Rectifier, comprising: - an AC input for receiving an AC input signal; - a DC output; - at least one transistor (M1, M3) for providing a rectified output signal to the DC output, the transistor (M1, M3) being a field effect transistor; - a threshold changing circuit (L0, L1, M1, M3, C2, C3, C7, R1) coupled to the bulk of the transistor, the threshold changing circuit (L0, L1, M1, M3, C2, C3, C7, R1) being adapted for electrically biasing a bulk (BM1, BM3) of the transistor (M1, M3) depending on the AC input signal by biasing at least one diode (M2, M4) coupled to the transistor (M1, M3) and using the resulting voltage drop on said diode (M2, M4) to bias the bulk of the transistor (M1, M3), to thereby change the voltage threshold of the transistor (M1, M3) depending on the AC input signal; and - a matching circuit, the matching circuit having - a power input for receiving input power; - a first matching circuit output coupled to the AC input, the first matching circuit output providing, in response to the received input power, a first voltage; - a second matching circuit output coupled to at least one of a gate of the transistor (M1, M3) and the bulk of the transistor (M1, M3), the second matching circuit output providing, in response to the received input power, a second voltage; - a first matching coil coupled between the power input and the AC input; - a second matching coil coupled to the AC input and providing the second voltage; - the first matching coil and the second matching coil being located with respect to each other such that an electromagnetic field produced by the first matching coil couples to the second matching coil to thereby increase the second voltage at the second matching circuit output compared to the first voltage at the first matching circuit output. - an AC input for receiving an AC input signal; - a DC output; - at least one transistor (M1, M3) for providing a rectified output signal to the DC output, the transistor (M1, M3) being a field effect transistor; - a threshold changing circuit (L0, L1, M1, M3, C2, C3, C7, R1) coupled to the bulk of the transistor, the threshold changing circuit (L0, L1, M1, M3, C2, C3, C7, R1) being adapted for electrically biasing a bulk (BM1, BM3) of the transistor (M1, M3) depending on the AC input signal by biasing at least one diode (M2, M4) coupled to the transistor (M1, M3) and using the resulting voltage drop on said diode (M2, M4) to bias the bulk of the transistor (M1, M3), to thereby change the voltage threshold of the transistor (M1, M3) depending on the AC input signal; and - a matching circuit, the matching circuit having - a power input for receiving input power; - a first matching circuit output coupled to the AC input, the first matching circuit output providing, in response to the received input power, a first voltage; - a second matching circuit output coupled to at least one of a gate of the transistor (M1, M3) and the bulk of the transistor (M1, M3), the second matching circuit output providing, in response to the received input power, a second voltage; - a first matching coil coupled between the power input and the AC input; - a second matching coil coupled to the AC input and providing the second voltage; - the first matching coil and the second matching coil being located with respect to each other such that an electromagnetic field produced by the first matching coil couples to the second matching coil to thereby increase the second voltage at the second matching circuit output compared to the first voltage at the first matching circuit output. - a power input for receiving input power; - a first matching circuit output coupled to the AC input, the first matching circuit output providing, in response to the received input power, a first voltage; - a second matching circuit output coupled to at least one of a gate of the transistor (M1, M3) and the bulk of the transistor (M1, M3), the second matching circuit output providing, in response to the received input power, a second voltage; - a first matching coil coupled between the power input and the AC input; - a second matching coil coupled to the AC input and providing the second voltage; - the first matching coil and the second matching coil being located with respect to each other such that an electromagnetic field produced by the first matching coil couples to the second matching coil to thereby increase the second voltage at the second matching circuit output compared to the first voltage at the first matching circuit output.