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UDC 621.396.96

INFLUENCE OF PARASITIC FREQUENCY MODULATIONS CAUSED BY ECHO SIGNALS ON FREQUENCY RANGE FINDER ERROR ESTIMATING DIFFERENCE FREQUENCIES BASED ON PHASE ADDITIVES METHOD

B. A. Atayants, PhD (technical sciences), General Director, LLC enterprise «KONTAKT-1»; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. M. Davydochkin, PhD (technical sciences), Head of Department, LLC enterprise «KONTAKT-1»; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. V. Ezerskiy, Dr. in technical sciences, PhD, full professor, department of radio control and communication, RSREU; This email address is being protected from spambots. You need JavaScript enabled to view it.

The error of distance measurement caused by parasitic frequency modulation due to the echo signals reflected from useful and interfering objects which influence the generator is considered for frequency range finders measuring difference frequency using phase additive method. The aim of the work is to analyze the influence of parasitic frequency modulation on the distance measurement error made by frequency range finder using phase additives method as well as the comparison of this method with weight and spectral ones. The ratios allowing to make numerical simulation are given. The influence of single interfering factors is considered. The error component caused by parasitic frequency modulation is shown to be one-three orders lower than the analogous one in weight and spectral methods. This error component can be further decreased by choosing the distance to the devices sealing antennawaveguide channel multiplied by the value of signal element with frequency modulation in the process of frequency range finder design.

Key words: frequency range finder, measurement error, phase additives method, influence of parasitic frequency modulation.

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