How to make an antenna with your own hands. Do-it-yourself digital dvb-t2 antenna

You will need

- ski poles;
- plastic tube;
- M3 screws;
- nuts;
- washers;
- plastic clamps;
- dowels;
- drill with drills;
- screwdriver;
- pliers;
- wrench;
- coaxial cable;
- socket for TV;
- roulette;
- hacksaw for metal;
- accessories for soldering.

Instruction

Take metal skis - aluminum or titanium. Make them vibrators for the future. There should be two vibrators, they have the same length. Decide which channel you will watch. The length of the vibrators depends on this. For 1-3 it is 1000-1100 mm, for 4-6 - 750 mm, for 7-9 - 360 mm, for 10-12 - 310 mm. If the length of the ski poles is not enough, splice the tubes from several pieces by connecting them with metal tubes of a larger diameter. Suitable, for example, tubes of old folding beds. You can fasten the vibrators in another way - by putting them on metal rods. But you do need to make contact.

Connect the vibrators to each other with an insulating tube. As such a tube, you can use, for example, a piece from a gymnastic hoop. A white plumbing pipe is also suitable (black is not good, because it contains, and, accordingly, is a poor insulator). You can also take a wooden cork made from wood that has been well dried or boiled in paraffin. The distance between the ends of the metal tubes should be 6-8 cm.

Stepping back 2 cm from the ends of the tubes connected by the plug, drill through holes with a diameter of 3 mm in each. Such an antenna can already be connected to a TV if it has an input for a two-wire line. In this case, a lighting electric wire can be used as a cable, which is attached to the antenna with two through screws, passed through the drilled holes.

But usually on modern TVs a coaxial connector is used. To connect a homemade antenna, you need a matching device. Take a piece of TV cable equal in length to one vibrator. Attach its central core on both sides to the vibrator with screws. You have received the so-called U-knee.

Cut one shoulder of the U-bend in half lengthwise and strip the braid and cable cores. Similarly, prepare the other end of the cable that goes to the TV connector. Solder together all three braids of the resulting cable sections. Isolate the spike. Solder all three center strands together. The matching device is ready, the antenna can be connected.

Such an antenna should be oriented perpendicular to the direction of the television center. It can be hung from the ceiling or on the wall using plastic clamps. If the polarization of the wave is vertical, such an antenna must also be placed vertically. This is more convenient, because when installed horizontally, such an antenna looks bulky.

If you suddenly need a television antenna during your stay in the country or on vacation, but there was no factory model at hand, you can do without your favorite TV programs, but it is much more interesting and faster to make such a device yourself. It can be made to receive certain channels in the meter or decimeter range. Next, we will look at how a do-it-yourself TV antenna is made in several ways, from which you can choose the most suitable one for yourself.

A fairly simple version of an indoor antenna, which can be easily implemented at home in a short period of time. Designed to receive television channels broadcast in the UHF range. To make it, you will need a piece of coaxial cable, plywood or other sheet material as a base, electrical tape for fixing, a knife and a soldering iron.

Rice. 1: Coaxial cable antenna

Take a piece of coaxial cable 0.53 m long and bend it into the shape of a ring (1) with open edges and fix it in this shape on a sheet of plywood;
From the same cable, cut a 0.175 m piece for the loop (2) and connect as shown in the figure.
Connect the cable (3), on the other end of which install a connector for connecting to a TV.

The simplest antenna is ready, but it may not be enough to receive a signal, so you will need an active gain block. Or make a more complex figure-eight model.

Antenna "eight"

A fairly simple version of a homemade antenna, it can be assembled within a few minutes. To do this, you will need any cardboard box, in this case it is used from under shoes, a plug, a stationery knife, a soldering iron, adhesive tape, foil and glue.

The manufacturing process consists in the following steps in turn:

Open the box and clean the inner surface of accumulated dust and debris, if they are absent, you can immediately proceed to pasting.
Apply a thin layer of glue to the bottom of the box, it is important that it does not change the geometric parameters of the foil located on it. Paste the bottom with foil - it will act as a signal reflector.
Rice. 2. Cover the bottom of the box with foil
Close the box and seal it with tape so that it cannot open spontaneously.
Install two pieces of cable in the shape of a figure eight on the cover, fix the sides of which with tape.
Rice. 3: make a figure eight and fix with tape
In the middle of the figure eight, strip the cable and make two leads from the metal braid to connect the antenna.
Rice. 4: in the middle of the figure eight, trim the ends
Cut off a piece of conductor to connect the antenna to the TV, its length is selected according to the distance from the installation site to the TV or.
Strip one end of the connecting cord under the connector, strip the second in such a way as to collect the output from the screen and the output from the central core through 1 - 2 cm of insulation.
Rice. 5: strip the cable
Connect the cable leads to the figure eight leads as shown in the figure.
Rice. 6: connect cable pins to figure eight pins

Connect the TV connector to the second end, and connect to the TV.

The G8 antenna is ready for use, today it will be an excellent replacement for satellite television, since the picture of a digital signal is in no way inferior to it.

