Power coupler, power amplifier module with a power coupler and signal transmission module

Disclosed is a power coupler which is formed by a printed circuit board, a power amplifier module comprising the circuit board, and a signal transmission module. The power coupler comprises: a primary wiring unit which is formed on an upper surface of the printed circuit board and receives a plurality of symmetrical signals comprising positive balanced signals and negative balanced signals, and further comprising a plurality of positive primary wirings and a plurality of negative primary wirings wherein the plurality of positive primary wirings are spaced apart in a predetermined distance, the plurality of negative primary wirings are spaced apart in a predetermined distance, one end of the plurality of positive primary wirings commonly connected, to thereby receive the plurality of positive balanced signals, one end the plurality of negative primary wirings commonly connected, thereby receiving the plurality of negative balanced signals, and the other end of the plurality of positive primary wiring and the other end d it are connected to each other to thereby form a loop more negative primary wirings; and comprising a secondary wiring unit which is formed on the other upper side of the printed circuit board, and comprising a secondary wiring, which combines the benefits of the plurality of balanced signals of the primary wirings that form the loop, to thereby output a single end signal.