Homemade antenna for wi fi modem. Do-it-yourself Wi-Fi antenna - what could be easier

I will show you how to assemble powerful antenna for receiving Wi-Fi, capable of receiving a signal at a distance of many kilometers, but at the same time light and easy to assemble. Having crossed two popular antennas, a wave channel and a pouch antenna, I had the idea to create a Wi-Fi gun.

You can make this antenna from any sheet of metal. I used 0.3mm thick copper foil because it is easy to cut with scissors.
The details of our antenna will be mounted on a hairpin, we need to cut out 7 disks with a hole in the middle.

To do this, you need to place, punch or drill seven holes, and only then circulate the circle. If you do the opposite, then the drill may go to the side, but for us it is important that the hole is exactly in the middle.

We scratch out the circle according to the dimensions indicated in the diagram and cut out our disks.

Picture 1.

You need to do it as accurately as possible, the deviation is only a millimeter and it will not work like that. The thickness of the metal and the diameter of the stud have almost no effect on the operation of our blaster and can be anything. It turns out such circles (See Fig. 1) and after all the details are cut out, it remains for us to wind them onto the hairpin, observing the size of the gaps between them.

This irradiator is assembled easily, like a constructor. We install the second plate of our
blaster at a distance as indicated on our diagram - 30 millimeters, by tightening the nuts we select exactly our 30 millimeters.

On the last two disks you need to make a hole for the wire. Our blaster is ready. Now it remains to connect it to our device. At the beginning, it will be a USB modem, then we will connect it to a smartphone, and finally, to a router in order to distribute the Internet through our WI-FI gun.

To connect to a Wi-Fi whistle, you need to carefully disassemble the antenna so as not to damage the wire. We tin the soldering points and solder the wire to the extreme large disk, and the central core to the next one after it. We mount our gun on the bracket so that it is convenient to aim at the victim's router.

The gun catches the net even at a distance of 500 meters. Wi-Fi gun materials are not expensive and available to everyone.

Instructions for making a "double" Bi-Quad (double figure eight) W-LAN antenna - 2.4 Ghz antennas for wi-fi.

"Double Eight" is a continuation of Bi-Quad, the gain of which is 2 dB higher, i.e. is approximately 12 dB. When building, pay attention to the fact that the copper wires do not touch at the intersections. After construction, it is advisable to varnish the "double eight" to avoid oxidation / corrosion. How important it is to maintain a distance of 15 mm between the reflector and the copper wire is evidenced by the two photographs below:

In order to avoid questions (there were in the first post), consider the construction of an antenna with a circular diagram, in this case something around 270 °.

First, a pipe with a diameter of 70 mm and a height of approx. 100 mm. Then bend out copper wire straight 6-element Quad and using, for example, a bottle, give it a corresponding, curved shape. I repeat for those who do not read very carefully: the distance from the copper wire to the reflector in a circle should be 15 mm! It is important that the crossed wires do not touch each other!

Of course, this is not the only correct option for building such an antenna. The pie antenna can be made larger,

In this case, signal loss in antenna cable will be kept to a minimum.

Ideally, it should look a little different, something like this:

but this is not so important, the main thing is that you can repeat the dimensions by printing. For bending "double eight" - extreme squares are not used. Those who do not have a printer use the following pattern to make a frame: the dimensions are given for a wire with a diameter of 2.5 mm

"Triple Eight" - another continuation of the "Double Eight", the gain coefficient of the "Triple Eight" can be 14 dB or a little more. This is how the painted "triple eight" looks like, in general, not bad:

For beginners! Please note that the posts supporting the antenna at a distance of 15 mm from the reflector must be made of dielectric material!

The "double eight" and the pie antenna discussed above can be mounted together in one housing:

From another.

The antenna is closed. For the manufacture of the protective case, a piece of plastic pipe with a diameter of 125 mm was used, which is used in plumbing, the cover is made of 2 cm plastic. The fixing top nut is made of plastic. You can paint in any color.

