The decimeter range refers to the broadcasting frequencies of television, including digital. Some segment antennas are simple, others are complex. The purpose of the aggregates is to receive horizontal polarization from the towers. Today we will consider how the UHF antenna is made with our own hands.

Simple antenna design with a center frequency of 500 MHz

The UHF antenna, described by the magazine Radio No. 3, 1991, has been mutilated more than once, today they decided to resurrect the product so that readers can use it. The scheme of a partial zigzag has been completed. It is paired with a converter, it is intended to receive UHF to the meter input of the TV. Those who remember Soviet technology know that there are two sockets on the back of the TV. The decimeter range was not used by the state. Regional channels were broadcasting.

We make a square frame from a 75-ohm cable with a side equal to a quarter wavelength. We take 500 MHz - we get 12.5 cm. The frame is attached with one corner downward on the basis of the dielectric material:

  • The upper corner of the cable is stripped. The insulation is removed, the screen is 10 mm long.
  • In the lower corner, the wire is taken with a margin of a couple of centimeters. Insulation is removed from the excess areas, then the screens are soldered, forming an electrical contact. The inner core just hangs in the air.
  • The antenna is fastened to the base with tinned wire 1 mm in diameter. It additionally enhances the contact between the screens in the lower corner.
  • Otherwise, a square is obtained, standing on one corner, which is attached to the base.

The corners of the square are slightly smoothed. Guide the fastening with the wire brackets in place, forming a sturdy structure. You can vary the length of the side of the square according to your needs. Tune the resonance to the TV broadcast frequency. If necessary, a screen is hung at a distance of 10 cm from the back side of the plate at a distance of 10 cm. In total, up to the antenna it gives almost the side of the square, equal to 12.5 cm. The distances are chosen depending on the wavelength.

The reflector screen is fixed with four posts, has a width of 330 mm, a height of 200 mm. The center of symmetry coincides with the construction axis of the antenna. Allows you to receive from one direction, eliminates some of the interference. The step is useful if there is a multipath effect. At the same time, the introduction of the screen approximately doubles the antenna gain. The converter looks out of place today. The UHF antenna amplifier is useful if the signal is weak, the tower is far away.

It is easy to see: the design is bulky. The 75 Ohm cable is designed for Soviet technology. The generally accepted television standard. Today, devices are powered by a 50 Ohm cable. Therefore, before making a UHF antenna, you need to find it. If you can make an amplifier in addition, good! You will get an active UHF antenna.

The simplest design of a UHF antenna

It is much easier to use a coaxial cable by creating a quarter-wave vibrator. We find the frequency of reception. The first Moscow multiplex uses 559.25 MHz, from here we calculate the wavelength.

This means that we will clean up by 13.4 cm. The resistance of the quarter-wave vibrator is close to 40 ohms. We take into account the fact, when agreeing, we simply stick it into a digital television receiver, having previously attached an f-connector or another necessary connector. We clean only the outer shell, the screen. Place the quarter-wave vibrator horizontally for better reception. The construction will be assembled by schoolchildren who have found 20 rubles for a wire, a knife, a connector. The simplest do-it-yourself UHF antenna, for comparison, for a purchased one they ask for an order of magnitude more wooden ones.

Don't expect big feats, avoid being dragged to the roof. Not an outdoor UHF antenna. With a guarantee, it will enhance the reception of a conventional receiver. No time to tinker - try the easy way.

UHF antenna - 855 MHz

The size of the antenna must correspond to the 69th channel of Eastern Europe, Russia is also included. Video is broadcast at 855.25 MHz, audio - 861.75 MHz. As far as you can tell, the loop is tuned to 857 MHz. For manufacturing, you will need a hefty piece of wire with a characteristic impedance of 75 ohms. From 53 cm we make a ring with a gap, from where we will shoot the signal. Please note: the screen is signal. Attach the matching U-elbow of a 75 Ohm half-wave 175 mm cable.

It is done as follows:

  • one end of the inner core of the U-bend is mounted on the signal wire, the cable going to the receiver, also on one side of the antenna screen;
  • the second end of the inner core of the U-bend is fitted to the opposite end of the antenna shield.

As a result, the added line segment equalizes the resistance of the round loop and the cable going to the receiver. In order for the device to turn out an antenna for digital television UHF, you need to tune to the frequency of the multiplex. The procedure will be explained thoroughly:

  1. The length of the U-bend is equal to half the wavelength of the multiplex.
  2. The diameter of the frame is equal to a quarter wave of the multiplex.

The wavelength of the multiplex can be found on the Internet, local newspapers. To accept vertical polarization, rotate the bezel 90 degrees with a break to the side. You will be able to pick up the signal of the walkie-talkies. The simplest outdoor UHF antennas.

All-wave antenna DMV-MV

The MV-UHF antenna gives low gain, covering channels 1-41 with a few exceptions. The design is a parallel connection of the “wave channel” of the decimeter range and the star vibrator of the meter.

