Multicarrier amplification

Four un-modulated carriers travel through a common non-linear amplifier. One of them has a larger level. A predistorter using two diodes and a phase-shifter has been inserted at the amplifier input, and the "Minimax" module of Radiosim has been used to maximize the C/I of the three small level carriers (a command not used here allows to visualize the intermodulation power existing just at a carrier frequency)..

multcarrier.gif (7109 octets)

Other examples : Fresnel plan    Eye diagram     Group delay of a feeder   Group delay of a filter
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