Double and triple square

Unlike the previous version, assembling the antenna in the form of a double and triple square will require much more effort. But such a device will allow you to receive even weak television signals, the main thing is to ensure accurate orientation to the repeater. At the same time, the quality does not depend on the distance to the source, the main thing is to observe the overall dimensions. For its manufacture you will need: metal tubes (copper, brass, aluminum) or rods, a dielectric rod, a wooden base for the supporting structure, connecting wires.

Depending on the diameter of the tubes, the antenna will be able to receive a different number of channels in a certain frequency range:

10 - 20mm is suitable for reception in the meter range, can catch from 1 to 5 channels.
8 - 15mm is suitable for reception in the meter range, can catch from 6 to 12 channels.
3 - 6mm is suitable for channels in the decimeter range.

Rice. 7: double and triple square antenna circuit

As you can see in the figure, structurally, a double and triple square is two and three regular-shaped frames that differ in size. Depending on the overall dimensions, the length of the received wave will also change.

Wavelength	1	2	3	4	5	6	7	8	9	10	11	12
V	1450	1220	930	840	770	410	390	370	360	345	330	320
R	1630	1370	1050	950	870	460	440	420	405	390	375	360
A	900	760	580	530	480	250	240	230	220	210	210	200
W	1500	1260	970	880	800	430	410	390	375	360	350	335

Channels, pcs	V	R	A	W
21-26	158	170	91	152
27 – 32	144	155	83	139
33 – 40	131	141	75	126
41 – 49	117	126	68	113
50 – 60	105	113	60	101

For a triple square, the dimensions are shown in the table below

Table: dependence of dimensions on the received wave of the meter range, mm

Channels	1	2	3	4	5	6	7	8	9	10	11	12
D	1255	1060	825	750	688	370	354	340	325	312	300	290
V	1485	1260	975	890	812	438	418	400	385	370	357	345
R	1810	1530	1190	1080	990	532	510	488	470	450	435	420
A	630	532	412	375	345	185	177	170	163	157	150	145
B	915	775	600	545	500	270	258	246	237	228	220	210
W	1500	1260	970	880	800	430	410	390	375	360	350	335

Table: dependence of dimensions on the received wave of the decimeter range, mm

Channels, pcs	D	V	R	A	B	W
21-26	134	158	193	67	98	152
27 – 32	122	144	176	61	89	139
33 – 40	110	131	160	55	80	126
41 – 49	99	117	143	50	72	112
50 – 60	89	105	129	45	65	102

The short-circuited bridge shown in the figure is designed to connect a symmetrical frame to an unbalanced cable and acts as a matching block.

The manufacturing process consists of the following steps:

Bend the tube into squares according to the given dimensions;
Connect them at the top with an arrow of conductive material, and at the bottom with an arrow of dielectric material;
Install the outdoor antenna on a wooden base;
Cut the cable and separate the braid into a separate terminal;
Connect the cable to the antenna, and terminate the other end under the antenna plug to transmit television broadcasts to the TV.

The antenna is ready, this option is suitable for outdoor placement, so it is best to install it on a roof or a free-standing support.

From metal cans

If you can find a pair of even beer cans made of tin or aluminum at home, then you have the opportunity to quickly assemble a good TV receiver. To do this, you need to take two cans of the largest possible volume, a good result will be achieved with a volume of 1 liter, but if they are not there, then 0.5 liters will do, a screwdriver or a screwdriver with a pair of self-tapping screws, a soldering iron, adhesive tape, a television cable, a base made of dielectric material (in this case, a wooden trempel is used).

The process of manufacturing an antenna from metal cans consists of the following steps:

Make loops for connecting at the output of the braid and core.

After installation, you should configure the channels by changing the distance between the banks. The optimal position is selected based on the quality of the signal on the TV. Such an antenna will receive about seven analog TV channels.

framed

To make such an antenna, you will need aluminum plates, a metal mesh for making a reflector (from a barbecue, for plaster, etc.), bolts with nuts or rivets to fix frame parts, a cable with a plug for connecting to indoor TV, a drill, a screwdriver and pliers.

Rice. 10: frame antenna

The manufacturing process of the antenna is as follows:

Cut the aluminum strips to the desired size and drill holes at the ends for bolting.
Assemble the frame as shown in the figure above, the joints are overlapped. To prevent oxidation of these points, it is desirable to cover them with paint or varnish.
Connect a television cable with an antenna connector to points A and B on the antenna.
Fasten the frame to the reflector, most importantly, pay attention that the latter does not short-circuit the electrical circuit of the antenna itself.
Install on the mast and place in the place provided for this.

If the signal is weak, you can get a more powerful antenna by including it in the circuit.

In the shape of a butterfly

Another version of the all-wave antenna, which allows you to receive a sufficiently large number of channels in good quality. Due to this, its work can replace the use, but the manufacturing process also requires utmost attention, accuracy and time. Structurally, it will consist of a wooden board and several pieces of copper wire with a 4mm strand, bent in the shape of butterfly wings, hence the name of the model. Initially, you need to mark the location of the holes on the board and drill them according to the diagram:

Rice. 11: butterfly antenna hole pattern

The broadband antenna is ready to use, you can install it in the most suitable place in the room to receive TV signals.

