A technique used to ensure that the maximum power from a generator of electrical energy is dissipated in the load impedance. The diagram shows a generator with a complex source impedance (r + jx) feeding a load impedance (R + jX). Maximum power is dissipated in the load when

and

such that the reactances cancel. Under these conditions the load impedance is said to be the conjugate impedance of the complex source impedance and the circuit is said to be conjugate matched.

Conjugate matching