G.N. Tkachev1, O.V. Karpenko2, A.E. Suchkov3, V.N. Shvedov4

1–4 JSC «DRSRI» (Moscow, Russia)
 

For over-the-horizon radar stations (ZG) of spatial wave with linear antenna arrays, a difficult problem to solve is the effect of multiray (multipath) propagation, when the signal from one observation object comes to the receiver with different delays, at different site angles, and, under certain conditions, with different azimuths and Doppler frequency shifts. The effect of multipath propagation leads to a multiplication of traces of observation objects. To reduce (exclude) the effect of multipath on the trace characteristics of observation objects, it is necessary to provide, as a minimum, separate reception of each component of the echo signal from the radiolocation object, including the angle of arrival (by angle of location) at the receiving antenna. The article analyzes the possibilities of using multi-ring receiving phased array antenna of the near-surface type of vertical polarization for measuring the angle of arrival (angle of location) in a spatial wave radar. The possibilities of forming a "fan" of directional patterns along the azimuth and location angle using a digital phased array of the considered type and their characteristics: width of the directional diagram, LFL and the level of side lobes are evaluated.Proposed technical solution for receiving antenna opens up new possibilities for improving algorithms of information processing (flow of marks from observation objects), which as the result will improve a number of trace characteristics of over-the-horizon radars of spatial wave.

Tkachev G.N., Karpenko O.V., Suchkov A.E., Shvedov V.N. The possibilities of implementing measurements of the angle of the place in the ZG of the spatial wave radar. Science Intensive Technologies. 2022. V. 23. № 5. P. 34−40. DOI: https://doi.org/10.18127/j19998465-202205-05 (in Russian)

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