One example of omnidirectional antennas is the very common vertical antenna or whip antenna consisting of a metal rod (often, but not always, a quarter of a wavelength long). A dipole antenna is similar but consists of two such conductors extending in opposite directions, with a total length that is often, but not always, a half of a wavelength long. Dipoles are typically oriented horizontally in which case they are weakly directional: signals are reasonably well radiated toward or received from all directions with the exception of the direction along the conductor itself; this region is called the antenna blind cone or null.
One example of omnidirectional antennas is the very common vertical antenna or whip antenna consisting of a metal rod ( often , but not always , a quarter of a wavelength long ) . A dipole antenna is similar but consists of two such conductors extending in opposite directions , with a total length that is often , but not always , a half of a wavelength long . Dipoles are typically oriented horizontally in which case they are weakly directional : signals are reasonably well radiated toward or received from all directions with the exception of the direction along the conductor itself ; this region is called the antenna blind cone or null .
In which direction would you expect to find a dipole?
In which direction would you expect to find a dipole ?
horizontally
horizontally