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There are many reasons to use antennas but the main reason is, they provide an easy method to transmit signals wherever other techniques are not possible.įor instance, the pilot of an airplane needs to converse with the ATC personnel frequently. Typical antenna parameters are bandwidth, gain, radiation pattern, polarization, impedance & beamwidth. In receiving antenna is quite opposite because it allows radio signals from the space & changes them into electrical signals & provides them to a transmission line. In a transmitting antenna, an antenna receives electrical signals from a transmission line & changes them into radio waves.
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Sometimes, an electrical device like an antenna or an aerial is used to change electrical power to electromagnetic signals & vice-versa.Īntenna plays a key role in transmitting receiving electromagnetic radiation. This kind of antenna allows both transmitting and capturing electromagnetic signals which can move vertically and horizontally to transmit and capture the signal.įrom a transmission line, a signal is given to an antenna, after that this signal can be changed into electromagnetic energy to be broadcasted throughout space. The antennas that SCaN (Space Communications and Navigation) mainly includes a particular antenna with bowl-shaped that focuses signals at a particular end known as a parabolic antenna. The small size antennas can be found on the roofs to watch television whereas big ones are used to capturing signals using satellites. These are available in different sizes as well as shapes. A metallic structure that is used to transmit or capture radio electromagnetic signals is known as an antenna.