WiFi-directional antenna: description and purpose of the device

Wi-Fi antenna is used to increase the distancetransmit and receive wireless internet connection signals. Such devices are divided into two types: directional and omnidirectional. The choice depends on the task to be solved. The external WiFi antenna (directional) concentrates the signal that is received or transmitted into the narrowest possible beam. As a result, the power and, accordingly, the range of reception or transmission increase.

Wi-Fi application

WiFi directional antenna is great fornetworking point-to-point. Consider in detail how they are created. When one WiFi-directional antenna is installed in the coverage area, then you can put the second such device on the reverse side. This creates a kind of bridge with a high signal level. For the organization of such networks can be used and omni-directional devices. However, the transmission distance is lost, and more antennas will be needed. The ideal combination is a mixed system when using both types of transceivers.

WiFi-directional antenna: characteristics that affect the operation of the device

The range depends on the following factors:

1. Power transmitting device. This parameter is usually measured in decibels. The larger it is, the more powerful the antenna.
2. Length of cable. The shorter it is, the better: there will be fewer obstacles in the path of the signal.
3. Interference, foreign objects.Significant influence on the passage of a signal can have a building, walls, metal structures and even trees. Therefore, when creating such systems, it is necessary to build a network around these obstacles. In ideal cases, that is, under conditions of direct visibility, the signal range can reach 10 km. If it is not possible to build a wireless network without obstacles, then the range of one directional antenna can be reduced to an average of 1.5 km.

Additional information about devices

WiFi-directional antenna has a spray areasignal up to 60 degrees from the transmission line. However, wave channel devices have the most narrowed beam and a spray area of ​​30 degrees. The range is up to 10 km; however, subject to the use of shielding grids, this parameter may be increased.

How to make a Wi-Fi antenna with your own hands

Despite the fact that the stores representeda huge selection of different antennas, many hams prefer to make such devices on their own. Especially since the homemade directional WiFi antenna is made elementary. To do this, you need to pick up a tin can, for example, from under coffee or paint, the diameter of which is 7.5-10 cm, and height - 13.5 cm. In addition, you need a copper wire (diameter - 2 mm, length - 3-4 cm) and a connector (N-type jack) for connecting to a signal source. The wire is soldered to the central contact - it will be a waveguide. It is fastened inside the can, which plays the role of the screening grid. This capacitance helps to narrow the signal beam, the strength of which will depend on the direction. So the bank needs to be deployed exactly at the source.