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from VSWR and displacement

It says "VSWR is not in any way dependent on the equivalent source impedance of the generator."


That is a fact, however in practice it is most likely that if you attempt to change source impedance of your transmitter, you will likely be changing any significant harmonic/spurious content and that will change your VSWR.  Unless you are transmitting into a load which has same impedance across all frequencies, which antennas are not.