The total length of the device is 64.7 cm. Let's start with the front edge! In the decimeter part there are 5 directors, one double reflector. If we count from the front, they have a length and distance from each other:

  1. Length 19.9 cm - zero distance from the leading edge.
  2. Length 20.2 cm - distance from the first director 13.9 cm.
  3. Length 20.4 cm - distance from the second director 13.2 cm.
  4. Length 21.2 cm - distance from the third director 6.3 cm.
  5. Length 31.4 cm - distance from the fourth director 2.2 cm.
  6. The reflector length is 34.9 cm - the distance from the fifth director is 7.7 cm.

Please note: the reflector consists of two wires, one above the other with a jumper, the middle of the UHF antenna sitting on the central axis of the TV antenna. The height of the jumper is 10 cm. The fifth director is an elongated oval frame, the upper turn of which in the center is attached to the antenna axis. The open part of the fifth director will serve for parallel connection of the meter part, which is mounted vertically at the rear of the antenna.

The meter part consists of 6 rays, broken along the vertical axis of symmetry. One is horizontal. The beams are based in three pieces on the elements of a two-wire line 5 cm wide. When viewed from above, they are bent mirrored forward. The angle between the beams is 120 degrees. Seen from the front, a regular six-pointed star is obtained with an angular distance between the rods of 60 degrees. The length of each is 108 cm. A two-wire line with a total length of 91.5 cm, going straight to the 5th director (lower open loop), will serve to connect the structure, with the center sitting on the axis of the antenna.

The line goes 11 cm farther than the star up. The part goes in a semicircle, starting at the 5th director, ending at the star vertically. At a distance of 11 cm, now in the direction of the director there are two desoldering points of the 75 Ohm coaxial cable going to the TV. The segments from the point of the two-wire line to the star and the 5th director are chosen so that the waves of the bands do not mix. Meter meters easily pass from the star to the cable, they do not go to the decimeter part, on the contrary, from the 5th director the resistance is small for high frequencies, insurmountable for long ones.

TV antennas DMV-MV are made of a material that provides the required strength characteristics. The central core of the cable is planted on one wire of the two-wire line, the screen on the other. A matching device is added if necessary. It is difficult to use the U-knee, the ranges are different, the author of the invention writes: there are no special power reflections.

Other antennas of the UHF range

Antenna UHF log-periodic is a broadband device. Catches the entire range. It resembles a wave channel configuration, differs in that the directors are located according to a different mathematical law, which gave the name to the design of the UHF antenna. We outline the directors with a triangle. UHF antenna Delta H111-01 is made in a similar way. Providing broadband.

An antenna for a UHF with your own hands is made from improvised material, many metal objects can be adapted. These constructions are part of all schemes; highly specialized devices work best today. Digital multiplexes occupy one frequency at all. TV antennas DMV-MV are becoming unnecessary.

We wish good luck to radio amateurs, Fortune's help will be needed, given the absurdity of articles on the topic of construction. We do not pretend to be perfect, but at least we try!

The main indicator of the quality of each antenna is its interaction with the broadcast signal. This principle of operation is at the heart of both purchased and homemade antennas. We suggest that you familiarize yourself with the recommendations on how to make an antenna for a digital TV with your own hands.

Features of modern television

If we compare the modern television broadcast with the broadcast that was several years ago, then we can find certain differences. First of all, the UHF range is used to transmit television broadcasting. Thus, it is possible to significantly save money and signal reception by the antenna. In addition, in this case, the need for periodic maintenance of the antennas also disappears.

Also, there are much more television sensors than before, so most TV channels are available in almost all parts of the country. To provide television broadcasting in habitable areas, low-power sensors are used.

In big cities, however, radio waves propagate differently. Due to the large number of multi-storey buildings, the signal through them is weak. 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, receiving channels has become even easier. These types of antennas are resistant to interference, phase or cable distortion, image clarity.

Do-it-yourself simple digital antenna: device requirements

Since the broadcasting conditions have changed, the rules for operating modern antennas have changed:

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

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

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

4. The working value of the TV antenna range should work well with the cable that connects to the antenna.

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

The characteristics of the last three points are determined by the properties of receiving a television signal using an antenna. An antenna operating at one frequency is capable of receiving several wave channels. However, in order for them to be matched with the feeder, it is necessary to have ultrasonic systems that strongly absorb signals.

Therefore, there are certain types of digital antennas available for home making. We suggest that you familiarize yourself with them:

1. All-wave version of the antenna, such devices are frequency independent, they are cheap, very popular among consumers. One hour is enough to make such an antenna. Such an antenna is perfect for city apartments, but in a village that is somewhat distant from television centers, such an antenna will work worse.

2. Speech therapy range version of the antenna - such an antenna picks up certain signals. It has a simple design, is well suited for various operating ranges, and does not change the parameters of the feeder. Differs in average technical parameters, great for country houses, summer cottages, apartments.

