DIY digital antenna

The main quality indicator of each antenna is its interaction with the etheric signal. This principle of work is the basis of both purchased and homemade antennas. We offer to familiarize yourself with the recommendations on how to make an antenna for digital TV with your own hands.

Table of contents:

1. Features of modern television
2. Simple digital antenna with your own hands: Requirements for the device
3. Antenna for digital TV with your own hands: characteristics of the reception
4. Antenna for digital TV with your own hands: manufacturing technology
5. Essential digital antennas with hands from beer cans
6. DMV antenna for digital television with your own hands

Features of modern television

If we compare the modern television broadcast with the ether that was several years ago, you can find certain differences. First of all, the DMV range is used to transmit television. Thus, it is possible to significantly save funds and receiving a signal of antenna. In addition, in this case, the need for periodic maintenance of the antennas also disappears.

Also, television sensors have become much more than before, so most television channels are available in almost milestones in the country. To ensure television broadcasting in inhabited zones, low -power sensors are used.

In large cities, radio waves spread differently. Due to the large number of multi-storey buildings, the signal through them is supposed to be weakly. In addition, there are a huge number of television channels for which one standard television antenna is not enough.

With the development of digital broadcasting, the reception of channels has become even easier. These types of antennas are resistant to interference, phase or cable distortions, and clarity of the image.

Simple digital antenna with your own hands: Requirements for the device

Since television broadcasting conditions have changed, the rules of operation of modern antennas have changed:

1. One of the main parameters of the television antenna, in the form of a directed action coefficient and protection coefficient, are not particularly important. Various electronic means are used to combat all kinds of interference.

2. The coefficient responsible for strengthening the antennas improves the signal, cleans it of extraneous sounds and various kinds of interference.

3. Another important quality of a modern television antenna is a range. The preservation of electrical parameters is carried out automatically, without additional human intervention.

4. The working value of the television antenna range should interact well with the cable that is connected to the antenna.

5. In order to avoid the appearance of phase distortions, it is necessary to provide decent characteristics of the antenna in an amplitude-frequency ratio.

The characteristic of the last three points is determined by the properties for receiving a television signal using the antenna. A functioning antenna at the same frequency is capable of taking several wave channels. However, in order for them to be agreed with the feeder, it is necessary to have a USS that strongly absorb signals.

Therefore, there are certain options for digital antennas available for manufacturing at home. We offer to familiarize yourself with them:

1. The Vsevolnova version of the antenna, such devices are characterized by frequency dependence, they are cheap, very popular among consumers. One hour is enough to make such an antenna. This antenna is perfect for city apartments, but in the village, which is somewhat remote from television centers, such an antenna will work worse.

2. The speech therapy range of the antenna - such an antenna captures certain signals. It is distinguished by a simple design, well suited for various work ranges, does not change the parameters of the feeder. It differs in average technical parameters, great for country houses, cottages, apartments.

3. The Z-shaped antenna, which is also called zigzag. For the manufacture of such a design, it will take a lot of time and physical effort. It differs in wide receiving characteristics. Using such an antenna, it is possible to expand the range of television channels.

To achieve the exact coordination between the antennas, it is necessary to lay the cable through the value of the zero potential.

Antenna for digital TV with your own hands: characteristics of the reception

Vibraton antennas are capable of finding several more digital on one analogy cantala. Such devices take wave channels. They are rarely used and relevant for places remote from television towers.

Self -manufacture of a satellite antenna is a meaningless process. Since this process will need to purchase a purchased tuner and a head, and mirrors should be very accurate, it is almost impossible to achieve it at home. You can only set up such an antenna yourself, but not its manufacture.

In order to make the above variants of the antenna, it is necessary to understand very well in higher mathematics and electrodynamic processes. Among the main characteristics of the terms used in the process of manufacturing television antennas, we note:

1. KU - the power of the antenna, which is determined in the ratio of the adopted antenna signal to its main petal.

2. The Directorate - the relationship between the bodily circle and the bodily angle of the antenna petals in the presence of different in size of the petals, they change in area.

3. KZD - the relationship between the signal accepted on the main petal and the total amount of the antenna power.

Please note that if the antenna is a range, then the power is taken into account in relation to a useful signal.

Please note that the first two terms are not necessarily interdependent. There are certain options for antennas with a high orientation, however, a single or less amplification. However, in a zigzag antenna, a significant strengthening is compiled with a low level of direction.

Antenna for digital TV with your own hands: manufacturing technology

Each of the elements of the antenna along which a current that makes a useful signal is moving should be connected to another using soldering or welding. Any assembly unit located on the street should be well fixed, since the destruction of electronic contact on the street occurs faster than indoors.

