What is an antenna? Find the length of a dipole antenna for a carrier wave of frequency 3 × 10 8 Hz .

An antenna is mainly used as a metallic device for radiating or receiving radio waves which are basically used for transmitting signals, transmitting antenna is used to transmit information and for receiving signals, receiving antenna is used at the receiver end to receive signals. Given the frequency of the carrier wave ν = 3 × 10 8 Hz , The wavelength of the carrier wave λ = c ν = 3 × 10 8 ms - 1 3 × 10 8 Hz = 1 . 0 m The length of the dipole antenna should be equal to λ 4 = 1 4 = 25 cm . Hence, the length of the antenna is 25 cm