3. Z-shaped antenna, which is also called a zigzag antenna. It will take a lot of time and physical effort to make such a structure. Differs in wide receiving characteristics. With the help of such an antenna, it is possible to expand the range of reception of television channels.

To achieve an accurate match between the antennas, it is necessary to lay the cable through the zero potential value.

Antenna for digital TV do it yourself: reception characteristics

Vibratonic antennas are able to find several more digital ones on one analog channel. Such devices receive wave channels. They are rarely used and are relevant for places remote from television towers.

Making your own satellite dish is a pointless process. Since in this process you will need to purchase a purchased tuner and a head, and the setting of the mirrors must be very accurate, it is almost impossible to achieve it at home. You can only set up such an antenna on your own, but not make it.

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

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

2. KND - the relationship between the solid circle and the solid angle of the antenna lobes. In the presence of lobes of different sizes, they vary in area.

3. CPV - the ratio between the signal received on the main lobe and the total amount of antenna power.

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

Note that the first two terms are not necessarily interdependent. There are certain antenna options that have high directivity, but gain unity or less. However, for a zigzag antenna, significant gain is combined with a low directivity level.

Antenna for digital TV do it yourself: manufacturing technology

Each of the elements of the antenna, through which a current flows that supplies a useful signal, must be connected to the other by soldering or welding. Any assembly unit located on the street must 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 the nodes of voltage, electric current, at its highest power are located. One-piece bent metal is used for the production of potential-free places.

For the manufacture of the braid or center conductor, a coaxial cable made of copper or an inexpensive alloy with anti-corrosion properties is used. For soldering the cable, a forty-volt soldering machine is used, with low-melting solders and flux paste.

An outdoor digital antenna with your own hands is made in such a way that all connections are resistant to moisture, temperature changes and other environmental influences.

To make an all-wave antenna, you will need two triangular plates, two slats, made of wood and enameled wire. At the same time, the size of the wire in diameter is practically not important, and the interval between their ends is about 2-3 cm.The interval between the plates on which the ends of the wire are located is 1 cm. One-sided square-shaped glass fiber laminate with a foil coating can replace two metal plates. At the same time, copper triangles should be cut on it.

The antenna width should be the same as the height. The canvases open at right angles. In order to lay the cable to this antenna, you must follow a certain pattern. The cable sheath is not soldered to the point indicating zero potential. She just becomes attached to her.

CHNA, which stretches 150 cm inside the window, is capable of receiving most meter and DCM channels in any direction. The advantage of this antenna is that it has a wide channel reception interval. Therefore, such antennas are popular in large cities where various television centers are present. However, such an antenna has certain drawbacks - the antenna gain is single, and the QSP is zero. Therefore, if there is a lot of interference, the antenna will be irrelevant.

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

Essential digital antennas with hands from beer cans

To make a digital antenna with your own hands from a cable, you will need beer cans. This version of the antenna, with the right approach to its manufacture, has good performance characteristics. In addition, such an antenna is quite simple to manufacture.

The principle of operation of such an antenna is based on increasing the diameter of the arms on a conventional linear vibrator. In this case, the working band expands, while other properties do not change.

Beer cans, in relation to their size, are used as arms on the vibrator. At the same time, the expansion of the shoulders is unlimited. This version of a simple vibrator is used as a do-it-yourself digital indoor antenna for receiving television broadcasts by connecting directly with a cable.

If we focus on the option of assembling a vertically arranged in-phase lattice from a beer diopole, while the step will be half a wave, then it will be possible to improve the value of the antenna gain. Also, an amplifier from the antenna must be installed on this device, with the help of which the device is coordinated and configured.

To amplify such an antenna, CPD are added to it, a screen and a grid installed on the back of it, with an interval of half the grid. For the installation of a beer antenna, a dielectric mast will be required, while the screen and the mast are mechanically connected.

At the same time, about three or four rows are arranged on the lattice. The two gratings are not capable of achieving high gain.

Diy UHF antenna for digital television

The log-periodic version of the antenna is called an antenna of a modular type, which is connected to the halves on a linear diopole, the interval between them changes, in relation to the geometric parameters of the progression. There are configured and idle lines. We suggest dwelling on a longer and smoother version of the antenna.

For the manufacture of LPA, any predetermined range is required. The higher the progression rates, the more gain the antenna has. This version of the antenna in terms of operational and technical characteristics is ideal for making at home.

The main principle of its normal functioning is to carry out correct calculations. With an increase in progression indicators, the gain increases and the aperture angle decreases. This antenna does not need an additional shield. Since it does not depend on its general characteristics.

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

  • the second longest vibrator must have a frequency power reserve;
  • then the calculation of the longest diopole is made;
  • then another preset frequency range is added.

If the shortest diode leaves lines, then it is cut off, since it is needed 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 arrangement of the axes is 40 mm. The cable is not tied to the line by an external method, as this will negatively affect the technical properties of the antenna.

