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Q: Draw the various RF bands of the IEEE (Institute for Electrical and Electronic Engineers) spectrum and write their applications.

Answer: In wireless communication, electromagnetic waves are used as a medium for the transfer of information. Thus in such a communication, the information signal is converted into the electromagnetic signal before transmission. The electromagnetic (EM) waves consist of both electric and magnetic fields and they can travel a long distance through space. The range of all possible frequencies of EM waves is called the electromagnetic spectrum, shown in the figure below. It extends from the frequencies used for modern radio (at the long-wavelength end) to gamma radiation (at the short-wavelength end). The mid‐range includes the most commonly used radio frequencies for two-way communications, television, and other applications.

The table below shows the radio frequency spectrum and its application according to various frequency bands.