Decided to make an antenna for WiFi... There are many options, netizens are looking for new ways. Probably because there are a myriad of life situations, each solution is powerless to lay out the network. Today we propose to consider a couple of methods for improving reception / transmission. Atypical solutions will be considered, the design process of Kharchenko's antenna has been described repeatedly. According to the designer's idea, dated back to the 70s of the last century, in a modernized version. Would you like to make your own WiFi antenna? Better read the review below! Let's get started.

Increasing WiFi Antenna Gain

With the help of beer cans, you will assemble an antenna for receiving the MV band (the ubiquitous Channel One), an excellent reflector of an arbitrary frequency. A parabolic surface has one interesting property:

Rays coming from any direction are reflected, collected by the focal plane. If you aim the product at a broadcast point, the lines will intersect in focus.

The Internet was flooded with refinements of factory modems, antennas in order to obtain additional amplification. I didn't pay a penny. Let's look at ways to save money. Most external WiFi modem antennas are omnidirectional. In the factory modem, antennas 2-3 (usually inside), can be divided as follows:

1. The presence of an external / internal antenna.
2. The presence of several internal antennas.
3. Multiple outdoor antennas.

It is clear that most modems come as standard, the uninitiated ask the question: what gives the number of antennas? The answer is simple: better reception, transmission. The connection is vertical polarization. The vector rotates, the signal disappears altogether. An antenna with circular polarization will fix the matter, it will receive no worse, it will not fall into dependence on the direction of the electric field.

Homemade antenna

Today we are interested in two surfaces:

• A paraboloid of revolution is obtained if the ordinary graph Y \u003d X 2 is rotated around the axis of symmetry (in this case, the ordinate). Rays coming from the side of the concave part will be collected by the focal plane. Using the principle, work satellite dishes. If you take a ready-made, arbitrary radius, make something similar with your own hands from paper, epoxy, foil, you get a practical device for enhancing reception.
• When whip antennas you can use a fold surface. A purchased sheet of thin steel is customized according to the pattern - we'll talk below. The method is widely discussed on the Internet, a semicircle is used instead of a parabola, a tin is taken from a beer can. We see the minus: the two lines coincide approximately at the very beginning of the x-axis. Accurate focusing is not possible, the gain drops.

Let's see why the WiFi antenna starts to receive better when surrounded by a reflector. In the YouTube video, ValeraZik says: some pins, being covered from one side with the palm of your hand, receive better (any channel), part of the radiation is reflected by the hand. Not true. If we take a master of kung fu (the way of the blocking fist), the hand will be like a steel hand, the right hand of other people, as well as the Shui, will not be able to reflect anything.

The hand extinguishes the radiation coming from other directions. Man-made interference, natural sources. As a result, signal quality is inexorably improved. Sometimes noticeable to the naked ear, in the case of long antennas it may not play a role.

Consider the example of human hearing. Lor quietly says numbers, trying to hear, at the other end of the room they are constantly chatting. Let's say they fenced off interference with a partition, a wall of a sound insulator, of course, necessary information will be perceived more clearly. If the hand is replaced by a metal grounded screen, the situation will change radically. The wall reflects extra waves back, useful information will concentrate at the right point. Of course, if the envelope of the figure is chosen correctly.

Use of a parabolic WiFi antenna

It happens that the points of broadcasting, receiving in line of sight, are significantly removed. Firstly, factory-made, home-made log-periodic antennas, wave channels will come in handy, and they act witty. WiFi at 5 GHz coincides with the frequency of the satellite broadcasting band C. There is a topic at forumru.tele-satinfo.ru/index.php?topic=70121.0, showing how to convert the converter from receiving to transmitting a signal. Of course, the experiment is not for beginners, but, having received a successful alignment, we catch space broadcasting, all the more so we will receive it from Earth.