The outdoor antenna is fixed to the mast with a center of gravity. Otherwise, the antenna will constantly shake under the influence of the wind. However, the metal mast is not connected to the line in a straight line, since a dielectric mast must be provided at this place, the length of which is about 150 cm. As a dielectric material, you can use a wooden beam previously painted or varnished.

DIY digital antenna video:

In the days of huge tube TVs, a good antenna for high-quality analog TV reception was in short supply. Those that could be bought in stores were not of high quality. Therefore, people made UHF television antennas with their own hands. Today, many are interested in homemade devices. And even when digital technologies are all too common, this interest does not fade away.

The digital era

This era also touched on television. Today, T2 broadcasting is developing especially widely. It has its own characteristics. In those places where the signal level is slightly higher than the interference, a sufficiently high-quality reception is obtained. There is simply no further signal. The digital signal does not care about interference, however, in a situation of cable mismatch or various phase distortions, almost anywhere in the transmitting or receiving path, the picture can be squares even with a strong signal level.

Other changes have taken place in modern television. So, all broadcasting is carried out in the UHF range, the transmitters have good coverage. The conditions under which radio waves propagate through cities have changed dramatically.

Antenna parameters

Before you start manufacturing, you need to determine some of the parameters of these structures. They, of course, require in-depth knowledge in various areas of mathematics, as well as the laws of electrodynamics.

So, the gain is the ratio of the power at the input of the reference system to the power at the input of the antenna used. All this will work if each of the antennas creates the values ​​of the intensity and flux density with the same parameters. The value of this coefficient is dimensionless.

Directional factor is the ratio of the field strength generated by the antenna to the field strength in any direction.

It must be remembered that parameters such as KU and KND are not interrelated. There is a UHF antenna for digital TV, which has a very high directivity. However, its gain is small. These constructions are directed into the distance. There are also highly directional designs. Here it comes in combination with a very powerful gain level.

Today you can not look for formulas, but use special programs. They have already taken into account all the necessary parameters. You just have to enter some conditions - and you will receive a complete calculation of the UHF antenna, in order to then assemble it.

Manufacturing nuances

Any structural element in which signal currents flow must be connected using a soldering iron or a welding machine. Such a knot, if it is in the open air, suffers from a breakdown in contact. From this, various antenna parameters and reception levels can become significantly worse.

This is especially true for points with zero potentials. According to experts, it is possible to observe the voltage in them, as well as the antinode of the current. More precisely, this is the maximum current value. Is it present at zero voltages? No wonder.

These areas are best made from solid metal. Creeping currents are unlikely to affect the picture if the connections are welded. However, due to their presence, the signal may be lost.

How and with what to solder?

The UHF antenna with your own hands is not very easy to make. This involves working with a soldering iron. Modern TV cable manufacturers no longer make it copper. Now there is an inexpensive alloy that is resistant to corrosion. These materials are difficult to solder. And if you heat them long enough, there is a risk of burning the cable.

Experts recommend using low-power soldering irons, low-melting solders, and fluxes. Do not spare the paste when soldering. The solder will lay down correctly only if it is under a layer of boiled flux.

Catch T2

In order to enjoy digital TV, it is enough to purchase a special tuner. But it doesn't have a built-in antenna. And those that are offered as special digital ones are too expensive and pointless.

Now we will learn how to catch T2 on a completely homemade construction. Homemade UHF antenna is simple, cheap, high quality. Try it yourself.

The simplest antenna

To assemble this structure, you will not even need to go to the store. To manufacture it, a conventional antenna cable is enough. You need 530 mm of wire for the ring and 175 mm from which the loop will be made.

The TV antenna itself is a ring of cable. The ends need to be stripped and then connected to the loop. And to the latter you need to solder a cable that connects to the T2 tuner. So, on the ring, the screen and the central core are connected to the loop screens. In the latter, the central veins are also connected. And the cable to the tuner is soldered as standard to the screen and the central core.

So the UHF antenna turned out, made by hand. Its design turned out to be very cheap and practical. And it works no worse than expensive store options. It needs to be fixed on plywood or plexiglass. Construction clamps are perfect for this.

"People's" antenna

This design is an aluminum disc. The outer diameter of the element should be 365 mm and the inner diameter 170 mm. The disc should be 1 mm thick. First, you need to make a cut in the disc (10 mm wide). In the place where the cut is made, a PCB made of PCB should be installed. It should be 1 mm thick.

The board must have holes for the MZ screws. The board must be glued to the disk. Then you need to solder the cable leads to it. The center core should be soldered to one side of the disc, the shield to the other. In terms of quality, such a TV antenna will receive better with two discs, especially if it is located far from the TV repeater.

Universal antenna

Nothing supernatural will be used to make this structure. We will make it from various materials at hand. However, although it is homemade, it will work perfectly in the entire decimeter range. So, this UHF antenna, quickly made with its own hands, is in no way inferior to store-bought, more expensive designs. To receive T2, it will be enough completely.

