A wireless power transmission system comprising: a power transmitter adapted to convert an input DC power (Vin) into an electromagnetic energy; and a power receiver electromagnetically coupled with the power transmitter and adapted to receive an electromagnetic energy output from the power transmitter, wherein the power transmitter includes: a wave generating circuit adapted to generate a square wave control signal having a predetermined frequency and duty cycle according to the input DC power (Vin), wherein the wave generating circuit is configured to generate a PWM signal having a predetermined frequency and a predetermined duty cycle; a switching control drive circuit configured to convert the input DC power (Vin) into an alternating electrical signal according to the received square wave control signal; and a first coil coupling circuit configured to convert the alternating electrical signal output from the switching control drive circuit into the electromagnetic energy and output the electromagnetic energy; and wherein the power receiver includes: a second coil coupling circuit electromagnetically coupled with the first coil coupling circuit and adapted to receive the electromagnetic energy output from the first coil coupling circuit and convert the received electromagnetic energy into the alternating electrical signal, rectifying and filtering circuits (211, 212) configured to convert the alternating electrical signal output from the second coil coupling circuit into a DC electrical signal; and a DC-DC converting circuit configured to convert the DC electrical signal output from the rectifying and filtering circuits (211, 212) into a predetermined voltage output (Vout) or a predetermined current output; wherein said rectifying circuit is formed by a single diode. a power transmitter adapted to convert an input DC power (Vin) into an electromagnetic energy; and a power receiver electromagnetically coupled with the power transmitter and adapted to receive an electromagnetic energy output from the power transmitter, wherein the power transmitter includes: a wave generating circuit adapted to generate a square wave control signal having a predetermined frequency and duty cycle according to the input DC power (Vin), wherein the wave generating circuit is configured to generate a PWM signal having a predetermined frequency and a predetermined duty cycle; a switching control drive circuit configured to convert the input DC power (Vin) into an alternating electrical signal according to the received square wave control signal; and a first coil coupling circuit configured to convert the alternating electrical signal output from the switching control drive circuit into the electromagnetic energy and output the electromagnetic energy; a wave generating circuit adapted to generate a square wave control signal having a predetermined frequency and duty cycle according to the input DC power (Vin), wherein the wave generating circuit is configured to generate a PWM signal having a predetermined frequency and a predetermined duty cycle; a switching control drive circuit configured to convert the input DC power (Vin) into an alternating electrical signal according to the received square wave control signal; and a first coil coupling circuit configured to convert the alternating electrical signal output from the switching control drive circuit into the electromagnetic energy and output the electromagnetic energy; and wherein the power receiver includes: a second coil coupling circuit electromagnetically coupled with the first coil coupling circuit and adapted to receive the electromagnetic energy output from the first coil coupling circuit and convert the received electromagnetic energy into the alternating electrical signal, rectifying and filtering circuits (211, 212) configured to convert the alternating electrical signal output from the second coil coupling circuit into a DC electrical signal; and a DC-DC converting circuit configured to convert the DC electrical signal output from the rectifying and filtering circuits (211, 212) into a predetermined voltage output (Vout) or a predetermined current output; wherein said rectifying circuit is formed by a single diode. a second coil coupling circuit electromagnetically coupled with the first coil coupling circuit and adapted to receive the electromagnetic energy output from the first coil coupling circuit and convert the received electromagnetic energy into the alternating electrical signal, rectifying and filtering circuits (211, 212) configured to convert the alternating electrical signal output from the second coil coupling circuit into a DC electrical signal; and a DC-DC converting circuit configured to convert the DC electrical signal output from the rectifying and filtering circuits (211, 212) into a predetermined voltage output (Vout) or a predetermined current output; wherein said rectifying circuit is formed by a single diode.