FIELD: radio engineering, communication.
SUBSTANCE: method for amplitude-modulation and demodulation of high-frequency signals involves connecting a modulation and demodulation device between a high-frequency signal source and a low-frequency load, and consists of a matching four-terminal element with at least three two-terminal elements, a three-terminal nonlinear element, a high-frequency load and a low-pass filter; in demodulation mode, using a three-terminal nonlinear element, the spectrum of amplitude-modulated signals is decomposed, their amplitude modulation coefficient is corrected and the low-frequency information signal is selected using a low-pass filter. The apparatus includes said elements for realising the method, wherein the matching four-terminal element is made from reactive two-terminal elements, parameter values of elements of which are determined using given relationships.
EFFECT: generation of required amplitude-modulated signals, as well as demodulation of such signals by realising said ratios of moduli of transmission coefficients in two states of the nonlinear element.
2 cl, 5 dwg
