The benefits that a satellite dish brings to its owner have led to the great popularity of satellite television. Indeed, thanks to the widest choice of channels, you can not only get access to a huge number of films, your favorite sports and cultural programs, but also be aware of all the important events, enhance your knowledge of a foreign language, that is, combine a pleasant pastime with useful self-education. And if you add here still excellent image and sound quality, it becomes clear why the satellite dish is of such interest to those who are only thinking about which TV to install in a new apartment or who are tired of constant interference when receiving a signal.
How does a satellite dish work?
The principle of operation of all plates is approximately the same. First, the signal hits the mirror surface of the satellite dish. Then it is reflected and sent to the converter, from where it in turn gets to the receiver, and from it it goes directly to the TV itself.
A satellite dish can be one of two types: offset or direct focus. The offset antenna is sent not exactly to the satellite, but just below it, because the signal that is reflected from its surface enters the converter at a certain angle. This type of receiving device is mounted almost vertically, which avoids the accumulation of precipitation, which greatly degrade the reception quality. It is such an antenna that can most often be seen at the windows of apartment buildings, since it is convenient to install along the walls. The optimal size of this plate is 1.5-1.8 m.
In the direct focus device, part of the mirror surface is closed by the converter, however, as the diagonal increases, this becomes invisible. The quality of reception depends on the size. Good characteristics start from 1.5 m. With such plate sizes, the irradiator no longer “obscures” the surface of the mirror. This type of antenna is used for professional reception.
It should be noted that the satellite dish is very "picky" to the area. Any interference in the signal path, be it a tree or a wall, can completely or partially “block the reception”. Therefore, before a possible purchase, you need to check whether there is interference in the direction from the proposed installation location to the selected satellite.
Do-it-
yourself satellite
dish. Is it worth a try?
If you type in a Google search “homemade satellite dish”, the Internet will produce the most bizarre pictures with images of such amazing designs that you sometimes admire the boundless imagination of a person. There are beer cans, and umbrellas, and steel wire frames , and cut galvanized sheets , etc. Will any of this work? Maybe. However, it is unlikely that such a design can compare with a regular plate, which can be easily purchased at any specialized store. Considering the fact that the average price of satellite dishes is quite affordable, there is no need to spend your time building a dubious construction, except, perhaps, if a person is an inventor by nature or has deep knowledge in this area.