Offset antenna - the best TV channels in excellent quality
The modern world is characterized by the development ofinformation technology at a rapid pace. Therefore, the means of information transfer are also significantly improved. After all, they should provide higher quality and speed of data processing. One of these areas, widely received, was satellite communications. It is used in many areas of human activity: from large industrial developments to small households.
One such development is satelliteTV. It is now very difficult to find at least one apartment building in which at least a few satellite dishes would not have been installed. This is not surprising, because for a small fee you can get excellent quality of broadcasting of television channels from around the world.
There are two main types of these devices: direct focus and offset antenna. The main difference between them lies in the location of the received signal. Also, the dimensions of a parabolic dish are not the same. So, the offset antenna has small dimensions, and the point of placement of the converter (reflected in it) is shifted relative to the geometric axis. For the direct-focus antenna, large dimensions and, correspondingly, reflection into a point located on the geometric axis are characteristic.
Offset antenna works by the principle of reflectionsignal from the full-face part of the parabola to the converter. Only part of the entire branch of the parabola is used. The large offset dish has a full-face view of the egg, those that are smaller - a circle. Large devices include those having a minimum diameter of more than one meter. To small - less than one hundred centimeters.
But it should be noted that the offset antenna can not be used to receive a professional television signal. This is due to the fact that when reflected on the converter an uneven spot forms.
To install offset satellite dishes,it does not take a lot of time and energy, since fixing these devices should be practically vertical, and this greatly simplifies their attachment to the balcony or simply to the wall of the house.
Offset antennas can be made from differentmaterial: plastic, steel, mesh, aluminum - all this can become the basis for the production of a reflective surface. Each of these devices has its own disadvantages and advantages. So, for example, antennas made of plastic are strongly influenced by temperatures, but much lighter in weight and more convenient to install. Steel, on the contrary, is heavier, but much stronger and more reliable. Although the antennas of this material have one property that adversely affects reception - they will eventually rust.
The modern market will provide you with a wide range of goods, so you can always choose exactly what is suitable in a particular case.
</ p>
