Drawing of a homemade TV antenna in electrical engineering. Homemade television antenna: for DVB and analog signal - theory, types, manufacturing

Today, almost all homes are connected to cable or satellite television, and almost all channels are in good quality. But what to do if you are just renting an apartment? This is where a homemade antenna for digital television will come to the rescue - as a reliable and inexpensive alternative to the factory one. Read on to see how it is done.

To make this device, you will have to use 550 by 70 mm plywood, several self-tapping screws, and a forty-centimeter copper wire 40 cm long (the central core is 4 mm in diameter).

The base of the product is a board. Next, cut 8 pieces of wire, the length of which is 375 mm, while they should be stripped in the center by 20-30 mm. This is necessary to ensure good contact in signal transmission.

Now, cut out 2 wires, the length of which is 220 mm and, based on the dimensions of the board, they should be cleaned where the connections will be. After this, the remaining wires (eight pieces) need to be bent so that they acquire a “V” shape.

An antenna for digital television is absolutely no different from a regular decimeter antenna.

First, you should start purchasing a special plug, after which it should connect the antenna and cable. This is easy enough. Using a benchtop soldering iron, the plug is attached to the wire. This cable is installed over the bottom connection of the instrument. At this stage, the production of the antenna can be considered completed. It is already ready to be turned on.

An antenna for digital television is absolutely no different from a regular decimeter antenna.

The second method of making a digital television antenna from cans

Here, we will not use a ready-made device as a basis. The device will be completely assembled from available materials. A homemade antenna for digital television is made using:

• wooden trempel;
• adhesive tape or tape;
• soldering iron;
• two tin cans;
• several meters of wire (about 3-5 m);
• plugs.

First, you need to modify the standard television cable. To do this, you need to slightly cut its soft shell. Under the shell you will see a silvery “foil”. This material covers the cable in several layers. For this reason, in order to see the wire itself, you will have to cut about 10 cm from the edge. After this, you should twist the foil layer in order to make a sample of its middle layer by about 10 mm. The reverse end of the cord is equipped with a plug used to connect to the TV.

We're done with the cable, the banks are next. If we talk about sizes, then a tin container with a volume of 750-1000 mm is enough to receive a digital signal. The end of the wire with the “foil” is attached to one can (otherwise, the display of channels will be incorrect). The cable core is screwed onto the second can. It is preferable to connect the cable and cans by soldering. If the wire is secured with tape, most likely the product will not work.

The only option for using such material is when the cans are installed on top of the trempel. However, here too one cannot deviate from the technology of application. Namely, the arrangement of the cans should form a straight line. Tin containers should be located at a distance of about 7-8 cm from one another.

That's all, the homemade antenna for digital television is ready. Now you can start searching for a suitable signal and securing your device. Such an antenna will allow you to view several channels, up to 10-15, if the signal is not password protected.

Video: homemade antenna for digital television

Since 2009, television broadcasting has reached new, previously unattainable heights. Namely, the transition to a qualitatively new level of broadcasting in digital format. Four years later, the second generation of this method saw the light, which received the name dvb t2. This technology had the advantage of single-frequency transmission. That is, many channels were transmitted in one band, where each individual program had its own slot. Therefore, the antenna for digital TV has gained new milestones in popularity.

The fundamental difference of the new method allowed companies to significantly reduce costs. This also applies to the factor of direct organization of operation, as well as scheduled technical maintenance. Unfortunately, at the moment there are also disadvantages, yet progress is not at its final point.

The main problem is that to receive a digital signal, you need to avoid interference. And the transmission itself must be of high quality, that is, geolocation plays a role. As a result, residents of rural areas who are quite far from the source are often unable to properly receive a digital television signal. At the same time, the megalopolis has its own problems. Huge masses of modern buildings, constructed of reinforced concrete, serve as a kind of screens, blocking the entry of decimeter waves. As a result, in some cases, catching the transmission becomes problematic.

Way out of this situation

A simple device - an antenna for digital television - can significantly help with this problem. Just a couple of decades ago, almost every home was equipped with a TV with this kind of device. Moreover, they usually did it on their own, it did not cause any difficulties. In our time, the need has decreased somewhat, but has not disappeared. Not many people know how to make an antenna for digital television with their own hands. After all, analogues and finished goods appeared.

Unfortunately, their prices can be quite steep. Good products start at a price of three thousand rubles and above. Considering the fact that you can make dvb t2 with your own hands in a short period of time, the savings become very, very decent.

But you must be very interested in one question: will the simplest self-assembled structure be as effective as a purchased one? To answer the question, it is necessary to understand the operating principle of decimeter waves and the modern digital television system in the dvb t2 range. The meaning is simple, the signal is either caught or not. There is no middle level.

