Amplitude modulation (AM) implies that the amplitude of a received wave must be known to recover the intelligence from the modulated signal. However at low frequencies, AM quarter/half wave antennas only pick up a part of the wave. This means that the antenna only gets a part of the height of the wave, and thus cannot know the true amplitude, only the frequency. So how can AM work under these conditions? What do I misunderstand?
Thanks,
J
Thanks,
J