WiFi Antenna FAQ
What are common WiFi Antenna FAQs ?
What are the main types of WiFi antennas ?
The two main types of antennas are Omni-Antenna and Sector directional Antenna. Omni directional antennas radiate WiFi signal in a 360 degree pattern and Sector directional antennas 90, 120 & 180 Degree emit the WiFi signal in a focused beam similar to the headlight of a car.
What is a Point-to-Multipoint network ?
A point to multipoint architecture is a communications channel that runs from one point to several other points. For this type of network you would use both Panel Antenna and directional Secter antennas.
What is a Point-to-Point network ?
A point to point architecture is a communications channel that runs from one point to another. Directional antennas would be used in a point to point wireless link.
What is antenna polarity ?
The polarity of an antenna is the orientation of the electric field of the radio wave with respect to the Earth’s surface. Antennas can have vertical polarization, horizontal polarization or both.
What is antenna gain ?
Antenna gain is a relative measure of an antennas ability to direct or concentrate radio frequency energy in a particular direction or pattern. WiFi antenna gain is typically measured in dBi or dBd.
What is 802.11? 802.11 ?
is an IEEE standard for implementing wireless local area network (WLAN) communications in the 2.4, 3.6 and 5 GHz frequency bands. Previously released 802.11 standards include 802.11a, 802.11b, 802.11g, and 802.11n. The latest pre-release standard is 802.11ac which promises wireless speeds over 1 Gbps.
What is dBi ?
dBi are Decibels relative to an isotrope.
What is Frequency ?
Frequency is the number of cycles of alternating current in one second, measured in Hertz (Hz).
802.11 Wireless Standards
*Range estimates are typical and require Line of Sight . Basically that means you will need a clear unobstructed view of the antenna from the remote point in the link. Keep in mind that walls and obstacles will limit your operating range and could even prevent you from establishing a link. Signals generally will not penetrate metal or concrete walls. Trees and leaves are obstructions to 802.11 frequencies so they will partially or entirely block the signal.
Other factors that will reduce range and affect coverage area include metal studs in walls, concrete fiberboard walls, aluminum siding, foil-backed insulation in the walls or under the siding, pipes and electrical wiring, furniture and sources of interference. The primary source of interference in the home will be the microwave oven. Other sources include other wireless equipment, cordless phones, radio transmitters and other electrical equipment.