Amplitude Modulation AM Bandwidth Calculator

This tool calculates the bandwidth of an AM signal.


The modulating signal is given by the equation

m(t) = Am cos(2π fm t)

and the carrier signal be,

c(t) = Ac cos(2π fc t)


  • Am is the amplitude of the modulating signal
  • Ac is the amplitude of the carrier signal
  • fm is the frequency of the modulating signal 
  • fc is the frequency of the carrier signal

Then, the equation of Amplitude Modulated wave will be

s(t) = [Ac + Am cos(2π fm t)] cos(2π fc t)

The AM signal is shown below. The bandwidth of the signal is 2*fm

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