Now let's remember that it is the C range that is less afraid of fogs, rains, and other whims of nature. It is necessary to organize a bidirectional channel. There is a lot about the receiving part, it is written in detail here cqham.ru/ao40_equip.htm. It is proposed to subordinate MMDS converters to the purposes of fishing (cable broadcasting on the air, there is no way to lay a network underground, on the surface). The difference with WiFi in the range is 100 MHz, the author at the specified link discusses how to properly convert MMDS to WiFi converters. In more detail, a slightly different problem is being solved, for our case the solution is suitable (in the review, the author is trying to establish communication at the WiFi frequency with the AO-40 amateur radio satellite).

The topic of a bidirectional channel is discussed. A helical antenna is used for transmission, the construction of which (with your own hands) was discussed in the section. Equally nuanced device radiation pattern. It can be seen from the text of the article: a factory plate is suitable for the purposes of reception. Suitable for complementing the functionality of an already standing one (NTV +). Discussed how to properly adjust the WiFi equipment. Let us briefly recall that there is no need to touch the plate itself, simply, based on the laws of optics (the angle of incidence is equal to the angle of reflection), estimate at what point of the focal plane it will be wifi modem, antenna.

Mini antenna with reflector

A swarm of converters has stuck around the multifeed, add a receiver there. The orbit is projected onto the focal plane along one arc of large diameter, the point of location of the best WiFi reception depends on the coordinates of the location of the transmitter, relative to the dish.

We understand that links to forums are incapable of acting as a reliable source. Firstly, readers can search Yandex for how to do technological operations correctly, and secondly, they can ask the administrator to post a topic. Then we will do the work. We hope readers understand, realize the possibility of using satellite equipment for terrestrial communications (MMDS).

Make a Beer Can Screen for a WiFi Antenna

Sometimes it is not possible to make a WiFi antenna with your own hands. the best option, it is easier to re-equip an existing one. Consider a common case of limiting the broadcast area of ​​an access point. If you cover some WiFi antennas with your hand, the reception quality will improve, you will not sit all year round! For those who want to solve the problem, we give the name of the program - Inssider to help. Signal level meter with which you can find the best antenna, create a suitable screen, point the device in azimuth. Actually, start with this, then design / buy.

ZikValera in the video demonstrates a comparison of antennas, factory and own assembly. Those who wish to spend 20 minutes contemplating, we send them to watch, we bring others to the conclusion: a directional bi-square shows itself better, a non-directional “clover” with versatile polarization. You can evaluate the best factory model. But it's not about making a directional WiFi antenna. We want to show you how simple methods improve existing ones.

How to make an antenna for WiFi yourself, modify it to improve quality. Make a beer screen from a can, put the pin in focus. It is easier to do, being too lazy to write out the equation of an ellipse from the analytical geometry, to place the antenna in the focus of the figure. ZikValera tried to make optically by eye. I considered the focus to be the position at which the reflection of the antenna "spreads" to the maximum along the inside of the can. The authors have given a scientific approach. We add that when visually assessing, you need to look from afar - so that the rays of vision are parallel to each other - this is how the wave front behaves during real reception. So you can make an omnidirectional WiFi antenna directional, at the same time increase the gain.

Any antediluvian equipment with a skillful approach turns into the right one. It's funny to see landfills littered with plastic window frames. The picture shows the inability of society to fully use resources.

AT modern world widespread wireless network to which almost every house is connected. It happens that in a building of 2-3 floors, the signal in some rooms is weak or completely absent. One of the reasons for this situation is an incorrectly selected antenna for a device such as a router. On the this moment There is a wide range of these devices. An antenna for a router with your own hands can also be made, but this requires certain skills and knowledge, which we will consider below and get acquainted with how the system itself works.

How does an antenna amplify a signal?

