DEVICE TO DETECT DIRECTION AT SIGNAL SOURCE Russian patent published in 2013 - IPC G01S3/02 

FIELD: measurement equipment.

SUBSTANCE: device to detect direction at a signal source comprises three low pass filters, five amplifiers, five analogue-to-digital converters, three signal receivers, three reject filters, four controlled filters, a personal computer (PC), a clock oscillator, a delay line, a summator, a frequency synthesiser, two registers, three mixers, an antenna unit, a synchronisation device, a communication unit, providing for reception of signals from GPS or Glonass systems, two synchronous detectors, a limiter, a phase changer, a detector, four keys, a counter, three calibrators, three narrow-band filters, three AND circuits.

EFFECT: lower noise during variation of radio station frequencies.

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