Zigzag antenna Kharchenko

This version of the antenna is designed for broadcasting digital television, which is carried out in the decimeter range. The main advantage is that there is either a digital signal or it is completely absent, so the image is of a fairly high quality.

Structurally, Kharchenko's antennas consist of two rhombuses, which are made of conductive materials. Copper or aluminum wire, rod, corner or tire is suitable for them. A schematic representation of a zigzag antenna is shown in the figure below.

Rice. 15: diagram and practical implementation of the Kharchenko antenna

In this case, the dimensions must be calculated based on the wavelength. To receive digital broadcasting, the wavelength is divided by 4 - this will be the size of B1, and in order to tune the antenna to a wider band, the B2 side must be made 1 cm smaller than B1, for example, in a ratio of 12.5 and 11.5 cm. For bending copper wire, you can use pliers, a vise or a hammer. There is a reflector on the reverse side of the antenna for better TV signal reception, but this refinement was relevant for analog television, it is not necessary to install it in digital TV.

In addition to the wire for the manufacture of the device, you will need a television cable, a frame for placing the receiver, insulating materials, and a plug for connection. From the tools, take an abrasive wheel or sandpaper, a soldering iron.

The manufacturing process includes the following steps:

Prepare the wire of the required length, in this case 112mm is used, if you use other sizes, you should not forget about the margin for bending points.
Bend the wire antenna as shown in the diagram, maintaining 90º angles and making a gentle turn at the bends.
Rice. 16: bend the wire
To connect the ends, make grooves and connect with thin wire or make two loops and connect them together, for better contact and to prevent oxidation, tin them. If there is varnish on the conductor, it should be cleaned off before tinning.
Rice. 17: tin ends
Repeat the same procedure with the opposite side to make a second contact. The distance between them should be about 2 cm.
Strip the coaxial cable from both sides - one for connection to the antenna, the second for input to the signal receiver. For the antenna, you need to remove the outer insulation by 3 - 5 cm and assemble the multi-wire braid into a separate terminal. For a TV, strip about 1 - 2 cm and solder to the plug.
Install the antenna on the base and solder the cable to it.
Rice. 18: connect the cable to the terminals
To protect against atmospheric influences and give additional rigidity, the place of soldering is treated with hot melt adhesive.
Rice. 19: treat the place of soldering with hot glue

The antenna is ready for connection to the TV, if all the requirements specified by the designer are met, you will get an excellent version of the device, which is not inferior to the factory models in terms of parameters.

Video ideas

Sometimes a television antenna fails at the most inopportune moment, or it simply is not at hand. For example, during a trip to the country. In this case, the question arises of how to make an antenna for a TV with your own hands from what is at hand.

With a homemade transmitter, you can watch a limited number of channels. Yes, and the reception may be of less quality than that of a purchased device. And yet, knowing how to make an antenna yourself from improvised means can come in handy. An antenna can be either simple or complex. The device will be able to receive almost all types of broadcasting.

Antenna types

Before you start making a TV antenna with your own hands, you should understand the types and technical characteristics of television receivers.

Depending on the installation location, indoor and outdoor television receivers are distinguished. Indoor devices are effective only in areas with good signal reception. They are not suitable for country TVs. For rural areas and areas remote from the TV repeater, street TV receivers are used.

According to the type of signal amplifier, television receivers are active and passive. Passive type structures receive and amplify impulses due to their own geometry. They do not need power supply, do not introduce their own interference and noise into the signal they receive. It is easiest to make a passive type antenna yourself.

Active devices are equipped with a signal amplifier, which is powered by the mains. The active amplifier itself creates interference and distortion in the zone of reliable reception in case of choosing too powerful or low-quality device.

Broadcasting is carried out on meter or decimeter waves. For receiving only meter or only decimeter broadcasting ranges, band television receivers are best suited. For example, for the transmission of DVB-T2 digital terrestrial television in our country, only the decimeter range is used.

A log-periodic, or all-wave, television antenna can receive waves of both the meter and decimeter ranges. This is a wideband design with 10 vibrators. The log-periodic device in terms of gain corresponds to a 3-4 element all-wave antenna.

Operating frequencies are limited by the largest and smallest receiver vibrators. It matches well with the feeder. Its gain does not change, so balancing and matching devices are not required to connect to the feeder.

A cable with a resistance of 75 ohms enters the lower tube, exits at the end (which is directed towards the TV center) and is connected by a braid to the end of the lower tube, and the core to the end of the upper tube.

Outwardly and according to the principle of operation, a log-periodic television antenna is several channel-wave devices connected together. Moreover, each of them has its own vibrator, reflector and director. When a signal arrives, vibrators are excited that are closest in size to half the wavelength of its wave. Such television antennas are used to receive both digital and analog broadcasts.

The wave channel receiver has the simplest design, which can be quickly assembled from simple and affordable materials. It receives an analog TV signal near the TV tower and a digital one outside of large settlements, where there is little interference.

We use beer cans

An antenna for giving with your own hands from beer cans is the simplest and most affordable passive type design. It can be done quickly and in the absence of basic skills. At the same time, it copes well with the reception of decimeter broadcasting ranges.

