METHOD FOR DEMODULATION OF PHASE-MODULATED RADIO FREQUENCY SIGNALS AND DEVICES FOR ITS REALISATION Russian patent published in 2008 - IPC H03D3/26 

FIELD: radio communication.

SUBSTANCE: in method and device DM is connected between source of RF phase-manipulated and phase-modulated (PM) signals and low-frequency (LF) load and is arranged in the form of quadripole, non-linear element, low-pass filter. PM signal is converted to APM signal, with the help of non-linear element spectrum of APM signal is destroyed into HF and LF components. As non-linear element three-pole element is used, which is connected between source of RF PM signals and quadripole or between quadripole and introduced HF load. Quadripole is arranged from at least three resistive dipoles, parameters of which are selected based on condition of provision of required values of amplitudes in two conditions and depth of amplitude modulation of APM signal. Conversion of PM signal into APM signal is done by supply of PM signal to the right slope of dependence of module of one of complex elements of resistance or conductivity matrix from frequency, or to the left slope of dependence of resistances or conductivities.

EFFECT: higher noise immunity of receiver.

6 cl, 6 dwg