A. D. Vinogradov
Air Force Academy named after professor N.E. Zhukovsky and Y.A. Gagarin (Voronezh, Russia)

Sign-alternating dependences of the polarization errors of vector low-base radio direction finders, which implement the amplitude and amplitude-phase methods of radio direction finding using a three-element loop-dipole antenna array and the formation of direction finding functions by the Watson–Watt method, on the polarization of electromagnetic waves and electrical parameters of the earth surface have been obtained. It has been shown that the signs of polarization errors of vector amplitude and amplitude-phase radio direction finders are determined by the value of the cosine of the phase difference between the horizontally and vertically polarized components of the resulting electromagnetic field in the phase center of the loop-dipole antenna array, which depends on the polarization of the incident electromagnetic wave and the electrical parameters of the earth surface, and the signs of polarization errors of vector amplitude radio direction finders, in addition, depend on the direction of propagation of the electromagnetic wave in the horizontal plane. Sign-alternating dependences of the polarization errors of scalar short-based radio direction finders with a four-element equidistant loop antenna array of mutually orthogonal direction finding pairs of antennas and the formation of a direction finding function by the Watson–Watt method on the polarization of electromagnetic waves and electrical parameters of the earth surface, taking into account lines of mutually orthogonal direction finding pairs of antennas, have been validated.

Vinogradov A.D. Polarization errors of short-spaced radio direction finders with formation of direction-finding functions according to the Watson–Watt method. Antennas. 2022. № 2. P. 34–46. DOI: https://doi.org/10.18127/j03209601-202202-05 (in Russian)

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