[Visitor (223.166.*.*)]answers [Chinese ]  Time :20210401  The maximum power transmission the therm is the the therology that the load gets the maximum power when it matches the power supply. The the theology is divided into dc circuit and AC circuit, the content is shown below.
DC circuit
The source linear resistor singleport network (Ro＞0) transmits the maximum power to the variable resistance load RL under the condition that the load resistance RL is equal to the output resistance Ro of the singleport network. When the RLRo condition is met, it is called the maximum power match, at which point the load resistor RL gets the maximum power: PmaxUoc2/4R0.
AC circuit If a sinesteady singlemouth network is powered to a loaded ZLRLjXL, if the singlemouth network can be replaced by a Vedning (also known as Davidnan) equivalent circuit (where Zo＞Ro＞JXo, Ro＞0), When the load impedance is equal to the conjugate complex number containing the source singleport network output impedance (i.e., the resistance component is equal, the electrical resistance component is only numerically equal and the symbol is opposite), the load can obtain the maximum average power PmaxUoc2/4R0. This match, called conjugate matching, is often required in the design of communications and electronic devices to satisfy conjugate matching in order to maximize the load. 
