If you are a person with typically Soviet thinking, then you prefer to rest at your dacha. And for a comfortable stay we need a TV, and an antenna is required to it. I somehow do not want to buy a satellite kit for the sake of several months, and leaving a plate for the winter, there is a chance of not to see it in the spring. But as they say, there is always a way, who has a head and hands. Antenna for the TV with your own hands, is the most optimal solution to your problem.
Wire antener-on works well on 1 - 5th of the meter range. For the first channel, the size of the beam L1 70 cm, and L2 10 cm, the remaining channels -, respectively, 59 and 8, 49 and 7, 43 and 6, 38 and 5 cm.
It consists of two loop and half-wave vibrators. The first of them is the main, the second serves as a reflector. On television, construction is guided by an active - vibrator. Mast and arrow must be made of insulating material.
Dimensions depend on the number of the television channel. The distance between the axes of the opposite sides of the loop vibrator 75 is 80 mm. For the first channel, the length of the loop vibrator 263 cm, the reflector 320 cm, the distance between them is 91 cm.
For other channels 218 - 264 - 76, 175 - 212 - 64, 156 - 190 - 56, 142 - 174 - 50, 76 - 94 - 27, 73 - 90 - 26, 70 - 86 - 24, 67 - 82 - 23 , 65 - 79 - 22, 62 - 76 - 22, 60 - 74 - 21.
This book with theoretical foundations required when designing and developing antennas, with resolved coordination issues, and the necessary descriptions of many structures of various types of short-wave range. The second part of the book located in the same archive contains descriptions of the designs of meter and decimeter ranges, mobile antennas, antenna amplifiers, and a methodology for calculating antenna measurements.
In order for you to connect the antenna to the TV, we will need: an antenna cable of the required length, two adapters of F-Naikatevionic cables RG-6, F-plug
Two large rings called this original name, which in the middle joined the aluminum plate. Today, Cheburashka returned from the past and is excellent for capturing waves not only the decimeter range, but also to receive Wi-Fi signal, especially in rural areas.
We will need two allyumine rings with a diameter of 100 mm outside and 38 mm inside aluminum. Then, in each ring you need to cut a strip with a width of 5 mm. To connect the rings, a glassstolite bar is perfect. Connect rings is required so that both slots are located opposite each other. After that, a pairwise connection of the upper and lower edges of the gap is carried out. At the end of the assembly, it is necessary to stack the screen and the main core of the television cable. When choosing an antenna installation location, remember, the shorter the cable length is before the receiver, the higher the signal level or image quality on the screen.
In principle, the work of "Cheburashka" is the scheme of circular vibrators. The phase difference between symmetricly located rings, provided that the polarization of the waves is carried out in the horizontal plane, does not occur. A cable connected to such a design with a carriage transmits the resulting radiation.
The design of this type has a resonant frequency of 802 MHz, the poeta it fits perfectly for receiving Wi-Fi networks even with a frequency of 900 MHz. The gain of this type of construct is 15DB and it is perfect for the RK-75 coaxial cable.
For normal operation, the correct vertical arrangement of the antenna is required, so that the cuts made are one under the other. The polarization of the resulting signal is carried out in a horizontal plane.
