An antenna is a device that collects and emits the electromagnetic waves broadcast in the air gap. With antennas, data can be transported several kilometers away. Dief and antennas are used for this purpose. Antennas consist of conductive materials and electrical receivers and transmitters. In the antenna part called transmitter, electrons are limited. The electrons that are constrained form a magnetic field. Over time, changing waves form an electro-magnetic wave into space and air space. Touching the area of ​​the antenna in these waves causes vibration. This makes the antennas useful. Diefs and antennas that act as a compass look like two intertwined circles. Many vessels are found in these instruments.