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Telecommunications and Radio Engineering

ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering


pages 1-24

WAVE PROPAGATION AND SCATTERING
Experimental Investigation of Microwave -Frequency Radar Signals Scattered by the Sea Surface

I. D. Gontar
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., Kharkiv 61085
F. V. Kivva
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085
V. Yu. Ryazantsev
V. B. Sinitski
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
Ivan S. Turgenev
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
Stanislav I. Khomenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine

ABSTRACT

The problem of rejecting the interference of natural origin in high potential radar complexes operating over the sea is of great practical importance. Radar returns from the rough sea account for the major share of the interference, along with meteorological factors, angel clutter and birds. The scattering occurs from various ranges at all grazing angles and can be observed over a wide frequency range. This article presents the results of research of sea clutter carried out in the Institute of Radiophysics and Electronics, National Academy of Sciences of Ukraine for over 20 years. The research concerns the most interesting range of small grazing angles which are characteristic of most of ship and borne coastal radars. The main attention is given to the experimental study of the parameters of radio signals reflected from the sea surface, such as the specific radar cross-section and spectral characteristics. The results obtained are discussed in terms of the known theories and compared with the data of other writers. The measurements were carried out with prototypes of high potential radars at the wavelengths from 3.2 cm to 2 m on the Black Sea coast (towns of Gelendzhik and Sudak). In a number of cases parallel measurements of the sea roughness and wind characteristics were performed, as well as meteorological measurements in the lower layer of the troposphere.