How to make an antenna for a modem

Many of us are faced with poor reception of 3G communications. A homemade antenna for a 3G modem is one way out of the situation. And it's not so important there is a connector for it in your device or not, as we will offer you a solution option for such equipment, where it is, as well as for the one in which it does not exist.

An antenna for a modem can amplify a weak signal. Let's start with the easiest way to make it. Take the copper wire, and do about three or four turns around your device. It is best to do them at its very tip, since there is a built-in reception antenna.

For the test, we took a modem that showed -107 decibels. When the copper wire was wound, the so-called "palm-measure" index increased, while the reception indicators increased to -101 decibels. This antenna for a 3G modem with its own hands requires clear action. After all, you yourself will have to choose the length, thickness, as well as the number of turns of wire. For example, the additional length or coil can both improve and degrade the reception quality of the signal.

Antenna for modem: second option. It is called a colander or a pot. All amateurs of experiments, who were driven to desperation by a weak access speed, invent various exotic designs in the image and likeness of a pan, screens, and a satellite dish. This option is slightly better than the previous one, but such an antenna for the modem will require much more time.

It is worth noting that the kit with the device often includes an extension cable. Its length, as a rule, is from three to five meters. At the end there is a small piece of double-sided tape, with which the modem is attached near the window or on the wall. The instruction is also provided by the device manufacturer. By action, such an antenna for a modem is similar to a wire version, which was considered by us at the very beginning.

The following method is a can. At first it was often used in WI-FI networks. Thanks to this method, the craftsmen managed to stretch these networks a distance of several kilometers between the access points. So, we take an empty tin can and make simple calculations.

Here is an example of such a calculation. The diameter of the can (D) is one hundred millimeters. The wavelength L _o is 143 millimeters, respectively, L _o / 4 will be approximately 36 millimeters. The wavelength L _g is 261 millimeters, and L _g / 4 will be approximately 65 millimeters. Therefore, at a distance of 65 millimeters from the bottom of our can make a hole in which we fix the standard socket. A waveguide is soldered to it, the length of which is 36 millimeters. It should be made of copper wire, the diameter of which is two millimeters.

Now a cable is used for television in braiding, an antenna connector is attached to it, which is inserted into the jar, and on the other hand - a connector for the modem.

And if it does not have a connector? In this case, you can disassemble the device and find the measuring socket on the board itself. A shielded wire of small diameter is soldered to it. This will bring up the adapter to connect the antenna to it. But you need to do this very carefully, so as not to lose the guarantee of the modem or not to disable it completely.