Abstract: The measurement method according to the invention comprises coding conversion of the spatial intensity distribution of electromagnetic radiation into an electric signal with the aid of the stationary Josephson effect, setting this signal to be variations in the maximal Josephson current produced by the electromagnetic radiation under study, varying the coding conversion parameters by applying an external magnetic field to junction (2), with spatial frequencies of the Josephson current density as a function of Josephson junction (2) coordinates serving as these coding conversion parameters, measuring the electric signal as a function of these coding conversion parameters, and decoding injective mapping of the measured dependence of electric signal from the coding conversion parameters with the aid of the integral Fourier transform.

Abstract: A method for measuring the spectral distribution of electromagnetic radiation intensity, wherein the spectral distribution of electromagnetic radiation intensity is converted to an electric signal by means of a direct integral Hilbert transform in superconducting weak links. The electric signal as a function of a direct integral Hilbert transform parameter is measured, and the desired spectral distribution of electromagnetic radiation intensity is determined by applying an inverse integral Hilbert transform to the measured function. A spectrometer of millimeter and far-infrared ranges for effecting the above method is provided for determining the frequency spectrum of microwave or infrared radiation signals. The radiation to be measured is modulated, with the modulated signal coupled to a receiver to which a variable scanning voltage is applied by a control unit, the value of the scanning voltage being proportional to a Hilbert transform parameter.