To assemble an antenna from beer cans you will need:

cable of sufficient length;
aluminum cans (for the simplest design, 2 is enough);
2 bolts or self-tapping screws;
plug (F - connector) for connecting the cable to the TV;
electrical tape or tape;
base made of wood or plastic for attaching cans (you can use wooden hangers for clothes).

The antenna circuit is simple:

Each jar is attached with electrical tape or tape to the base pin at a distance of 7 cm from each other.
The cable is stripped on one side. They are bred and attached to the rings of cans or to screwed screws. It can also be soldered. A plug is attached to the free end.

This simple design is suitable for installation both indoors and outdoors. For external use, jars are covered with a large plastic container with a cut neck and bottom. The cable is pulled through a hole made on the side, which can be sealed with boiling water. The finished receiver is connected and configured through automatic channel search.

You can also make an analogue of a satellite dish with your own hands. For this purpose, a simple umbrella is used. You will also need:

aluminium foil;
copper cable;
1 tin;
amplifier and power supply to it.

DIY antenna for TV from beer cans

Operating procedure:

The segments of the umbrella between the spokes are measured and the elements corresponding to these dimensions are cut out of the foil. They are sewn to the dome of the umbrella, covering its entire inside.
A television signal receiver is installed at the focus of the metal grating. The amplifier will be a core, from which 4 cm of braiding was previously removed, and a cable shield that protects against interference.
An oval is cut out of an aluminum can. A hole is made in the center of it, through which a bare core is threaded and a contact is soldered. To protect against oxidation and corrosion, the junction is covered with plasticine.
The amplifier is powered by a cable.
The receiver is attached to the handle of the umbrella with adhesive tape so that it does not touch the metal. This will protect against interference and distortion. The connection point must be sealed with plasticine.
The power supply is placed next to the TV, and the antenna is turned towards the repeater.
Channels are set by operating the dish until the best signal is obtained.

Such an antenna works best if the tower is located no further than 35 km from it.

We use wire

Another simple design is a homemade wire antenna. For its manufacture, you can use copper or brass wire. These materials are resistant to oxidation.

The wire must be stripped from the ends of the insulation. One of them is connected to the TV, and the other to the battery of the heating system. The pipe is displayed on the roof - it will work as a signal amplifier. Such an antenna can receive no more than 5 signals. The wire can be stretched out onto the balcony and secured to a clothesline.

You can make a TV antenna out of wire in another way. It will require:

2 pieces of copper wire 3-4 mm wide and 1.8 m long;
a plate of plywood or metal measuring 15 by 15 cm;
amplifier (you can use old decimeter amplifiers);
electric drill;
television cable;
iron pipe or fittings for the manufacture of the mast;
bolts.

Such a copper wire antenna is assembled as follows:

Catchers are made, for which they bend the wire in the form of 2 rhombuses with sides of 45 cm. This is the optimal frame length for such a device.
The resulting rhombuses are fixed on the base. To do this, at the attachment points, flattening the wire, drill holes and screw in the bolts.
If a metal plate is used as the base, then a welding machine can be used to attach the trap.
We fix the amplifier in the center and connect the cable to it.

As a mast here, the easiest way is to use a metal pipe, which can simply be dug into the ground or attached to any suitable support. The antenna is fixed at the top of the mast, and the cable is pulled through it. The entire structure is painted to protect against corrosion.

Another popular copper wire television receiver that you can make yourself is a small-sized butterfly antenna of an unusual shape. For external use, such a device is made of wire 2-4 mm thick, for internal use - 2 mm and thinner.

To receive TV channels make a frame. Frame length - 500 mm, width - 200 mm. It is twisted in such a way that 2 identical triangles are obtained, which are separated with wire cutters and soldered to the cable, leaving a 14 mm distance between the vertices. A plug is attached to the other end of the cable. The structure is attached with adhesive tape or electrical tape to a material with dielectric properties - wood, ebonite, plastic.

Home Digital HDTV

A powerful TV antenna capable of receiving a 490 MHz signal is made from a transformer, which is better to purchase, since it will not be easy to make it yourself. You will also need:

cardboard;
Scotch:
foil;
stapler;
glue.

For the manufacture of a television receiver, a scheme is used according to which all parts are cut out of cardboard. Elements are glued with foil, bent and cut. It is best to find the template and diagram first through a search engine and print it on a printer or redraw it from a printed publication.

First you need to make a reflector about 35 cm long and paste over it on one side with foil. 2 rectangles of the same size are cut in the middle for attaching the trap.

An antenna is assembled from prepared parts. Retreating 35 mm from the reflector, elements of the “butterfly” shape are glued to the plate. They can be attached with a stapler. In the middle of each such element, a hole is made for the cable, to which a transformer is connected and a plug is attached.

Option for an apartment

You can make an antenna for indoor use in any of the above ways.

Another simple option at home is made as follows.

A simple do-it-yourself loop indoor antenna is made of copper wire or a cable with foil in the winding. The device not only receives television channels, but also performs the function of a selective anti-interference filter.

To calculate the size of the loop, you need to know the frequency of the wave for a given region. The length of the loop will be equal to the product of the coefficient (300 units) by the average frequency range.

