Homemade antennas for 3g modem. We make a cellular amplifier with our own hands

Many people in modern world uses the mobile Internet - with the help of it, a person can communicate remotely, receive information and even work. But the provider does not always provide users with a stable connection speed due to the peculiarities of receiving communications, which may be limited by the terrain, long distance to the transmitter and other factors.

A homemade antenna for a 3g modem will help you improve the speed and range of signal reception. We offer you some instructions on how to make an antenna for a 3G modem with your own hands.

Kharchenko's method

Recently, we wrote how to make an antenna for receiving television with our own hands. But did you know that you can make a homemade antenna for a 3G modem in the same way?

We will need:

Copper wire or wire, you need a section of about 30 centimeters;
50 or 75 ohm coaxial cable;
A piece of foil or a DVD as a reflector;
Tools: knife, soldering iron, pliers, glue, ruler and pencil;
Plastic bottle cap to separate the antenna from the reflector.

Making a Kharchenko Bisquare

On photos homemade antennas for 3G modems you can see it approximate view. First you need to make markings on the copper wire with a pencil: the length of the outer side of each of the squares should be approximately 35-36 mm.

Gently bend the wire along the markup, helping yourself with pliers. You should get a symmetrical design of two squares touching at the corners. Remove the remaining pieces of wire.

Make a hole in the cover, thread the end of the cable through it. Separate the cable, exposing the inner conductor and the shield for soldering.

Next, solder the antenna to the cable and connect it to the modem. Soldering is as follows: solder the central core to the middle of the antenna on one side, and the screen on the other. Then move the cover to the antenna, you can further strengthen and insulate the structure with glue or sealant.

Through the hole, insert the reflector disk into the wire, move it to the antenna and glue it to the cover. Solder to the cable on the other side the connector for connecting to the modem. Connect the antenna to the modem. Enjoy the result of your work!

Antenna "double ring"

The next way to create a homemade antenna is more difficult to perform, but gives a greater effect. To complete it, you will need:

Copper wire or wire;
Reflector - a flat long tin can, a piece of foil, etc.;
75 ohm coaxial cable;
A short metal tube into which a cable can be threaded;
Connector for connecting the antenna to the modem;
Tools: soldering iron, knife, ruler and pencil.

Detailed manufacturing instructions:

Look on the Internet for a Bi-Loop antenna scheme for a 3g modem - on it you will see a design similar to the Kharchenko antenna, but in the form of two rings;
Make a marking on the wire with a pencil: for waves with a length of 2050 MHz, the length of each ring should be approximately 146 mm;
Gently bend a double ring from the wire. It is also possible to make two rings with gaps about 3 mm long and solder their ends to each other, leaving the gaps open;
Build a reflector. Minimum dimensions: height - 120 mm, width - 170 mm. Any metal panel will do; from improvised means, you can use foil or tin from a tin can;
Make a hole in the middle of the reflector through which to insert a metal tube - from the connection side with the antenna, the length of the tube should be approximately 18 mm! Solder the tube to the reflector on the other side;
Separate the cable with a knife: the screen should be soldered, and the conductor should be slightly exposed;
Thread the cable into the tube and solder the antenna to it: upper part should be soldered to the conductor, and the bottom to the copper tube;
Solder the tube and cable sheath;
Additionally, to amplify the signal, you can use a satellite dish by installing the finished antenna on the bracket;
The other end of the cable should be connected to the modem connector using a soldering iron;
Connect antenna to modem. Ready!

Now you know several ways to make an antenna for a 3G modem with your own hands. The above methods should help you solve problems with low Internet connection speed.

Photo antennas for 3g modem

Many of us have been using devices such as modems from cellular operators for a long time and with pleasure, which allow us to access the World Wide Web. Unfortunately, unlike broadband wired internet, such devices have several significant drawbacks. The main one is the features of radio signal propagation in the surrounding space. Radio waves in the 3G, 4G and LTE bands have a bad property of being reflected from obstacles, scattered and attenuated, respectively, the speed and quality of the Internet connection deteriorates. What can be done in such a situation?

