Directional Antenna

When you transmit using a radio, the radio waves are transmitted along the length of the antenna. With the antenna pointing straight up, you get a nice even signal emitted in all directions (think of the ripples on the surface of water). You can however buy directional antennas, designed to concentrate the transmission in a focussed direction. You can even get a standard antenna to work in a similar way. Neither of these two options are allowed under REVCOM's license.