You will need
  • - thick antenna wire;
  • - metal plate;
  • foil;
  • - copper wire;
  • connector;
  • - soldering iron;
  • - the range;
  • marker;
  • - drill;
  • sealant;
  • - the cap from the hairspray.
Instruction
1
Bend the wire: it should have two squares with sides 53 mm. Then pull a few of these squares into rhombuses, two angles should be equal to 120 degrees.
2
Smoothen the prepared wire (after the wire is put on the connector, its protected part should be half inch). Then to the body of the connector, solder the wire: should be "fork".
3
Solder a "plug" to the frame of the antenna. However, to increase the power of a homemade antenna for 3g modem this device should be fitted to the reflector. As the reflector can be used a metal plate made of a PCB or of plywood, wrapped in foil.
4
The reflector should be the following sizes: 120 to 135 mm. Make the layout of the metal plate and trim it. Drill a hole in the middle of the reflector: the hole diameter should be equal to the thickness used in the construction of the wire.
5
The distance between antenna and reflector must be exactly 36 millimeters. In this case, perfectly fit cap from hair spray: make it groove, insert the wire and lock it.
6
To make your design has not collapsed, all the joints treated with a silicone. Then the Central wire wrap a 3g modem (make four or five turns), and the second put the foil. After collect the homemade antenna, find a place where the best signal, and set there his invention.