DOPPLER RADIO WAVE ANNUNCIATOR FOR SECURITY ALARM Russian patent published in 2010 - IPC G01S13/56 

FIELD: radio engineering.

SUBSTANCE: doppler radio wave annunciator for security alarm comprises superhigh-frequency (SHF) unit, driving oscillator, three Doppler mixers, transmitting antenna, two receiving antenna, low noise amplifier, barrier filter, low frequency amplifier, limiter, additional integrator, amplitude detector, integrator, comparator, reference voltage unit, alarm signal generator, reference frequency generator, balance mixer, three low pass filters, three amplifiers of intermediate frequency, phase detector, heterodyne, two phase changers by 90°, four multipliers, two narrow band filters, two correlators, two extreme controllers, two units of controlled delay, distance indicator and angle indicator, which are connected to each other in a certain manner.

EFFECT: expansion of functional resources making it possible to detect location of object that intruded into secured territory.

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