So, to assemble this structure, you will need empty cans of canned food or beer. You need 2 cans with a diameter of 7.5 cm. The length of each is 9.5 cm. You also need to stock up on strips of textolite or getinax, always with foil.

Our cans need to be connected to the PCB strips using a soldering iron. The plate of this material, which will connect the containers at the top, should be covered with a continuous copper foil. On the bottom plate, the foil should be cut. This is done for convenient cable connection.

It is necessary to assemble the structure in such a way that the total length is not less than 25 cm. This antenna (UHF range) is a broadband balanced dipole. Due to its surface area, it has high amplification factors.

If suddenly you cannot find suitable cans, then you can use containers with a smaller diameter. However, then the foil will have to be cut at the top connecting plate as well.

"Beer" antenna

Do you like to drink beer? Don't throw away the cans. You can make a good antenna out of them. To do this, you need to fix two beer cans on any dielectric material.

First you need to choose the right cable, and then bring it to mind. For this, the cable must be stripped. You will see a shielding foil. There will be a protective layer underneath. But under it you can directly observe the cable.

For our antenna, we need to strip the top layer of this wire about 10 cm. The foil needs to be carefully twisted so that we end up with a branch. The protective layer for the central core must be stripped by 1 cm.

On the other hand, you need to solder the TV plug to the cable. If you were a subscriber of cable networks, then this part and cable will not even have to be purchased separately.

Now for the cans. It is advisable to use beer containers with a volume of 1 liter. However, good German beer in such cans is expensive, and domestic beer is not sold.

Banks need to be uncorked very carefully. Then you need to free the container from the contents, and then dry it well. Next, using a self-tapping screw, connect our screen on the cable and the jar. To the second you need to screw the central core.

For a better image quality, it is better to connect the containers and the cable with a spike.

It is necessary to fix the cans on some kind of dielectric material. It should be noted that they should be located on one straight line. The distance between them depends on the capacity. All this is selected only empirically.

Zigzag

The UHF zigzag antenna has the most simple design. The part itself is broadband. Its device allows for various deviations from the initial design parameters. In this case, its electrical parameters are almost not violated.

Its input impedance in a certain range depends on the size of the conductors that will form the basis of the canvas. There is a dependence here. The greater the width or thickness of the conductors, the better the antenna will be matched to the feeder. In general, any conductors can be used to make the web. Plates, tubes, corners, and much more are suitable for this.

In order to increase the directivity of such an antenna, it is permissible to use a flat screen, which will act as a reflector. The latter will reflect high-frequency energy towards the antenna. Such screens are often of serious size, and the phase depends mainly on the distance.

On the practical side, the reflector is rarely made from a single sheet of metal. More often it is made in the form of conductors that are connected in one plane. For design reasons, it is not worth making a screen that is too dense. The conductors from which the screen itself will be made are connected by welding or soldering to a metal frame.

This design is made very simply. It works well in the UHF range. In the USSR, it was a real people's irreplaceable model. It has a small size, so it can be used as an indoor UHF antenna.

The material will be copper tubes or aluminum sheet. The side pieces can be solid metal. Often they are covered with a net or covered with a tin. If one of the indicated methods is used, in this case, the structure must be soldered along the contour.

Do not bend the cable sharply. How to carry out this element, you can see in the pictures presented.

It must be guided in such a way that it reaches the side corner, but does not go beyond the antenna or side square.

Indoor antenna MV UHF

This design is designed for easy and reliable reception of digital TV signals. It can be made easily and very quickly. This will require an aluminum or copper bar. Its length should be up to 1800 mm. This antenna can also be used as an outdoor antenna.

The design is a rhombus-shaped frame. There should be two of them. One acts as a vibrator, the other acts as a reflector. To receive T2, it is necessary that the side of our rhombus is approximately 140 mm, and the distance between them is 100 mm.

After the frame is made and the structure gains rigidity, a dielectric is mounted between the two ends of our rod. It could be anything. The shape and size are completely unimportant. The distance between two points of the bars should be approximately 20 mm. The tops of our rhombuses need to be connected.

The feeder can be made from a cable. It must be connected to brass or copper petals, which should already be attached to the antenna lead.

If the resulting design does not meet your expectations, for example, poor reception quality or the repeater is far away, you can equip the antenna with an amplifier, and you will end up with an active UHF antenna. It is used both in the city and in the country.

The simplest UHF loop antenna

This construction resembles the number "zero". By the way, this is the coefficient of its amplification. It is ideal for T2 reception. This part is able to perform better than the products offered in stores.

It is also called digital, because with it you can perfectly catch digital broadcasting. It is narrowband, which is a significant advantage. It works on the principle of a selective valve, which makes it possible to talk about reliable protection against interference.

For assembly, you will need an ordinary 75 Ohm coaxial cable, as well as a regular TV plug. It is better to choose a cable with a large diameter from all options. You can use a cardboard box or something else as a stand.

How long the frame will be, we determine using programs for calculating antenna parameters. The material for making the frame can be used the same as for the cable. By the way, for calculations, you need to know the frequencies of digital broadcasting in your city.