It is impossible to catch a transmission with interference, poor quality, or disappearing. Either "yes" or "no". Thus, in most cases, a homemade product is not at all inferior to a paid plate. Of course, its acceptance rate is worse; after all, it is performed by non-professionals in makeshift conditions. However, this does not matter if you were able to catch the signal in principle. If it exists, it will be one hundred percent high quality.

Often, when looking through the answers to the question - how to make an antenna for digital TV dvb t2, you will notice that on the network it is sometimes called satellite. This is a key mistake. Because she has nothing to do with this. After all, this TV broadcasting technique uses a satellite that is located high up, and accordingly produces a different type of channel. Whereas in our case we are talking about a horizontal channel.

Types and methods of creation

An indoor antenna is a heterogeneous concept. There are many types that differ both in design and functionality. The most common option is the figure eight. At the same time, this is the simplest antenna for digital TV dvb t2, which you can make yourself. The name is based on visual similarity. That is, the external structure is a figure eight. It is made from twisted cable, respectively. This kind of product, or rather the principle itself, the methodology, is used everywhere in various industries.

So, we need the material itself. It is no secret that the most active substance when it comes to signal reception is copper. Therefore, it is logical to choose copper wire as a production material. True, in some cases it is permissible to use aluminum.

Sizes are not strictly limited. It is still impossible to calculate ideal dimensions at home, even knowing the broadcast frequency. Therefore, you just need to adhere to some frameworks, norms, nothing more. The height of our figure eight will be equal to 140 mm, while the width tends to 130 mm. Accordingly, even if you decide to increase or decrease the dimensions for some reason, you should not forget about these proportions and maintain them in any case. This is an important design aspect.

When calculating the total length of copper wire required to create a dvb t2 antenna, do not forget about the loop factor. That is, do not just calculate the length of the sides of the figure eight, otherwise the segment may turn out to be shorter. It’s better not to waste time on trifles and take with reserve. After you “roll” the figure eight itself, you need to solder the connections to improve performance properties. The cable must be stripped of its outer sheath, of course.

How to remove the cable sheath? This is a fairly simple procedure that does not require any skills. All you need is a sharp tool. A knife or paper cutter will do. The main thing in the stripping process is not to damage the copper wire itself, which is theoretically possible with excessive zeal.

After we have soldered the figure eight, the fastening points must be sealed using ordinary rubber glue.
The resulting design is reliable and easy to use. It can be installed in literally an hour, provided you have ready-made material and tools. And, as you remember, it saves from three thousand rubles and more. Not bad?
But the figure eight is not the only antenna for digital TV that you can make with your own hands. There are several other very interesting options.

An antenna for a long-range signal, in most cases, is used on the basis of squares. This is a double square, triple or simply “square” antenna. All these are various modifications and improvements of the same prototype. It is difficult to understand which one works better. Most likely it depends on the type of terrain. However, it has been proven that for UHF signals such a design is an almost ideal solution. Especially when it comes to remote areas. Transmission interception occurs at a distance of up to ten kilometers without additional means. But if there is a need for longer distances, then the device can simply be equipped with an amplifier, increasing the reception level by a colossal percentage.

For the construction you will need aluminum wire of round cross-section. It is not difficult to find; it is unlikely that someone at home does not have the remains of such material lying around. It is necessary to build two, four or six squares from it, depending on what specific type of antenna for digital television dvb t2 we want to make with our own hands. Next, you need to create a transformer to stabilize the signals. It is performed as a tap. The last step will be final soldering and application of copper wire to the surface of the structure.

It is worth noting that by creating an antenna for T2 with our own hands, we do not solve the problem with a poor signal in one fell swoop. Still, a simple product can only work if there is a broadcasting tower nearby. It will improve the flow of waves and receive images, but, alas, it will not be able to work miracles. If there is no tower as such within the area, it is located very far away, then any self-mounted structure will still have to be additionally equipped with an amplifier.

A little about the amplifier

What is this device? Why is it needed? It is logical to assume that it amplifies the signal, redirecting it to our antenna. You can also make it yourself, but we’ll talk about that another time. It can be bought in specialized stores. It's not as expensive as some satellite dish, so it's quite possible to fork out the extra cash without seriously damaging your budget.

There are also some nuances in installing an amplifier, safety precautions, so to speak. Firstly, the installation is carried out at a distance of up to three meters from the main source of reception. That is, from our homemade product. It will only amplify the signal at this distance, place it somewhere behind the house, it won’t work in a barn, keep in mind. Secondly, it is important to understand the rationale for using an amplifier. If the signal itself is very stable, then you can get by with just a television antenna. Additional installation of an amplifier will result in an excess of signal power. This will cause deterioration in transmission quality, floating images, and unpleasant interference. So, you need to calculate in advance how much you need to improve the signal, how far away the broadcasting tower is.

