Measurement of small phase shifts of radio signals using acoustooptic reduction View Full Text


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Article Info

DATE

1992-03

AUTHORS

V. A. Zubov, T. T. Sultanov, A. F. Tavasiev, A. N. Torgashin

ABSTRACT

Results are presented of model-based experimental investigations of an interference correlator intended for the measurement of small phase shifts of radar signals received from two antennas. The correlator is based on a Mach-Zender interferometer system. Introduction of a radio signal for the data reduction was simulated by phase diffraction gratings placed in the interferometer arms and displaced relative to one another. The operation of the system was investigated in a regime with measurements in the region of the extrema of the correlation function and in a regime with measurements near zeros (extrema of the derivative) of the correlation function. The investigations were carried out for signals formed in first, second, and third order of diffraction. It is shown that the sensitivity of the system for measurements in the region of a correlation-function zero is higher by an order of magnitude than in the extrem~ m region. It is shown that for radio signals in the 100-MHz band, with allowance for the experimental measurement error, the accuracy of determining the time delays reaches 10−11 sec. The accuracy with which geometric displacements of diffraction gratings are determined reaches 5·10-5 mm. More... »

PAGES

140-151

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01125510

DOI

http://dx.doi.org/10.1007/bf01125510

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005017476


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