What is simultaneous conjugate match?
When driving an antenna, it might present a complex impedance such as R-jX. I.e. There is a capacitive element in the impedance. This can be cancelled by a driving impedance that includes +jX. This is called the conjugate impedance and, due to series tuning (resonance), the capacitive and added inductive reactances cancel to zero.

Hopefully, this is what you meant.