Antenna is The physical device used for sending/receiving radio waves. Older phones used external antennas while most current phones use an internal antenna. The size and shape of the antenna is designed according to the type of radio waves being used.
The first antennas were built in 1888 by German physicist Heinrich Hertz in his pioneering experiments to prove the existence of waves predicted by the electromagnetic theory of James Clerk Maxwell. Hertz placed dipole antennas at the focal point of parabolic reflectors for both transmitting and receiving. Starting in 1895, Guglielmo Marconi began development of antennas practical for long-distance, wireless telegraphy, for which he received a Nobel Prize
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