Cut off the required amount of wire or cable, if necessary, clean the edges. They fold a loop out of it and solder the TV cable leading to the receiver. A plug is attached to it.

The design can be hung or installed on a stand. This simple device, with accurate calculations, is most effective for digital television.

A reliable device for the home is a diamond-shaped antenna. She is the simplest representative of zigzag television receivers. To improve reception, it is equipped with capacitive inserts and a reflector.

The device is assembled from plates or tubes 1-1.5 cm wide made of brass, copper or aluminum. For the manufacture of capacitive inserts, foil, tin or metal mesh is used, which are soldered around the perimeter. The cable is laid from the center and on one side, avoiding sharp bends. It must not leave the frame.

Buying a good antenna for the country is not always advisable. Especially if it is visited from time to time. It's not so much the cost, but the fact that after a while it may not be in place. Therefore, many people prefer to make an antenna for giving their own. The cost is minimal and the quality is good. And the most important point - a do-it-yourself TV antenna can be made in half an hour or an hour and then, if necessary, it can be easily repeated ...

Digital television in DVB-T2 format is transmitted in the UHF range, and there is either a digital signal or it is not. If the signal is received, then the picture is of good quality. Concerning. any decimeter antenna is suitable for receiving digital television. Many radio amateurs are familiar with the TV antenna, which is called "zigzag" or "eight". This do-it-yourself TV antenna is assembled in just a matter of minutes.

To reduce the amount of interference, a reflector is placed behind the antenna. The distance between the antenna and the reflector is selected experimentally - according to the "purity" of the picture
You can attach foil to the glass and get a good signal ....
Copper tube or wire is the best option, it bends well, it is easy to

Making it is very simple, the material is any conductive metal: tube, rod, wire, strip, corner. She accepts, despite the simplicity, well. It looks like two squares (rhombuses) connected to each other. In the original, a reflector is located behind the square - for more confident signal reception. But it is more needed for analog signals. To receive digital television, it is quite possible to do without it or install it later if the reception is too weak.

materials

Optimum for this homemade television antenna, copper or aluminum wire with a diameter of 2-5 mm is suitable. In this case, everything can be done in just an hour. You can also use a tube, a corner, a strip of copper or aluminum, but you will need some kind of device to bend the frames of the desired shape. The wire can be bent with a hammer, fixing it in a vise.

You will also need a coaxial antenna cable of the required length, a plug suitable for the connector on your TV, some kind of mount for the antenna itself. The cable can be taken with a resistance of 75 ohms and 50 ohms (the second option is worse). If you make a TV antenna with your own hands for installation on the street, pay attention to the quality of the insulation.

Mounting depends on where you are going to hang a homemade antenna for digital television. On the upper floors, you can try to use it as a home and hang it on curtains. Then you need large pins. In the country or if you take a home-made television antenna to the roof, you will need to attach it to a pole. For this case, look for suitable clamps. To work, you will also need a soldering iron, sandpaper and / or a file, a needle file.

Do you need a calculation

To receive a digital signal, there is no need to count the wavelength. It is simply desirable to make the antenna more broadband - in order to receive as many signals as possible. To do this, some changes have been made to the original design (pictured above) (further in the text).

You can do the calculation if you want. To do this, you need to find out on which wave the signal is broadcast, divide by 4 and get the required side of the square. To get the required distance between the two parts of the antenna, make the outer sides of the diamonds a little longer, the inner ones shorter.

Drawing of the G8 antenna for receiving digital TV

The length of the "inner" side of the rectangle (B2) is 13 cm,
"outer" (B1) - 14 cm.

Due to the difference in lengths, the distance between the squares is formed (they should not be connected). The two extreme sections are made 1 cm longer - so that you can roll the loop to which the coaxial antenna cable is soldered.

Frame making

If you count all the lengths, you get 112 cm. We cut off the wire or the material that you have, take the pliers and the ruler, and begin to bend. The angles should be at 90° or so. With the lengths of the sides, you can make a little mistake - this is not fatal. It turns out like this:

The first section is 13 cm + 1 cm per loop. The loop can be bent immediately.
Two sections of 14 cm.
Two 13 cm each, but with a turn in the opposite direction - this is the place of the inflection to the second square.
Again two 14 cm.
The last one is 13 cm + 1 cm per loop.

Actually the antenna frame is ready. If everything was done correctly, a distance of 1.5-2 cm was obtained between the two halves in the middle. There may be slight discrepancies. Next, we clean the loops and the place of the inflection to bare metal (treat with fine-grained emery), tin. Connect two loops, compress with pliers to hold tight.

Cable preparation

We take the antenna cable, carefully clean it. How to do this is shown in a step-by-step photo. Strip the cable on both sides. One end will be attached to the antenna. Here we clean it so that the wire sticks out 2 cm. If it turned out more, the excess (later) can be cut off. Twist the screen (foil) and braid into a bundle. It turned out two conductors. One is the central monocore of the cable, the second is twisted from a multitude of braid wires. Both are needed and need to be tinned.

Solder the plug to the second edge. There is enough length of 1 cm or so. Also form two conductors, tin.