The easiest and cheapest way to amplify the signal coming from base station provider to your modem is a do-it-yourself homemade antenna made from improvised means. Let's take a look at the simplest and most popular options for manufacturing structures that amplify the radio signal coming to the modem from the BS together.

wire antenna

The simplest version of a homemade antenna is to use a piece of copper wire with a small section, which must be wound in several turns around the top of the modem. The remaining end of the wire 20-30 centimeters long is unfolded vertically. This primitive method, under certain conditions, can significantly increase the stability of the received radio signal.

Can

Probably, in any home you can, if you wish, find an empty used can of soft drinks or coffee. This simple item can become the basis of another homemade antenna. We remove the lid of the container, make a hole in the side wall, insert the modem there up to half of the case, use a USB extension cable to connect to a computer or laptop. Next, it remains to find the best location of the structure in space. amplification effect in this case can be very good.

Colander 4G

Most people have an ordinary aluminum colander. And this piece of utensil can be used to create another simple antenna for the modem. It is only necessary to fix the "whistle" in the bowl of dishes, for example, with adhesive tape. As they say, everything ingenious is simple.

Frame zigzag antenna of the famous Soviet radio amateur Kharchenko. For the manufacture of such an amplifier, you will need a copper wire with a cross section of 2.5 mm. We bend it in the form of two combined squares, place a modem connected via a USB cable to the computer at the connection point. From the back of the antenna we attach a thin sheet of metal as a reflector. You can make such a device quite quickly, and the gain under certain conditions can be very pleasing.

Converted satellite dish

Many of us use the services satellite television. And if you have an old satellite dish at your disposal, then it can be converted into an antenna for a 4G modem. It is very easy to do this. We remove the converter from the rod and attach the modem in its place. We direct the structure towards the provider's base station, slowly rotate it until the best result is achieved.

So, we examined several options for making an antenna for a 4G modem with our own hands from the available tools at hand. You can try to make any of the proposed models yourself and significantly amplify the signal received from the provider's base station. Good luck!

High-speed Internet in the modern world is an integral part of human life. It is known that connection to world wide web on a computer occurs through a modem, which is divided into stationary and wireless. If this is cable equipment, everything is quite simple here and the speed is high. If a portable modem is used (2G, 3G or 4G), then it is not always possible to get a high-quality high speed connection. And here a banal antenna can come to the rescue.

Instructions for making an antenna for a 4G modem yourself.

Do not immediately undermine and buy an industrially manufactured amplifier. It is quite expensive and is not suitable for every modem, as it requires a built-in connector or an additional adapter, which is comparable in cost to the 3G or 4G router itself. And here, naturally, the question arises of how to make an antenna for a modem with your own hands, without having certain skills.

Before disassembling the ways self-manufacturing the amplifier should know the reasons for a poor Internet connection, on which the quality of communication largely depends.

Normal network congestion.
Long distance from the modem to the provider's station.
Finding a 4G device in a certain part of the house.
Obstacles between the router and the distribution station.

How can I increase the signal of the router

If you purchased a 4G modem, for example, Megafon, to replace an old router, and the declared speed remains the same, then the problem most likely lies in the weak signal of this area. In this case, you can make a compact antenna with your own hands.

How to make a do-it-yourself antenna for a modem

It is no secret that the main criterion effective work modern 4G router, be it Beeline, Megafon, MTS, etc. is not the number shown control program percent, decibels and sticks on the wi-fi scale, and a real increase in speed. And the discrepancy between the parameters of the speed mode and the natural indicators of the purchased modem is not yet a reason to refuse one or another Internet service provider. If there is a signal, then it is quite possible to amplify it, while increasing the speed and quality, using a do-it-yourself antenna.

wire antenna

This is the simplest and most primitive do-it-yourself signal amplification option. It is necessary to take an ordinary copper wire and wrap the upper part of the 4G modem with one end for 3–4 turns. Raise the other end up. This method will slightly increase the signal, but it can still make the connection more stable.

can antenna

A very common idea that has been “walking” among users of such routers for a long time and enjoys some success. But this method requires the ability to solder the parts yourself, otherwise you can ruin the modem itself.