The antenna is a passive amplifier, that is, it does not use external energy to amplify the signal. Amplification of the signal occurs due to the fact that the propagation of radio waves in space is redistributed. A classic rod-shaped antenna is capable of emitting a circular signal that has approximately the same power in all directions. The further away from the transmitter, the worse the signal becomes. If necessary, redistribution of the antenna radiation is available, which allows you to amplify the signal in a particular direction, weakening it in others.

There are many software methods, allowing you to enhance the signal transmission of wi fi antennas. The methods are as follows:

• Use WPA/WPA 2 protocol;
• Reduce the number of devices requiring the use of MAC addressing;
• Hide the name of the wireless network.

The legacy security protocol (WPA) makes the network not only less secure, but also slower. You need to change the protocol to WPA 2, which is done in the router settings section. It is also possible to significantly increase the power of the device by limiting the number of supporting devices. As for the MAC addresses themselves, these are identifiers. It is not recommended to leave the network open, since its quality directly depends on the number of connected devices (and if Wi-Fi is available, then everyone will use it). To hide the name, uncheck the "enable SSID broadcast" checkbox in the setup menu).

Types of WiFi antennas

WiFi is a technology that is only capable of normal functionality with "line of sight". The wireless signal is easily lost among obstacles such as cabinets, walls, mirrors, and so on. Therefore, if you want the network to work stably, you need to carefully consider the issue of choosing an antenna for a wi fi router.

There are two types of WiFi antenna: directional and omnidirectional (internal and external). Modern wireless networks are usually based on omnidirectional antennas. Their task is to evenly distribute the signal over the radius of action. Often, such devices have the form of a conventional pin that propagates a signal in a plane perpendicular to its axis.

Important! The omnidirectional Wi-Fi antenna is installed only in a vertical position. This provides the maximum coverage of the wireless network.

In some cases, coverage of a large area is required, such as in a manufacturing facility. This is easily achieved with an outdoor omnidirectional wifi antenna with a gain of 8 dB installed on the central building. The transmission radius of a powerful device is 600 meters.

With the help of directed wifi antennas the network is organized according to the "point-to-point" type. This device does its job perfectly if you need to connect to only one access point or one computer.

Let's consider an example of work. Such an antenna is able to "pierce" the walls in the room. A panel type of device is often used, which is a flat rectangle that transmits radio waves in one direction. As for the gain, it sometimes reaches 6 dB. If it is necessary to transmit a signal, for example, to a neighboring house, it is recommended to install an external antenna having a cylindrical shape. It is mounted in a horizontal position, as it directionally transmits a signal in the direction where the receiver is located. In this case, the gain reaches 18 dB.

There are also parabolic antennas that transmit a wireless network signal between similar devices over a distance of several kilometers. Such devices are relevant if signal transmission is required over a distance of more than 100 meters. The gain of parabolic antennas reaches 24 dB.

How to install an external antenna for a router

The first thing to figure out is where the router should be. After all, if there are obstacles in its path, then the reception signal is weakened. Here it should be understood that each obstacle in its own way worsens the quality of reception. For example, a concrete wall is much “thicker” for a router than a wooden one.

In a word, for effective signal propagation, it is necessary to install the router in such a way that there are as few obstacles as possible in its path. The most suitable place is an elevation in the center of an apartment or house ( omnidirectional antenna for WiFi). If directional is used, then it is logical to direct it to the area where stable and high-speed Internet is required most often. The same goes for outdoor devices. It is recommended to follow the updates of the router - firmware. It is better that the latter is used, correcting certain disadvantages of the work. Also, experts advise not to place the adapter near windows, mirrors and steel structures.

We make an antenna with our own hands

There are many different schemes on the Internet that allow you to make a directional antenna. One of the more popular examples is the 12 dB double bi-square. To assemble such a device, a copper wire (diameter - 2-3 mm) 30 cm long is useful. The reflector here is a plate of foil getinaks - pressed paper impregnated with an adhesive and covered with copper foil. It is not always possible to find such a metal, so it is replaced by any other, up to the lid system block Or a regular beer can.

