FIELD: physics.
SUBSTANCE: proposed system comprises readout unit and two transducers arranged on different objects to be identified. Readout unit comprises unmodulated oscillation generator, three multipliers, transceiving antenna, low-pass filter, adder, power amplifier, duplexer, HF amplifier, four bandpass filters, two mixers, local oscillator, two intermediate frequency amplifiers, two phase detectors, registration unit, all said components being interconnected in a certain way. Every transducer incorporates piezo crystal with aluminium thin-film double-finger transducer and set of reflectors. Said double-finger transducer comprises electrodes and buses connected with micro strip transceiving antenna.
EFFECT: efficient identification of two close objects by using radio-frequency marks and complex phase-modulated signals.
2 dwg
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