As you can see, there is nothing supernatural in the design and installation of such products. You can get a high-quality image on your TV screen without additional financial investments, spending a little of your personal time.

Antenna is a radio device designed to receive and emit electromagnetic waves through the air.

To watch TV shows in high quality, it is best to connect your TV to a cable network. In conditions of great distance from the city, an alternative is a satellite television antenna (dish). But there are situations when these options cannot be used. In this case, you can make a simple television antenna from scrap material with your own hands.

If you live at a distance from the direct line of sight from a television tower, then a simple indoor television antenna, the design of which is presented in this article, is quite suitable for receiving analogue and digital television signals. This indoor television antenna is designed to receive television broadcasts in the UHF range (470-790 MHz), but with a sufficiently powerful signal, it also satisfactorily receives a meter range signal (48.5-100 MHz, 174-230 MHz).

The design of a television antenna is simple and does not require special knowledge to repeat. To make it you will need 70 cm of copper wire with a diameter of 2-3 mm, a piece of double-sided fiberglass sheet, 1.5 m of coaxial television cable with a characteristic impedance of 75 Ohms and an F-plug.

Instructions for making a UHF television antenna

The first thing you need to do is select a piece of copper wire with a diameter of 2-3 mm and a length of 70 cm. For these purposes, a single-core copper wire is well suited for laying electrical wiring. If there are several conductors in the cable, then you need to carefully cut off one conductor along the groove, being careful not to damage the insulation. It is not needed for the antenna to work; the insulation is left only for aesthetic appearance. An aluminum wire will also work, but then it will have to be connected to the contacts of the matching transformer board using a threaded connection. Please note that the nut should not touch the shielding foil of the transformer; if it does, then you need to lay an insulating washer or trim the foil.

If you use a wire without insulation, you can put a vinyl chloride tube on it for beauty.

Next, the wire needs to be bent into a ring with a diameter of approximately 220 mm. High precision is not needed here. A paint bucket holder or any other round container of suitable size works well for this.

When the antenna ring is ready, you can begin manufacturing the printed circuit board for the matching transformer.

The printed circuit board is made of fiberglass or getinax, foil-coated on both sides, 1.5 mm thick, 25x30 mm in size. The photo shows the appearance of the transformer printed circuit board on both sides.

This photo shows a negative of the antenna circuit board. The width of the current-carrying tracks is 1 mm, the distance between the tracks is 1.5 mm. Antenna board size 25×30 mm.

If it is not possible to make a printed circuit board for the manufacture of an antenna using a chemical method, then it can be made mechanically. To do this, you need to remove unnecessary sections of the foil, leaving only the contact pads, and lay out the current-carrying paths from copper wire with a diameter of 0.3-0.5 mm, gluing it to the board, for example, with “Moment” glue.

To give an aesthetic appearance and increase the mechanical strength of the antenna, the transformer is placed in a plastic or metal box, in which holes for the ring and antenna cable are pre-drilled.

When all the parts are prepared, you can begin assembling the antenna. The ends of the ring, pre-tinned with solder, are inserted into the box and bent at a right angle at a distance of 3 mm. Next, the ends are inserted into the printed circuit board of the antenna transformer and soldered with solder using a soldering iron.

The antenna board is rotated to the bottom of the box and secured with an M3 screw and nut.

A television cable with a characteristic impedance of 75 Ohms, 1.5-1.8 m long, is threaded into the hole in the box. You can learn about choosing the type of cable, cutting it, and installing the F-connector from the article “Connecting a TV to an antenna cable.” You first need to install a television F-connector on one end of it, and cut the other one and solder its ends onto a printed circuit board. The center core of the cable is soldered directly to the right end of the ring, and the braided shielding is soldered directly to the foil of the antenna board.

For reliable operation of the antenna, you need to solder or attach the cable in the following order. First, the shielding braid is soldered, then you need to pull the cable well to remove the slack, and only then solder the central core. In this case, when moving the antenna to find a place in the room with the maximum signal level and stretch the cable, the central core will not break.

If the cable screen is made of aluminum foil, then it can be pressed to the foil of the board using a metal clamp placed on a screw and secured with a nut. The technology for attaching the screen with a clamp is discussed in the article “How to make a TV crab with your own hands.”

All that remains is to close the box with a lid, insert the connector into the TV and tune the channels to the desired programs. In order to ensure image quality with minimal noise, you need to move the antenna around the room to find a place with the maximum television signal.