The plug in those places where we will carry out soldering, wipe it with alcohol or a solvent, clean it with emery (you can use a needle file). Put the plastic part of the plug on the cable, now you can start soldering. We solder a monocore to the central outlet of the plug, and a stranded twist to the side outlet. The last thing is to crimp the grip around the insulation.

Then you can simply wind the plastic tip, you can fill it with glue or non-conductive sealant (this is important). While the glue / sealant has not hardened, we quickly assemble the plug (we wind the plastic part), remove the excess composition. So the plug will be almost eternal.

DIY DVB-T2 TV antenna: assembly

Now it remains to connect the cable and frame. Since we were not tied to a specific channel, we will solder the cable to the midpoint. This will increase the bandwidth of the antenna - more channels will be received. Therefore, we solder the second cut end of the cable to the two sides in the middle (those that were stripped and tinned). Another difference from the “original version” is that the cable does not need to be looped around the frame and soldered at the bottom. This will also expand the reception range.

The assembled antenna can be checked. If the reception is normal, you can finish the assembly - fill the soldering points with sealant. If the reception is bad, try to find a place where you can catch better first. If there are no positive changes, you can try replacing the cable. For ease of experiment, you can use ordinary telephone noodles. She's worth every penny. Solder the plug and the frame to it. Try with her. If it "catches" better, it's a bad cable. In principle, you can work on "noodles", but not for long - it will quickly become unusable. It is better, of course, to put a normal antenna cable.

To protect the junction of the cable and the antenna frame from atmospheric influences, the soldering points can be wrapped with ordinary electrical tape. But this is not a reliable way. If you remember, you can put on a few heat shrink tubes before soldering to insulate with their help. But the most reliable way is to fill everything with glue or sealant (they should not conduct current). As a "case" you can use covers for 5-6 liter water bottles, ordinary plastic covers for cans, etc. We make recesses in the right places - so that the frame “lays down” in them, do not forget about the cable outlet. Fill with sealing compound, wait until it seizes. Everything, a do-it-yourself TV antenna for receiving digital television is ready.

Homemade antenna double and triple square

This is a narrowband antenna, which is used when you need to receive a weak signal. It can even help if a weaker signal is "clogged" by a stronger one. The only drawback is that you need an exact orientation to the source. The same design can be done to receive digital television.

You can make five frames - for a more confident reception
It is undesirable to paint or varnish - reception worsens. This is possible only in close proximity to the transmitter.

The advantages of this design are that the reception will be confident even at a considerable distance from the repeater. Only it will be necessary to specifically find out the frequency of broadcasting, to withstand the dimensions of the frames and the matching device.

Construction and materials

Make it from tubes or wire:

1-5 TV channel of the MV range - tubes (copper, brass, aluminum) with a diameter of 10-20 mm;
6-12 TV channel of the MV range - tubes (copper, brass, aluminum) 8-15 mm;
UHF range - copper or brass wire with a diameter of 3-6 mm.

The double square antenna consists of two frames connected by two arrows - upper and lower. The smaller frame is a vibrator, the larger one is a reflector. An antenna consisting of three frames gives a greater gain. The third, smallest, square is called the director.

The upper arrow connects the middle of the frames, it can be made of metal. The lower one is made of insulating material (textolite, gettinax, wooden plank). Frames should be installed so that their centers (crossing points of the diagonals) are on the same straight line. And this line should be directed to the transmitter.

The active frame - the vibrator - has an open circuit. Its ends are screwed to a textolite plate measuring 30 * 60 mm. If frames are made from a tube, the edges are flattened, holes are made in them and the lower arrow is attached through them.

The mast for this antenna must be wooden. In any case, the upper part of it. Moreover, the wooden part should begin at a distance of at least 1.5 meters from the level of the antenna frames.

Dimensions

All dimensions for the manufacture of this TV antenna with your own hands are shown in the tables. The first table is for the meter range, the second is for the decimeter range.

In three-frame antennas, the distance between the ends of the vibrator (middle) frame is made larger - 50 mm. Other dimensions are given in the tables.

Connecting an active frame (vibrator) via a short-circuited loop

Since the frame is a symmetrical device, and you need to connect it to an unbalanced coaxial antenna cable, you need a matching device. In this case, a balancing short-circuited loop is usually used. It is made from pieces of antenna cable. The right segment is called the “loop”, the left one is called the “feeder”. A cable is attached to the junction of the feeder and the cable, which goes to the TV. The length of the segments is selected based on the wavelength of the received signal (see table).

A short piece of wire (loop) is cut at one end by removing the aluminum screen and twisting the braid into a tight bundle. Its center conductor can be cut to insulation, as it does not matter. Divide and feeder. Here, too, the aluminum screen is removed and the braid is twisted into a bundle, but the central conductor remains.