The central core of the cable is not needed in the frame structure. The stripped wire is twisted together with the core and braid of the frame. Then this connection must be soldered.

The structure must be placed on a dielectric base. Better to keep it away from your tuner. It is important that there is no voltage at the antenna input.

So, we figured out how the UHF antenna is made with our own hands. As you can see, this is not a very difficult task. But now you can watch your favorite TV shows in digital quality. And such a structure is installed in the same way as an ordinary store one - on the roof. Screws or bolted connections can be used. It should be installed in a safe place so that during gusts of wind it does not fly off along with a piece of slate. It is desirable that the antenna be mounted at the highest possible height. In this way, you will eliminate the appearance of interference during the broadcast of cable or digital television.

So, imagine this situation: in the evening you decided to watch your favorite TV program, and suddenly the TV stopped showing. Or another case: you have arrived at the dacha, have already prepared for the rest and again the same situation - not a single channel is working. What to do in this case? The answer is simple - you need to make an antenna for the TV with your own hands, because most likely the cause of the breakdown is in this device. Next, we will consider the simplest options for creating, which will require a minimum of available tools and time.

Idea # 1 - Beer cans are in use!

This version of a homemade television antenna is the simplest and fastest to manufacture. The maximum number of channels that will be at your disposal is 7, but this figure may vary slightly depending on the region.

To make an antenna for a TV from beer cans, you will need the following materials:

  • 2 small screws, also called "bugs";
  • 2 prepared beer cans (empty, washed and dried);
  • from 3 to 5 meters of television cable (can be taken from a failed device);
  • soldering iron and tin (for better fixing of contacts), the presence is optional;
  • screwdriver;
  • wooden tremp;
  • electrical tape or tape.

It will not be a problem to find all the materials in the house, so having prepared them, we immediately get down to business.

In order to make a homemade antenna from cans, you need to follow these steps:

  1. We are preparing the cable. First, at a distance of 10 cm from the edge, you need to make an incision and remove part of the upper layer of insulation. Having opened access to the screen, we fold it into one turn. After that, we cut off the middle insulating layer, exposing the thin copper core of the cable. As for the other end of the conductor, there should be a regular plug.
  2. We prepare banks. With capacities that act as a signal receiver, there will also be no difficulties. First you need to find the optimal size of the beer cans. It is better to use liter, but if there are none, containers with a volume of 0.5 and 0.75 liters will do a good job.
  3. We summarize contacts. At this stage, the twisted cable shield is fixed to one jar, and the copper core itself to the other. Fixation is carried out with bedbugs using a screwdriver. In order to make the quality of the picture on the TV screen higher (signal transmission quality), it is recommended to fix the wire not only with bugs, but also with a soldering iron (grab a little). The result should look like this:
  4. Putting together a homemade TV antenna. The signal receiver is ready, now we are making a supporting structure, which we have a trempel. Using electrical tape, we fix the containers to the trempel (as shown in the photo). We draw your attention to the fact that banks must be strictly on one straight line, otherwise the homemade product will not work as we would like.
  5. We set up the antenna for the TV. Now you need to experiment with the optimal distance between the banks, as well as the place for hanging the device, so that the homemade product catches many channels. We turn on the TV and determine exactly how the receivers should be located and where is the most suitable place to work. This is where the creation technology ends.

As you can see, the whole process is pretty simple and not complicated. The optimal distance is 75 mm between the ends of the cans, and the best installation location is near the window. In individual cases, the distance between the banks can be made more or less.

Idea # 2 - Using wire

Another equally good option that is advisable to use in the village is a homemade copper wire antenna with an amplifier.

All you need for manufacturing is:

  • amplifier (fit from an old device);
  • two pieces of wire 180 cm each;
  • a piece of metal (or wooden) plate 15 * 15 cm;
  • an electric drill with a set of drills (or a welding machine);
  • small bolts;
  • hammer;
  • iron pipe;
  • TV cable of suitable length.

So, in order to make a copper wire antenna for a TV yourself, you need to follow these steps:


Pay attention - in the photo examples, both the amplifier, and the reflector, and the wire are covered with paint. Painting protects the structure from corrosion and other adverse factors, significantly extending the life of a homemade TV antenna.

Idea # 3 - Home HDTV Device

If the first 2 options worked at a frequency of no more than 270 MHz, then the next manufacturing method will allow you to enjoy a better picture, because the signal range can reach up to 490 MHz. The only detail that is unlikely to be found among the household trivia is the 300 to 75 ohm matching transformer. You will need to buy it in advance if you decide to make an antenna for the TV yourself as an experiment and improve your skills. Although there are instructions for making a homemade transformer, you can find and use it.



From the materials you will need:

  1. Scotch
  2. Cardboard
  3. Stationery knife
  4. Foil
  5. Stapler
  6. Scissors
  7. Marker
  8. Roulette

Having prepared this whole school set, let's get down to business!

