FIELD: radio engineering, communication.
SUBSTANCE: high-frequency signal is transmitted to a modulator made from a resistive four-terminal element, a controlled two-electrode nonlinear element, a low-frequency control signal source and a load; the amplitude and phase of the high-frequency signal are varied by varying the amplitude of the low-frequency control signal on the nonlinear element. In a given frequency band, selection of frequency characteristics of imaginary components of resistance of the load and the high-frequency signal source is carried out in accordance with given mathematical expressions which are executed in the apparatus using reactive two-terminal elements in form of two series-oscillatory circuits connected in parallel.
EFFECT: amplitude and phase modulation of a high-frequency signal with given dependence of the ratio of modules and phase difference of the transfer function of the modulator in two states of the controlled nonlinear element, defined by two levels of the low-frequency control signal, on the frequency in a given frequency band.
2 cl, 4 dwg