First you need to make a hole at the bottom of the tin can (you can use coffee) for a tin sleeve that will need to be soldered.
Then, in the center between the bottom and the top, make a section that matches the dimensions of the 4G modem.
After that, insert the router itself into the hole made with the entrance outward and direct the amplifier towards the operator's tower.
As a result, connect the device to the computer using a USB cable as short as possible.

IMPORTANT. It is better to install such a design under the ceiling so that nothing interferes with signal reception.

This design is considered the most effective of all types of homemade devices and for this you need:

Take a copper wire (3-4 mm) and bend it so that 2 identical rhombuses (with an angle of 120 °) of small size (with a side of 53 mm) are formed.
At the junction of the rhombuses, solder the part for fastening the high-frequency cable.
To strengthen the antenna, you can attach a metal plate (reflector) to it.
If the 4G modem does not have a connector for an external antenna, then wrap the central core cable around it with 3-4 turns.

IMPORTANT. There must be a distance of at least 3 cm between the antenna and the reflector.

If you have a satellite dish, you can make a wonderful amplifier with your own hands. For this, it is necessary to focus already installed antenna attach the modem, connect it to the PC using a USB cable and tune to the desired station. But there is a nuance here: how to set up the antenna yourself. The plate should not be directed upwards, like on television, but downwards, periodically rotating it and using a special program to monitor changes in the Internet connection. After discovery maximum value the antenna needs to be fixed.

IMPORTANT. The Internet plate should not be connected to the television. And to protect the 4G modem from precipitation, you can use a bag or a plastic bottle, this will not affect the signal quality in any way.

To achieve desired result may have to try different variants homemade antennas. The main thing is that each of these methods really works and can really help, even in the most hopeless situation.

Today there are many various ways Internet connection. At the same time, it cannot be said that all of them are equally effective and built according to a single principle. In particular, if we talk about operators working with mobile devices, then they offer a good Internet connection in those areas that are located within the signal transmission radius from the towers. It is clear that the farther the signal, the more interference and discontinuities. Of course, the largest operators cellular communication they try to create the maximum coverage of the territories of those countries where they work, but this is not always enough.

A 3G antenna helps to amplify such operator's gsm signals. This is a fairly light and simple device that does not require much hassle in setting up and installing. At the same time, if you have purchased a 3G antenna, then it is best to entrust the adjustment of its connection to professionals. In turn, for those who are very well versed in technology, there are quite a large number of instructions on how to create a 3G antenna with your own hands.

Where is the 3G antenna attached?

Quite light and simple in the 3G device, the antenna can catch GSM signal operator, both indoors and outdoors. In addition to such a device, there is usually a metal multifunctional, durable bracket and a ten-meter cable. With their help, the antenna can be attached either to a high mast or to a wall. In extreme cases, the 3G antenna can be placed near the window or right on the windowsill. Similar device easy to transport and reconfiguration quickly connects to the network. According to the degree of signal amplification, antennas can be divided into:

weak;
medium;
strong.

So, one of the most effective 3G GSM antennas is the UMTS HSDPA 21 dB 1900-2100 MHz model, which is able to open Internet access even in areas where the signal is almost imperceptible. This device works with such mobile operators as Kyivstar, Life, MTS, Trimob, Ukrtelecom and Utel. To achieve a 100% result, it is best to use such a tandem as an antenna, a UMTS- or HSDPA-type SIM card and a 3G modem.

The main specifics of antennas with powerful amplifier signal is the need to fine-tune them in the direction of the main station of the mobile operator.

3G GSM antennas, which do not have a very good amplifying effect, are considered the cheapest. They have almost all the characteristics that their more expensive counterparts, but are suitable for cases in which the signal source is located in close proximity.

The middle segment of 3G antennas is, in principle, capable of providing Internet transmission from a GSM operator to a computer, even if the degree of coverage does not apply to green zones. It should be remembered that in this case the quality will not be too high and the signal may be interrupted.

