DEVICE FOR MEASURING FREQUENCY OF RADIO SIGNALS Russian patent published in 2020 - IPC G01S7/292 G01R23/00 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering and can be used in radio monitoring, radio communication, automatic frequency control systems, radio direction finders and similar means and systems, in which spectrum width and frequency of radio signals of radio signals sources are measured. Device for measuring frequency of radio signals comprises series-connected receiving antenna, high-frequency part of receiver, first and second processing channels, first subtractor. Each of the processing channels comprises series-connected band-pass filter, amplitude detector and low-pass filter. Device further includes a third, fourth, fifth and sixth processing channels, each having a series-connected multiplier and a low-pass filter, a second, third, fourth and fifth subtractors. Disclosed device enables additional determination of average power of noise component of input process in form of additive mixture of useful radio signal and noise, and subtracting it from low-frequency component of input process spectrum at outputs of first and second processing channels.

EFFECT: high accuracy of measuring frequency of radio signals by increasing the signal-to-noise ratio by compensating noise at outputs of the first and second processing channels.

1 cl, 1 dwg