Further assembly goes like this:

The braid of the loop and the central conductor of the feeder are soldered to the left end of the active frame (vibrator).
The feeder braid is soldered to the right end of the vibrator.
The lower end of the loop (braid) is connected to the feeder braid using a rigid metal jumper (you can use a wire, just make sure that it makes good contact with the braid). In addition to the electrical connection, it also sets the distance between the sections of the matching device. Instead of a metal jumper, you can twist the braid of the lower part of the cable into a bundle (remove the insulation in this area, remove the screen, roll it into a bundle). To ensure good contact, solder the bundles together with low-melting solder.
The pieces of cable must be parallel. The distance between them is about 50 mm (some deviations are possible). To fix the distance, clamps made of a dielectric material are used. You can also attach a matching device to a textolite plate, for example.
The cable going to the TV is soldered to the bottom of the feeder. The braid is connected to the braid, the center conductor is connected to the center conductor. To reduce the number of connections, the feeder and cable to the TV can be made one. Only in the place where the feeder should end should the insulation be removed so that a jumper can be installed.

This matching device allows you to get rid of interference, a blurry contour, a second blurred image. It is especially useful at a great distance from the transmitter, when the signal will be clogged with interference.

Another variant of the triple square

In order not to connect a short-circuited loop, the triple square antenna vibrator is made elongated. In this case, you can connect the cable directly to the frame as shown in the figure. Only the height at which the antenna wire is soldered is determined in each case individually. After the antenna is assembled, “tests” are carried out. The cable is connected to the TV, the center conductor and the braid are moved up / down, achieving a better picture. In the position where the picture will be most clear, the antenna cable taps are soldered, the soldering points are isolated. The position can be any - from the bottom jumper to the transition to the frame.

Sometimes one antenna does not give the desired effect. The signal turns out to be a weak image - black and white. In this case, the standard solution is to install a TV signal amplifier.

The simplest antenna for giving - from metal cans

To make this television antenna, in addition to the cable, you will only need two aluminum or tin cans and a piece of wooden plank or plastic pipe. Banks must be metal. You can take beer aluminum, you can - tin. The main condition is that the walls are even (not ribbed).

Banks are washed and dried. The end of the coaxial wire is cut - by twisting the strands of the braid and cleaning the central core from insulation, two conductors are obtained. They are attached to banks. If you know how, you can solder. No - take two small self-tapping screws with flat caps (you can use “fleas” for drywall), twist a loop at the ends of the conductors, thread a self-tapping screw with a washer installed on it, screw it to the jar. Just before that, you need to clean the metal of the can - removing the plaque with fine-grained sandpaper.

Banks are fixed on the bar. The distance between them is selected individually - according to the best picture. You should not hope for a miracle - there will be one or two channels in normal quality, or maybe not ... It depends on the position of the repeater, the "cleanliness" of the corridor, how correctly the antenna is oriented ... But as an exit in an emergency - this is a great option.

A simple Wi-Fi antenna from a metal can

An antenna for receiving a Wi-Fi signal can also be made from improvised means - from a tin can. This do-it-yourself TV antenna can be assembled in half an hour. This is if everything is done slowly. The jar should be made of metal, with smooth walls. Tall and narrow cans are great. If you put a homemade antenna on the street, find a jar with a plastic lid (as in the photo). The cable is taken antenna, coaxial, with a resistance of 75 ohms.

In addition to the can and cable, you will also need:

radio frequency connector RF-N;
a piece of copper or brass wire 2 mm in diameter and 40 mm long;
cable with a socket suitable for a Wi-Fi card or adapter.

The Wi-Fi transmitters operate on the 2.4 GHz frequency with a wavelength of 124 mm. So, it is advisable to choose a jar such that its height is at least 3/4 of the wavelength. For this case, it is better that it be more than 93 mm. The diameter of the jar should be as close as possible to half the wavelength - 62 mm for a given channel. There may be some deviations, but the closer to the ideal, the better.

Dimensions and Assembly

When assembling, a hole is made in the bank. It must be placed exactly at the right point. Then the signal will be amplified several times. It depends on the diameter of the selected can. All parameters are given in the table. Measure exactly the diameter of your jar, find the right line, have all the right sizes.

D - diameter	Lower limit of attenuation	Upper damping limit	LG	1/4 LG	3/4 LG
73 mm	2407.236	3144.522	752.281	188.070	564.211
74 mm	2374.706	3102.028	534.688	133.672	401.016
75 mm	2343.043	3060.668	440.231	110.057	330.173
76 mm	2312.214	3020.396	384.708	96.177	288.531
77 mm	2282.185	2981.170	347.276	86.819	260.457
78 mm	2252.926	2942.950	319.958	79.989	239.968
79 mm	2224.408	2905.697	298.955	74.738	224.216
80 mm	2196.603	2869.376	282.204	070.551	211.653
81 mm	2169.485	2833.952	268.471	67.117	201.353
82 mm	2143.027	2799.391	256.972	64.243	192.729
83 mm	2117.208	2765.664	247.178	61.794	185.383
84 mm	2092.003	2732.739	238.719	59.679	179.039
85 mm	2067.391	2700.589	231.329	57.832	173.497
86 mm	2043.352	2669.187	224.810	56.202	168.607
87 mm	2019.865	2638.507	219.010	54.752	164.258
88 mm	1996.912	2608.524	213.813	53.453	160.360
89 mm	1974.475	2579.214	209.126	52.281	156.845
90 mm	1952.536	2550.556	204.876	51.219	153.657
91 mm	1931.080	2522.528	201.002	50.250	150.751
92 mm	1910.090	2495.110	197.456	49.364	148.092
93 mm	1889.551	2468.280	194.196	48.549	145.647
94 mm	1869.449	2442.022	191.188	47.797	143.391
95 mm	1849.771	2416.317	188.405	47.101	141.304
96 mm	1830.502	2391.147	185.821	46.455	139.365
97 mm	1811.631	2366.496	183.415	45.853	137.561
98 mm	1793.145	2342.348	181.169	45.292	135.877
99 mm	1775.033	2318.688	179.068	44.767	134.301

The procedure is as follows:

You can do without an RF connector, but with it everything is much simpler - it is easier to set the emitter vertically upwards, connect the cable that goes to the router (router) or Wi-Fi card.