Do not think that the ideal and only right option for purchasing is a 3G antenna with a powerful signal amplifier. It is of course universal, but due to the highest cost it is not always appropriate. If you need a slight increase in the existing GSM connection, then more will do. cheap option.

How to create a 3G GSM antenna with your own hands

Despite the fact that 3G GSM antennas are relatively inexpensive and are sold in almost any store mobile communications, however, if you can’t afford this thing at all, then you can make it with your own hands.

Step 1. First things first, it is advisable to find and download on the Internet special program, which allows you to calculate a quadratic antenna in a few keystrokes. Next, to create the design itself, it is desirable to prepare the following materials:

RG6U wire and connector for it;
copper wire, 1-4 mm in diameter;
a small plastic lid (a deodorant and shaving foam cap will do);
a small sheet of plywood 120x134 mm;
foil;
soldering iron;
solder;
rosin.

Step 2. After the tools are prepared, we take the wire and fold it in such a way that we get two interconnected squares (butterfly). Each side of both squares should be equal to 53 millimeters.
Step 3. In this case, the ends of the wire should coincide in the middle of the connection of the squares and it is they who need to be soldered to one end antenna wire, apply solder to the opposite corner of the wire and clean it all with a connector. The central core of such a wire must be arranged in such a way that it protrudes from the connector by approximately 1 cm.
Step 4. Then it is desirable to solder the wire braid with the help of the same rosin. If this does not work out, then it is easier to solder the core of the wire to the side of the connector body.

Step 5. After that, foil comes into play. She needs to wrap the plywood and punch a small hole in the middle for the wire. Thus, you get a reflector for the antenna. At this stage, it should be taken into account that the frame should be located 35 mm above the reflector. A pre-prepared plastic cap is capable of providing this.
Step 6. Several grooves of 1 cm should be cut in it. Following this, we place the antenna at the desired level, about 4.5 cm. Lastly, we fix the reflector and that's it, our home-made 3G GSM antenna is ready.

Checking Antenna Operation

At the next stage, it is necessary to check how our 3G GSM antenna will interact with the modem. If the modem does not have a connector to connect it, then you can use the antenna to antenna method.

Thus, our homemade device will capture a signal from another structure that will take over the function of the repeater. To carry out such work, you need to protect the core from the other end of the wire, which comes from our 3G GSM antenna, by approximately 10-15 centimeters. But to ensure the most powerful signal, a strip of foil 7-9 centimeters in size should be attached to the edge of the wire braid in the form of circular polarization.

All mobile operators that offer Internet access via the 3g network (MTS, Megafon, Beeline, etc.) have a certain coverage area. If you are behind it, then the Internet connection will be very weak, the connection will be unstable, the speed will be low. In such cases, you can use options that will provide amplification of the 3g modem signal.

How to amplify the signal of a 3g modem using speakers

The first option, how to amplify the signal of a 3g modem with your own hands, which you can try at home without any extra spending and effort, is to use ordinary speakers. Users mobile internet noted that if you move them closer to the modem, the signal level increases by 10-20%. This is not very much, but poor quality communication gives a significant increase. To get rid of annoying clicks from the speakers, the volume should be set to a minimum.

Signal booster for 3g copper wire modem

Another way to easily amplify the 3g modem signal with your own hands will require you a little more action than the speaker option. You need to make a structure out of wire and a tin that would act as an antenna. The algorithm of actions is as follows:

Take copper wire (preferably a long piece).
Open the gadget and make 5-6 turns around the SIM card.
Pull the other end to the window.
Take a tin can or cut off the neck of a beer to make a "glass". It will act as a reflector that enhances communication.
Tape the free end of the wire to the bottom of the can.
Rotate the neck towards the nearest operator's tower. The increase in the quality of the Internet will be up to the level of 90-95%.

