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Four Types of Omni Directional Antennas

By: Courtney Hamby on June 4th, 2015

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Four Types of Omni Directional Antennas

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Omni Directional Antennas are a class of Antennas that radiate uniform wave power in all directions in a plane. These devices can give out various frequencies of wave power such as 900 MHz Omni Directional Antenna, 900 MHz Omni Directional Antennas etc. The radiation pattern of such Antennas is usually termed as doughnut shaped as it covers all directions in a plane and the frequency starts decreasing with reducing elevation angle. This device of communication is mostly used in radio broadcasting Antennas, mobile devices and walkie-talkies.   

Types

Omni directional Antennas are also used in various wireless network applications to transmit radiated signals and receive such signals simultaneously. Different applications require a variety of such Antennas. The types of Antennas commonly available are-

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  • Rubber Duck Antenna: This one as the name suggest, is a rubber dipole antenna used in most default access and wireless communications such as routers. The device includes a compact build along with a rubber or plastic sheath, which allows the antenna flexibility. New versions of this antenna include plastic sheathing that comprise of a gain between 2 and 2.2 decibel isotropic. 
  • Spider Omni Directional Antenna: The Spider is a simple design among Omni Directional Antennas. This type of Antennas contain a standard N-type chassis mount connector along with short lengths of stiff wire fenced into each corner hole. This Antenna offers a gain up to 3 decibels isotropic.
  • Ceiling Mount Omni Directional Antennas: This design is mostly preferable for an indoor area with an aim of discreet frequency serving. Such antennas have the luxury of being mounted on the ceiling and look similar to lights. These Antennas are often uses as Wi-Fi hotspots where multiple devices can catch frequencies at once without any disturbance. These devices have a 3.5 decibel isotropic gain, meaning it can cover a greater floor space.
  • Outdoor Omni Directional Antennas: Also called as GP Antennas these Antennas can provide a 360 degree area coverage. These devices are also available in weatherproof and waterproof option meant for setting up in outdoor areas. Outdoor Antennas are bigger in width and height in comparison to other Antennas and can gain up to 12 decibel isotropic, meaning a coverage of a colony or society.

Omni Directional wave patterns are created with the help of simple and practical Antennas such as monopole and dipole Antennas that include only one or maximum two straight rods.

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