DEVICE FOR DETECTING WEAKLY VIBRATING OBJECTS Russian patent published in 2013 - IPC G01S13/56 

FIELD: physics.

SUBSTANCE: device for detecting weakly vibrating objects has a microwave balance mixer, a heterodyne, a microwave converter, a transmitting and a receiving antenna, a master generator, a first and a second reference generator, an intermediate frequency amplifier, a first, a second and a third multiplier, a frequency halver, a -45° phase changer, a +45° phase changer, a first and a second low frequency amplifier, a first and a second comparator with a reference voltage unit, a first and a second pulse counter with a count interval generator, a detection signal generator, connected to each other in a certain manner.

EFFECT: improved characteristics of detecting people from their breathing or heartbeat.

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