PURPOSE: To obtain a communication method which saves power and is capable of preventing a wiretap without generating a radio wave fault by arranging plural feeble radio wave generation sources at a prescribed space and simultaneously transmitting the reception radio wave signals from other radio wave generation source at each radio wave generation source.

CONSTITUTION: A transmission is performed by a feeble radio waves of 50MHz from a transmission main station 1. At a branch station 2, the radio waves of 50MHz of the transmission main station 1 is received, the signal is modulated to 52MHz and it is simultaneously transmitted. At a branch station 3, the radio waves of 52MHz of the branch station 2 is received, the signal is modulated to 54MHz and it is simultaneously transmitted. In the same way, the signal is modulated to 56MHz at a branch station 4, 58MHz at a branch station 5 and 60MHz at a branch station 6, respectively, and the signal is simultaneously transmitted. At a reception station 7, the signal of 60MHz is received. In this way, a communication can be performed. In this case, when the radio intensity at the distance of 3m from the generation source of a power source exceeds 1mV/m, this method is not preferable because the interference with other station and the fault to other communication system become conspicuous.