Directional Antenna, Its Overview And Advantages Over Other Types

By Richard Richardson


This is one kind of an antenna that will radiate power either in one or in a lot of directions. With this, capability, it will generally be allowed on maintaining to increase the performance to transmit and to receive transmissions. Its strength is also being focused and the power is transmitted in only one direction in general, and thus, resulting to an optimized signal strength and minimized signal loss.

Mostly, the antennas may also have the ability to help in the reduction of interference from various sources. And thus, making this directional antenna to be the most ideal and the most popularly used in most areas wherein interference are a lot in number. The most common examples of interference a are the transmitting devices but these would also include weather conditions, microwave ovens, and other obstructions.

There are two very common types of these antennas and these are the corner reflector and the log periodic types. Directional antennas usually are being combined and available for use as antennas for the televisions, specially designed to be used in residential areas. Another common use is as cellular repeaters for receiving and for transmitting signals which are normally out of range in some types of cellular phones.

Antenna directions usually are very important for the set up directional antennas. When there is a wrong direction, the abilities an antenna has can be rendered useless. So it would better for areas to be checked first before starting the installation process. Through this, you can know what type of antenna will be used since you already know the potential sources of obstruction and interference.

The direction to which the device is being pointed is another important factor that you need to consider. This device is said to be very effective if it will be pointed towards the source of the target signal which is very near to it. This signal has the least interference and obstruction amount. This is the very reason why the process of mounting is considered a big issue.

Usually, there are some limitations when it comes to the coverage and this is because one general area has been focused only. In larger areas in which a larger coverage is also needed, the device becomes less effective. Thus, for a larger coverage, omni directional types are being recommended for use instead. Omni types have the ability to transmit and receive signal to several directions.

The best areas for the installation are in outdoors or other open areas such as outside the home. Usually, closed spaces have more obstructions which can generally limit its effectiveness. However, before purchasing these antennas, make sure to consider importantly the advantages and limitations.

Security issue is a very common advantage. These devices help to prevent the wormhole attacks. During the attacks, from attackers, a packet will be forwarded through an out of band link which is in high quality and this packet is replayed to the other locations. And thus, resulting to the disruption of all communications.

And lastly, a very common limitation is deafness that happened when these devices are used. The network performances become limited. Multiple retransmissions can cause the misunderstanding of nodes between the connection because of the mobility and route search has been triggered, and thus, distracting the interactions between the upper layers.




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