How to replace the matching printed circuit board
cable loop

The use of a printed circuit board to match the antenna with a coaxial cable allows you to make the antenna more compact.

If there is no desire or opportunity to make a printed circuit board, then without losing the quality of the antenna’s performance, it can be replaced with a loop, which I also call a U-elbow, which is a section of television cable bent in half, connected to the antenna according to the circuit, as in the photograph below.

To make a matching loop, you need to take a piece of television cable 162 mm long, with which the antenna will be connected to the TV. Cut its ends and solder the central cores to the ends of the ring, the distance between which should be 60 mm. Next, the end of the cable going to the TV is cut and its central core is soldered to either end of the antenna ring, and the shielding wire is connected to the shielding wires of the loop, as shown in the photograph.

When soldering the shielding braid, care must be taken so that the insulation of the central core does not melt and the braid does not come into contact with it.

The photo shows the soldering of a cable to an antenna ring made of aluminum wire with a diameter of 3 mm. Since it is difficult to solder wires to aluminum with soft solder, the ends of the ring were slightly flattened, holes were drilled in them, and brass petals were secured with rivets. The central cores of the cable are soldered securely to the petals.

Digital technologies are already sweeping the country, and many are trying to buy TVs that support this format. But if this is not possible, there is another way out - making the antenna yourself. With a little theoretical and practical training, almost anyone can do this.

How to make it yourself dvb - antenna

Digital technologies involve the transmission of images and sound through digital video encodings. It differs from analog equipment in that interference practically does not interfere with the signal, so it arrives at the receiver device with minimal losses.

Today there are already 20 channels of this type. To be able to connect to it, it is not necessary to have special equipment. In this case, we are talking about receiving a high-quality signal, for which it will be enough to have a television cable. It is also called coaxial.

To receive a digital signal you need a decimeter antenna. It’s very easy to do it yourself – you only need an antenna cable. But the main thing is not to make mistakes in the calculations. The procedure is as follows:

1. Take a 30 cm antenna cable and connectors (male/female and F-connector).
2. Prepare wire cutters, a tape measure (at worst, a ruler), a knife and a calculator.
3. Next you will need a computer with an Internet connection. On the digital television website, find a coverage map of dvb channels, determine which one is closest to your city. There is a search form there.
4. Find a station, find out the detailed frequencies on which it operates.
5. Several channels and frequencies for them may be indicated there. The antenna length is calculated by dividing 7500 by the frequency. For example, if the channel frequency is 754 MHz, the result is 7500:754=9.94. Thus, it turns out that a homemade dvb antenna should be about 10 cm long. If there are several stations, the average length is determined.
   
6. You need to attach the F-connector to the end of the antenna wire yourself. It's easy - the cable is stripped and the connector is screwed on top. It is necessary that there is a central wire in the middle, and the foil with the wires is at the attachment point.
   
7. Then move a few centimeters away from the connector, then measure another 10 and cut off what is unnecessary.
   
8. The plastic insulation and “screen” (wires with foil) are removed from the remaining cable, and the antenna is ready. Now the question is connecting it.
   

There is another manufacturing method, which is also simple and requires a minimum of available materials: a board approximately 550x70 mm, self-tapping screws, copper wire (40 cm in length, central core 4 mm in diameter). A blank is made from wood. 8 wires, each 375 mm long, stripped in the middle by approximately 30 mm, thus ensuring good conditions for signal reception. Then you need to cut two wires 220 mm long, and clean the joints according to the size of the board. The remaining wires are bent in a “V” shape.

A special plug connects the antenna and cable (the plug can be purchased separately). The wire is secured to the plug with a tabletop soldering iron. The homemade antenna is ready.

The third method will require:

A small cut is made in the cable sheath, 10 cm from the edge, twist the covering “foil”, cutting off the middle layer by 10 mm.

At the opposite end, install a plug to connect to the TV. A cable is attached to one of the cans, the middle of the wire is screwed to the second, and the best method is soldering; tape is unreliable.

Fix the cans in a straight line on the trempel at a distance of approximately 7-8 cm. Now the device needs to be fixed in the place where the television signal is most clearly received. True, such a device will not be able to pick up many channels, maximum 10.

Feature and dvb connections -antennas

The difficulty may be to find a point in the apartment where the digital television signal would be best received.
Then sometimes problems arise with inserting the antenna into the set-top box or TV. Options - for example, first insert an extension cord into the console, and then insert the cable into it. At the same time, it should not disturb anyone; ideally, it is generally better to hide it somehow.

