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Antenna
An antenna or aerial is a system of elevated conductors which couples the transmitters or the receiver to free space.
The antenna is employed for both transmitting and receiving the radio frequency signals. Many functions and the same antenna is used for both functions.
Antenna
(I) Fig. shows the dipole antenna and is basically used as radio antenna. The physical length of antenna is λ/2 where λ is wavelength in free space at the frequency of operation of station.
(II) A microwave antenna is used for transmitting and receiving signals in the microwave range (1 to 50 GHz). This antenna has great directivity. For this reason, it is used in render system and for receiving broadcast directly from the satellites.
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