First, you need to sketch (or print on a computer) this diagram:


Now, according to the scheme, we cut out all the parts, including the necessary pieces of foil:



After that, you need to make a reflector with dimensions of 35 * 32.5 cm (height and width). We glue one of the sides with foil.



In the middle we cut out two identical rectangles, which are necessary in order to completely assemble the homemade antenna signal trap for the TV. The rectangle should be 3.5 cm long, its purpose is to maintain the distance between the reflector and the auxiliary parts.



We glue the parts on a rectangle, and when the cardboard homemade product hardens, we drill holes for the TV cable.



We connect the transformer and insert the cable into the plug. More powerful TV antenna is ready to use! It should also be noted that this homemade option is suitable only for indoor use, because the paper quickly deteriorates on the street.

Another option for a powerful home-made device:

Idea number 4 - Apartment option

There is another way to make a powerful antenna for a TV from improvised means, which is suitable for both street and apartment use.

To manufacture the device, you will need the following materials and tools:

  • 4-meter copper wire with a cross section of 4 mm square;
  • board of any thickness, 55 cm long and 7 cm wide;
  • wood screws;
  • ruler or tape measure;
  • simple pencil;
  • screwdriver;
  • soldering iron;
  • plug.

So, first, according to the drawing, we drill holes in the board:

Then we transfer the drawing data to the board and drill into the corresponding attachment points.

Next, the copper wire must be cut into 8 pieces of 37.5 cm each.

The insulation must be removed in the middle of each of the 37.5 cm lines (as shown in the picture).

We cut off 2 more copper pieces of wire 22 cm long and conditionally divide them into 3 equal parts, while at the points of inflection, again, we remove the insulation.

We bend the prepared wire in bare places. We draw your attention to the fact that for those segments that are bent in half, the distance between the ends must be made 7.5 cm (the optimal value for receiving the signal of a homemade television antenna).

Next, we attach the plug to the finished homemade product, and we already connect the TV cable to it.

This completes the manufacturing process. We choose a suitable place and install the device.

Here we have provided the most simple instructions. We hope that now you know how to make a home TV antenna with your own hands! We draw your attention to the fact that today on the Internet you can find many other options in which inventors do without cans and wires. Of the rest of the available tools, copper tubes, aluminum discs and electrodes are often used. The advantage of the options we have listed is that you can quickly make such TV antennas with your own hands, without spending the whole evening on it.

Related materials:

Visual video instruction for creating a simple antenna from cans

Assembling a digital antenna from a TV cable and a cardboard box

HDTV antenna from available tools

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Despite the huge number of television antennas on the consumer market, which can be easily purchased at any electronics store, interest in how to make an antenna for a TV with your own hands does not disappear. This interest can be explained by the unwillingness to spend money on buying an antenna, being far from retail outlets (if you are in the outback or in the country) or the failure of a purchased one.

Antennas for a TV receiver can be divided into several types.

  1. All-wave antenna- the design is simple to manufacture, it can be made from simple materials at hand. It picks up a digital signal quite well outside of the city, where there is not much interference. When located near a broadcasting tower, it can receive analog TV.
  2. Log-periodic band antenna also easy to manufacture. It has perfect consistency with the feeder across all ranges, without changing the parameters in it. Since this design has average technical parameters, it can be used in the country, or as an indoor antenna in the city.
  3. Decimeter antenna... A simplified modification of the Z-antenna is often used, it works well, regardless of the signal reception conditions.

All-wave antenna

All-wave TV signal catchers are also called frequency independent (FFA). Their designs can be different.

Of two petals

The figure shows an all-wave antenna made of two metal plates a triangular shape and two wooden slats on which a fan-shaped copper wire is stretched.

Copper wire can be taken of any diameter, it does not play a special role. The ends of the wire are attached at a distance of 20 to 30 mm between each other. Plates with other ends of the wire welded together should be spaced 10 mm apart.

The metal plate can be replaced with a square piece of fiberglass, which has copper foil on one side.

Since the construction of a homemade antenna is square, its height will be equal to the width, and the angle between the canvases is 90 degrees. Zero potential point marked in yellow in the figure. It is not required to solder the cable braid in this place - a tight tying will be enough.

A two-lobe-shaped TV signal receiver assembled in this way is capable of receiving both all decimeter and meter channels. Moreover, he is good at picking up the signal in all directions. But if you install the PN in the area of ​​poor signal reception from the TV tower, it will work normally only with an amplifier. Others can be applied.

Butterfly shape

A do-it-yourself TV antenna can be made in the shape of a butterfly. To make this fairly powerful antenna yourself, you need to prepare a plate or plywood with dimensions of 550 x 70 x 5 mm, a wire with a copper core with a cross section of 4 mm, and, accordingly, a PK75 cable.

  1. Mark the holes on the plywood and drill them. Dimensions shown are in inches. Below is a table for converting inches to mm.