When relaxing outside the city, sometimes, in addition to enjoying nature and fresh air, sometimes you want to watch your favorite TV series or an important football match. In contrast to the city, the coverage of villages with a high-quality television signal leaves much to be desired. In this situation, even the purchase of an antenna operating in a wide range of decimeter and meter waves does not guarantee a high-quality picture.

You can also try to assemble the antenna yourself, because a country house is the best place for experiments.

The simplest version of the antenna

As you can see in the photo, the antenna is the simplest wave receiver. For manufacturing, you will need two handsets and a television cable, as well as knowledge of the signal transmission range of the nearest television tower.

Typically, reception is carried out at frequencies from 50 to 230 MHz, forming twelve channels. For each of them, tubes of certain sizes are used. To receive a signal at a frequency of 50 MHz, the distance between the outer edges of the tubes must be within 271-276 cm. On channel 12, the same distance is 66 cm.

Information on the dependence of the length of blanks on the frequency of reception, as well as schemes of home-made antennas, can be easily found on similar thematic Internet resources.

To make an antenna in artisanal conditions, we present you a list of what you can make an antenna from:

Two tubes made of steel, aluminum or any other metal alloy with a diameter of 8 to 24 mm. They must be the same in diameter, material and wall thickness.
The presence of a television broadcasting cable, designed for a resistance of 75 ohms. The length of the wire is cut at the connection point, taking into account the margin for sagging of 50 cm.
Textolite blank or material from getinax (at least 5 mm thick).
Fixture for installation of pipes on the holder.
Bracket for the future antenna in the form of a metal pipe or corner. When installing the receiver at a low height, you can use a wooden stand.
Soldering kit, silicone fluid to prevent oxidation and electrical tape.

Assembly principle

The workpiece selected along the length is divided into two equal tubes, which are crimped on one side. The tubes are fixed at a distance of 6-7 cm from each other, and their ends are attached to the textolite blank with clamps. The resulting structure is fixed with a rod in a vertical position.

To connect the cable, it is necessary to lay a loop designed for a resistance of 75 ohms. The middle conductors of the cable are stripped and twisted with flattened ends of the tubes, and the braid is connected using a copper wire. The connection of the rest of the loop and the cable going to the output to the television device follows the same principle.

The resulting loop and the remaining length of the cable, in order to avoid interference, should be securely fastened to a vertical rack. The required antenna installation height is adjusted locally, observing the change in the signal.

beer can antenna

It is one of the most popular ideas for homemade television signal receivers. Instead of tubes, in the absence of material, you can use simple beer cans.

For the manufacture of such a television receiver, the following parts will be required:

two beer cans of 0.5 l;
wooden or plastic blank 50 cm long;
television cable RG-58;
soldering iron, flux for aluminum soldering and solder;

To make a receiver from beer cans, follow the instructions below:

Through the bottom of the can, in its center, a hole 5-6 mm in diameter is drilled.
We lay the cable through the hole in the bank and bring it out through the neck.
The bank is evenly fixed on the left side of the workpiece in a horizontal position.
We bring the cable through the neck to a distance of 5 cm, cut the insulation by 3 cm, remove the wire sheath by 1.5 cm and solder it to the surface of the can.
Solder the outgoing cable to the bottom of the second can.
Attach the second jar to the first at a minimum distance using tape or other sticky material.

At the other end of the cable, a connector is installed to enter the TV. This version of the antenna is also suitable for digital broadcasting. If the TV supports a popular format (DVB T2), or there is a set-top box suitable for an old TV, then the signal can be received from the nearest relay tower. In this case, it is necessary to know the location of the repeater, in the direction of which the antenna should be directed to search for a signal.

This scheme is suitable for the manufacture of an antenna designed to receive meter wave channels. Only instead of half-liter jars, use a liter container.

In case you do not own soldering, there is another way to connect. Two beer cans are attached at a minimum distance from the workpiece holding the entire structure. At the end of the cable, carefully remove the insulation by 3-5 cm. Twist the wire braid into a bundle and, shaping the eyelet, put it on the self-tapping screw.

In the same way, put the eyelet on the self-tapping screw at the second conductor. Then attach the wires, using self-tapping screws, to each bank. In terms of long-term contact retention, soldering is much better than mechanical fasteners. Before soldering, it is desirable to carry out tinning of the surface.

Fastening with self-tapping screws, although it is reliable, but when moisture gets on the antenna, the contacts of the home-made device are oxidized, which will lead to signal loss.