First, a double figure-eight of wire is bent (squares should have sides of 30 mm). To do this, the wire is marked on 8 equal parts and bent at the marked places 90 degrees with pliers. As a result, a kind of do-it-yourself antenna is obtained, which looks like a figure eight.

Next, a reflector is cut out of the getinax plate. Two holes are drilled in its center - one for the antenna itself, the second for the wire. Between the copper figure eight and the plate, a distance of at least 15 mm should be observed.

Next, you will have to work with the router itself, or rather, its small wi fi antenna. The wire must be brought out, for which a small hole is drilled in the body of the device. To homemade antenna in the form of a figure eight, the central wire is soldered, and the winding is attached to the leg.

If desired, you can make an ultra-long wi-fi antenna. To do this, you need to find a foil sheet of getinax and fiberglass. It is important that the material is good quality, had sufficient thickness and size. You will also need to use self-adhesive vinyl stencils with mounting film, necessary to protect the mentioned sheets from etching.

The rear wall-reflector is made of any flat sheets of metal. It can even be foil, as long as it is flat and even. First, you should mark the textolite and cut it with a grinder into two parts - 450 by 350 mm. Before proceeding with etching, the sheet must be cleaned with a fine-grained sandpaper. It is important to keep a distance of 9 mm between the getinax reflector and the board, which is achieved by using even plastic. Next, the resulting parts are glued together. A hole is left in the soft plastic, which will later allow you to solder the wire. Wires and connectors are available from radio markets. As for the choice of connector, here you need to rely on the antenna of the router.

The result is a do-it-yourself ultra-long antenna. From the access point at a distance of 1 km, the power of the device reaches 80 dB.

Amplifying the signal is quite simple, for this it is important to know certain subtleties and correctly assemble. So, high-quality communication is achieved subject to the following rules:

• In order for the signal to be evenly distributed throughout the room, the router should be installed as close to the center of the room as possible;
• The equipment should not be installed on the floor or near radiators, which will significantly impair communication transmission;
• The standard equipment of modern routers is usually omnidirectional, so it is recommended to purchase more powerful antennas;
• There are many methods that allow you to improve the signal with your own hands. The simplest is foil glued to the cardboard and installed in the right direction;
• Replacing the adapter allows you to amplify the signal;
• If you install a repeater, this device will significantly increase the signal transmission radius.

At the moment, almost everyone uses Wi-Fi, but not everyone likes the speed of the Internet. Fortunately, now there are many ways to improve the quality of the transmission, where the choice of a specific one depends on various parameters. It is also recommended to clean the registry from time to time, clearing it of unnecessary information.

In the modern world, a wireless network is widely used - wifi. For its operation, special equipment is installed - routers equipped with antennas. The latter are of several types, where each has its own characteristics, advantages and disadvantages. Asking the question “how to make wifi faster”, you need to understand what are different ways, both free and requiring investment.

Video

The principles of operation of long-range wi-fi antennas:

1. use of reflectors. These are reflectors that look like plates for satellite television. They concentrate the signal in a certain direction and thus amplify it;
2. to amplify the wi-fi signal of a long-range antenna, gratings are effective, which, at a certain location, direct the signal in the right direction;
3. it makes sense to apply these options in a combined combination of reflector and grating. Then you can amplify the signal even more. This is the most radical way to enhance.

From the above options, it is clear that in order to amplify the signal over a long distance, it is necessary to concentrate it in the right direction, and at the same time, it is possible to select industrial-made antennas that will meet the relevant requirements.

Industrial Antennas

Manufacturers of equipment for the network industry have also made sure that long-range wi-fi antennas are available to the consumer. Next, we will analyze examples of devices and their distinctive features.

Wi-Fi TL-ANT5830B has a reflector capable of directing the signal beam in the right direction, thus significantly amplifying it. The device is adapted specifically for clear communication over long distances.