How to strengthen the signal of a 3g modem with network settings

Before you make antennas with your own hands, you should try another method, how to enhance the reception of a 3g modem signal. Some mobile Internet users do not know that by default, with a low connection quality, the device automatically switches to 2g communication mode, with which it is not possible to work normally. In this case, the transition occurs even in the presence of 2-3 "sticks". To avoid such situations, you should clearly indicate through the device settings that only a 3g connection should be used. How to change an option:

run the network setup program;
select the "Connection" tab (or with a similar name);
then the network search mode needs to be changed from automatic to 3g.

This will force the device to work only on those frequencies without dropping the connection to a slower one. Some modems do not have such an item in the application interface for the device. In this case, you should look for a combination to activate the built-in command in the instructions for the device or on specialized forums. For each modem model, its own order of enabling the option is programmed.

Strengthening the signal of a 3g modem with a USB extension

This is not the best, but a working way, how to easily amplify the 3g modem signal with your own hands. Suitable well for people who do not want to disassemble, solder their device. The design works on the principle satellite dish. To make it, you need to buy a "reflector" (jar, bowl, CD), USB cable"mom-dad" 3 meters. The creation process is as follows:

In the middle of the disk, make a mount for a flash drive, or tape it with tape.
Connect the cable with one end to the computer and the other end to the modem.
You can use a stick instead of a holder or simply fix the disc from the side of the street to the facade of the house.
Point the flash drive in the direction where the signal is strongest.

The increase in communication quality is not very large, because usb cable loses some of it because of the length, but still improves the connection. The mirror surface of the CD acts as an amplifier. It is recommended to use a bowl instead of a disc because its reflective surface is larger and the reception will be even better. Enameled options are not suitable, use stainless steel products.

Special external signal amplifier 3g modem

Operators are aware of communication problems, so they are constantly trying to expand their coverage area. As an intermediate solution, for example, a 3g signal amplifier was created for the Megafon modem and other companies. This is an antenna that operates at the required frequencies, and you need to connect it directly to the device. When choosing a model, one should rely on the indicators of the radiation pattern and gain.

For effective operation of the antenna, it must be directed towards the tower of the mobile operator, which is closest to your home. Attach the stand so that the pins are perpendicular to the ground. Please note that the longer the cable length, the greater the signal loss along its length. A short cord will provide sufficient bond gain, provided it is good quality. If you bought an amplifier, then you should not save on the cable.

How to strengthen the 3G signal with your own hands using a repeater

The most effective is amplification using a special device - a 3G repeater. Amplification is possible only if the phone catches at least a minimal 3G signal. This approach can be called fully professional, because after installing the repeater you will receive:

the maximum possible amplification of the 3G signal;
top speed of the mobile Internet, which is able to provide mobile operator;
stable reception area within the coverage radius of the internal antenna;
getting rid of the problems that come with weak signal: communication breaks, subscriber unavailability, interruptions during a conversation and others.

A repeater is a house or apartment, which in itself is only part of the 3G signal amplification circuit. For creating complete system required external antenna, which picks up the signal mobile operator from the base station and indoor antenna, which "distributes" a cellular signal to subscribers indoors. All this is switched coaxial cable. IN difficult cases boosters, attenuators, splitters and other equipment may be needed. In normal cases, for example, to amplify the 3G signal in a summer cottage outside the city or in a cottage, it is enough to buy a ready-made kit, for example, VEGATEL VT-3G-kit. This kit is optimal in terms of price / quality, it works reliably and you can easily install it yourself. VEGAtel equipment is manufactured in Russia and has all the necessary certificates.

How to strengthen the signal reception of a 3g modem with an internal antenna

Another option on how to strengthen the 3g modem signal with your own hands is to use additional devices to connect to the indoor antenna. Each such device has it, but some have an open connector, you can easily connect to it, while in others it is hidden in the case, and to use it, you will have to solder part of the device. In the first case, you just need to buy an amplifier or use television antenna as a receiver.

If the connector does not exist, then you can take the device to service center, there, for an affordable fee, the master will do for you possible connection repeater, which will improve communication with the nearest operator tower. The main drawback of the method is that it will no longer be possible to use the modem only with an internal antenna, so you only need to decide on such a step if you know for sure that you will no longer need it.