Particular attention should be paid to zero potential. It is in these places that there are voltage units, electric current, with its highest power. For the manufacture of places with zero potential, a whole bent metal is used.

For the manufacture of braids or central core, a coaxial cable made of copper or inexpensive alloy with anti -corrosion properties is used. To solder the cable, a forty plug shackle apparatus is used, with alloy sprouts and flusp.

The external digital antenna with your own hands is made in such a way that all compounds are stable before moisture, temperature changes and other external influences.

For the manufacture of the Vsevolnovaya antenna, two plates of triangular shape, two rails are required, made of wood and enameled wire. At the same time, the size of the wire in the diameter is practically not important, and the interval between their ends is about 2-3 cm. The interval between the plates on which there are the ends of the wire is 1 cm. It can replace two metal plates with a one-sided fiberglass of a square shape with a foil coating. At the same time, copper triangles should be cut out on it.

The antenna in width should be the same as in height. The canvases are open at right angles. In order to lay the cable to this antenna, it is necessary to follow a certain scheme. A cable braid is not soldered to a point indicating zero potential. She is just attached to her.

Chna, which is stretched inside the window by 150 cm, is able to accept most meter and CCM channels of any direction. The advantage of this antenna is that it has a wide range of channels. Therefore, such antennas are popular in large cities where various television centers are present. However, such an antenna has certain disadvantages - ku antennas is a single, and KZD is zero. Therefore, in the presence of large interference, the antenna will be irrelevant.

It is possible to make other types of digital antennas with your own hands with a chna, for example, a logarithmic spiral of two turns. This version of the antenna is compact and it is easier for manufacturing.

Essential digital antennas with hands from beer cans

For the manufacture of a digital antenna with your own hands from the cable, beer banks will be required. This version of the antenna, with the right approach to its manufacture, is characterized by good performance. In addition, such an antenna is quite simple to manufacture.

The principle of operation of such an antenna is based on an increase in the diameter of the shoulders on an ordinary linear vibrator. In this case, the expansion of the working strip occurs, while other properties do not change.

Beer banks in the relationship with their dimensions are used as shoulders on the vibrator. At the same time, the expansion of the shoulders is unlimited. This version of a simple vibrator is used as a room digital antenna with your own hands to receive television broadcasting, connecting directly using a cable.

If you dwell on the assembly option from a beer diopol of a symphaznoy grate located vertically, while the step will be a wave of waves, then it will be possible to improve the value of which antenna. Also, an amplifier from the antenna should be installed on this device, with which the appliance is coordinated and configured.

To strengthen such an antenna, the KZDs are added to it, the screen and mesh installed behind it, with an interval of half the grill. To install the beer antenna, the presence of a dielectric mast is required, while the screen and mast are connected by a mechanical connection.

At the same time, about three, four rows are equipped on the grille. Two lattices are not able to achieve a lot of amplification.

DMV antenna for digital television with your own hands

The logoperiodic version of the antenna is called the antenna -type antenna, which is connected to half on the linear diopol, the interval between them changes, in the relationship with the geometric parameters of the progression. There are configured and free lines. We offer to dwell on a longer and smooth version of the antenna.

For the manufacture of the IP, it is necessary to have any predetermined range. The higher the progression indicators, the greater the amplification the antenna differs. This version of the antenna in operational and technical characteristics is ideal for manufacturing at home.

The main principle of its normal functioning is to carry out the correct calculations. With an increase in progressive indicators, the increase increases and the angle of opening opening decreases. This antenna does not need an additional screen. Since he does not depend on him of his general characteristics.

In the process of calculating the digital ass of the antenna, use the following recommendations:

• The second largest vibrator must have a reserve of frequency power;
• Next, the calculation of the longest diopol is calculated;
• After that, another set frequency range is added.

If the shortest diopol leaves the lines, then it is cut off, since it is necessary on the antenna, only for calculations. The total length of the antenna will be about 40 cm.

The diameter of the lines on the antenna is about 7-16 mm. In this case, the interval between the location of the axes is 40 mm. The cable to the line is not tied by the external method, as this will negatively affect the technical properties of the antenna.

The outer antenna is fixed on the mast using the center of gravity. Otherwise, the antenna will constantly shake under the influence of wind. However, the metal mast is connected to the line not straightforwardly, since this place should be provided with a dielectric mast, the length of which is about 150 cm. A wooden beam, previously painted or covered with varnish, can be used as dielectric material.

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