diffeent type of look. looks like a statliet disk