  2. From a copper wire, it is necessary to cut 8 pieces of the same length, 37.5 cm each.
  3. In the center of each wire, remove the insulation from the sections (2 cm each), as in the figure.

  4. After that, you should cut off 2 more pieces of wire, already 22 centimeters each, divide them into 3 equal parts and remove the insulation at the separation points.

  5. Give the segments V-shape... Care should be taken to maintain a distance of 7.5 cm between the ends of the wire. It is this that is optimal in order to receive a clear signal.

  6. Connect all the elements according to the figure below.

  7. Next, you need to purchase a jack to connect a plug to it.
  8. The cable must be soldered to the coil pins as shown.

  9. Make 2 more lengths of wire to connect the antennae to the socket.
  10. Screw the socket onto the board and connect all the elements.


That's all - you made an antenna for the TV with your own hands.

From beer cans

To make such an original PNA, you will need 2 cans (0.5 l or 0.75) of beer or other drink. But before you make a TV antenna, you need to consider some material requirements... Namely, it is recommended to purchase a high-quality television cable with a resistance of 75 ohms per meter. How is it correct? Make sure the center strand is strong and the braid is double and solid.

Do not forget that the longer the cable is, the stronger the signal damping will be, which is especially important for receiving meter waves, in contrast to the UHF, for which the length of the wire also matters, but not so much.

It will also be necessary to prepare a regular wooden trempel, a pair of self-tapping screws, electrical tape or scotch tape and, if possible, a soldering iron with tin.

Antenna from beer cans can receive both decimeter wavelengths and meter.

For clarity of the whole process, you can watch the video.

Log-periodic antenna

A log-periodic antenna (LPA) can be used to receive radio waves of both meter and decimeter ranges. For the manufacture of such a signal receiver, you can use an aluminum tube with a diameter of 10 mm and metal rods (pins), which can be bought at a store where fasteners are sold, as a stand. Ideally, instead of threaded rods, it is better to use smooth tubes or rods. A plastic U-shaped box is taken as a basis.

When the soldering is completed, the manufacture of the device can be considered complete and you can start testing your creation.

Decimeter antenna

Homemade decimeter signal catchers can be of various shapes and designs, from the simplest to make to the more complex devices.

Annular

The simplest design for receiving UHF can be done in a short time with your own hands from scrap materials... All you need is a coaxial cable and an appropriately sized piece of plywood.

Now all this needs to be collected:

  • prepare a piece of coaxial cable (PK75) 530 mm long (a ring will be made of it);
  • also cut another piece of cable 175 mm long - this will be a loop;
  • make a ring (1), solder a loop (2) and a cable (3) to it that connects to the TV;
  • fix all this on a plywood sheet and direct the made TV signal receiver towards the TV tower.

If your TV receiver is using such an antenna, try making a more sophisticated device.

In the form of a figure eight

A home antenna of the UHF range with your own hands can be made of wire in the form of a number 8. To make such a receiver, you can use copper or aluminum wire with a diameter of 3 to 5 mm, as well as a cable RK75. During the manufacturing process, you will also need glue gun.

Manufacturing progress.

  1. Using the wire cutters, you need to cut off 2 pieces of wire, 56 cm each.
  2. At the ends of each segment, make a loop, which should go 1 cm.
  3. Bend the wire squares and connect the loops. Solder the cable to the squares as shown in the figure. The central core is soldered to one square, the braid to the other. The distance between the elements should be 2 cm. The entire structure can be fixed in the lid from under a 20 liter water bottle by filling with glue.

Such a dmv range receiver can be located anywhere, and it does not require an amplifier. Unless, an amplifier may be needed if the device is outdoor, and the cable length will be considerable. In this case, to compensate for signal losses, you will need to install it.

From a metal-plastic pipe

A do-it-yourself TV antenna can also be made from an ordinary metal-plastic pipe. This will result in a device for receiving dmv with a possible range from 480 MHz to 1000 MHz. This “model” uses a pipe with a diameter of 16 mm and a cable of 5.5 m. The ring will require 55 cm of pipe, and the rack will need 14 cm, which is equal to a quarter of the wavelength. This serves to better match the outer sheath of the cable and reduces high-frequency currents.

The cable exit in this design is made through a hole in the pipe. The cable sheath should be fastened with a clamp to the stripped part of the pipe. The central core of the cable is attached to the ring (a screw, washer and nut can be used). Such a homemade product works well as a room antenna in apartments with reinforced concrete walls that poorly transmit a television wave. Thanks to the extended cable, it can be taken out to the balcony or placed on the windowsill - the reception quality will only improve.

In the form of a frame

Another design of the dmv antenna is assembled in the form of a frame. It will be made from aluminum plates(stripes).


Thus, hand-made antennas will help you save money on their purchase, and in some cases get out of the situation when there is a TV, but the standard antenna is out of order, or it is not there at all. Moreover, the quality of reception of homemade products is not worse than factory counterparts. If you do not want to tinker with the device yourself, then the information about being in the store will come in handy.