Abstract: A method of converting the carrier frequency of an incoming electromagnetic wave spectrum in an electromagnetic energy receiver comprising a converter, whereby the energy of the electromagnetic waves received by the receiver is accumulated in the input resonant system of the aforementioned converter which is frequency-selective and can be returned in the operating frequency range of this receiver. The electromagnetic energy is accumulated either directly in the material of the semiconductor, in particular, dielectric element used in the above input resonant system, or in a resonator which is contained in the same input resonant system and is built on sections of a lumped- and/or distributed-parameter line and which includes a semiconductor element. The electromagnetic characteristics of the semiconductor element depend on the electromagnetic parameters of constant and variable magnetic and electric fields acting upon this element.