Mumbai University > Electronics Engineering > Sem4 > Fundamentals of Communication Engineering

Marks: 5M

Year: May 2015

1. The information signal should be first converted into an electromagnetic signal before transmission because the wireless transmission takes place using the electromagnetic waves
2. The electromagnetic waves consist of both the electric and magnetic fields. The electromagnetic waves can travel a long distance through space
3. The electromagnetic signals are also called as the Radio Frequency
4. The EM waves oscillate. They are transmitted and the frequency is measured in Hz
5. The frequency of the EM signal can be very low or it can be extremely high. This entire range of frequencies of EM waves is called as the Electromagnetic spectrum
6. The Electromagnetic spectrum consists of signals such as 50Hz line frequency and voice signals at the lower end
7. The radio frequencies which are used for the two-way communication reside at the centre of the EM spectrum. These frequencies are used for the applications such as radio or TV broadcasting.
8. The infrared and the visible light are at the upper end of the EM spectrum.