Homemade structures of this kind, apparently, do not take much time. So for about 100-400 rubles you can build a digital television device of the dvb standard with your own hands. According to reviews, it works even better than various expensive telescopic devices. True, only for digital TV of one frequency. Not suitable for analog. A high-quality image can be obtained provided that a powerful transmitting station is located no further than 30 km. True, sometimes the distance is reduced even to the range of 5-10 km.

Features of dvb reception

There are also homemade ways to strengthen the signal, especially if the terrain or a large distance from the transmitter (50-100 km) does not allow you to get good digital TV reception. For a high-altitude external antenna, you will need to install a board, and any two-transistor one with a low or medium gain will do. Powerful amplifiers are not required in this case, since the signal is quite distorted.

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 arrived at the dacha, have already prepared for a vacation, and again the same situation - not a single channel works. 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 look at the simplest creation options, which will require a minimum of available tools and time.

Idea #1 – Use beer cans!

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

To make a TV antenna 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 fixation of contacts), availability is optional;
• screwdriver;
• wooden trempel;
• electrical tape or tape.

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

In order to make a homemade antenna from cans, you need to complete the following steps:

1. We prepare the cable. First, at a distance of 10 cm from the edge, you need to make an incision and remove part of the top layer of insulation. Having opened access to the screen, we collapse it into one turn. After this, we cut off the middle insulating layer, exposing the thin copper core of the cable. As for the second end of the conductor, there should be a regular plug there.
2. We prepare the jars. There will also be no difficulties with containers that will act as signal receivers. First you need to choose the optimal dimensions of beer cans. It is better to use liter ones, but if these are not available, containers with a volume of 0.5 and 0.75 liters will do a good job.
3. Let's make contacts. At this stage, the twisted cable screen is attached to one can, and the copper core itself is attached to the other. Fixation is carried out with bedbugs using a screwdriver. In order to make the picture quality on the TV screen higher (signal transmission quality), it is recommended to fix the wire not only with clamps, but also with a soldering iron (tack a little). The result should look like this:
   
4. We assemble a homemade antenna for a TV. The signal receiver is ready, now we are making a supporting structure, which is the trempel. Using electrical tape, we fix the containers to the trempel (as shown in the photo). We draw your attention to the fact that the banks must be strictly on the same straight line, otherwise the homemade product will not work as we would like.
   
5. Setting up an antenna for the TV. Now you need to experiment with the optimal distance between the cans, as well as where to hang 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 quite simple and does not represent anything 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 banks can be made larger or smaller.

Idea No. 2 – Use wire

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

All you need for production is:

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

So, to make your own TV antenna from copper wire, you need to complete the following steps:

Please note that in the photo examples, both the amplifier, 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 No. 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 higher quality picture, because The signal range can reach up to 490 MHz. The only part that is unlikely to be found among household items is a matching transformer from 300 to 75 Ohms. You will need to buy it in advance if you decide to make your own TV antenna as an experiment and improve your skills. Although there are instructions for making a homemade transformer, you can find and use it.

Materials you will need:

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

Having prepared all this school kit, let's get down to business!

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

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

After this, you need to make a reflector with dimensions of 35 * 32.5 cm (height and width). Cover one side with foil.

In the middle we cut out two identical rectangles, which are necessary in order to completely assemble the signal catcher of a homemade antenna for a 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 onto the rectangle, and when the cardboard homemade product hardens, we drill holes for the television cable.

We connect the transformer and insert the cable into the plug. A more powerful TV antenna is ready for use! It should also be noted that this homemade version is only suitable for indoor use, because paper will quickly deteriorate outdoors.

Another option for a powerful device made at home:

Idea No. 4 – Apartment option

There is another way to make a powerful antenna for a TV from improvised materials, which is suitable for both outdoor and indoor use.

To make the device you will need the following materials and tools:

• 4-meter copper wire, cross-section 4 mm2;
• board of arbitrary thickness, 55 cm long and 7 cm wide;
• wood screws;
• ruler or tape measure;
• a 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 in the appropriate fastening points.

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

In the middle of each of the 37.5 cm sections, the insulation must be removed (as shown in the picture).

We cut off 2 more copper wire sections 22 cm long and roughly divide them into 3 equal parts, again removing the insulation at the inflection points.

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

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

This concludes the manufacturing process. We select a suitable location and install the device.

So we have provided the simplest 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 wire. Among other available means, copper tubes, aluminum disks and electrodes are often used. The advantage of the options we have listed is that you can quickly make such antennas for a TV with your own hands, without spending the whole evening on it.

Related materials:

Visual video instructions for creating a simple antenna from cans

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

HDTV antenna made from improvised means

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