Modulation is required for:

Answer: Modulation is required for to transmit signal over an antenna through free space, to improve signal to noise ratio and to make the low frequency signals travel long distance.

Modulation is process of varying one or more properties of a periodic waveform. Modulation is necessary because it can ensure Reduction in the height of antenna and avoids mixing of signals.

Summary:

Modulation is required for

Modulation is required for to transmit signal over an antenna through free space, to improve signal to noise ratio and to make the low frequency signals travel long distance.