Reconsideration of Maximum Power Transfer Law

In the signal transmission, power is one of the most important factors to be considered. The first part of the paper discusses on sinusoidal steady-state maximum power transmission on the basis of the maximum power transfer theorem, and works out the maximum power transfer of Thevenin's equivalent resistance under three specific boundary conditions. The second part of the paper introduces three typical LC matching networks used to achieve maximum power transfer under the circumstances in which the load cannot be changed arbitrarily: the “L” matching network, the “T” matching network and “π” matching network, and discuss the three matching networks are essentially a network that is “L” matching network.