PHASE BEARING FINDER Russian patent published in 2012 - IPC G01S3/46 

FIELD: radio engineering.

SUBSTANCE: phase bearing-finder comprises three antennas, a high-frequency amplifier, a reconfigurable heterodyne, mixers, a quadrature divider, preliminary amplifiers of intermediate frequency, bandpass filters, intermediate frequency amplifiers with a logarithmic video output and a radio output with limitation of an output radio signal amplitude, analog summators, quadrature phase detectors, a frequency selection signal shaper, threshold devices, a phase difference calculator, a shift voltage generator, a comparator and a four-input matching circuit, which are connected to each other in a certain manner.

EFFECT: due to using logarithmic amplifiers of intermediate frequency in a bearing finder and comparison of signals from video outputs of phase channel amplifiers and frequency channel amplifiers to each other, bearing finder noise immunity increases in wide dynamic and frequency ranges of input signals.

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