A.I. Semenikhin – Ph.D. (Eng.), Associate Professor of the Antennas and Radio Transmitters Department Scopus ID 55361276300; Researcher ID B-5893-2017; SPIN 5609-3793

E-mail: anilsem@mail.ru

P.V. Blagovisnyy – Engineer; Postgraduate of the Antennas and Radio Transmitters Department  of the Radio engineering systems and control institute of the Southern Federal University

E-mail: ne-rio@yandex.ru

A.V. Malinka – Ph.D. (Military), Head of a Department 

E-mail: 9773878095@mail.ru

A.O. Tektinov – Engineer 

The working band of the radio-cloaking covers based on non-absorbing metasurfaces (meta-coatings - MCs) is traditionally determined by the level of radar cross section (RSC) reduction minus 10 dB. Wherein, normal irradiation by electro-magnetic (EM) wave at two main planes was usually considered.

The actual problem is to reduce the monostatic RCS of objects more effectively, that are irradiated upon the EM wave with different linear polarizations. For this, it is proposed to use thin non-absorbing digital 2-bit MCs with an anisotropic metasurface based on meta-particles - «eights». The developed MCs differ from known ones, that have been considered by other authors, with the topology of metaparticles and the block principle of meta-coatings' modules placing.

The aim of this work is to numerically and experimentally study the monostatic RCS of two (type I and type II) developed thin nonabsorbing digital 2-bit flat anisotropic meta-coatings with a more efficient (>10 dB) reduction of RCS in a wide frequency band when irradiating upon a wave with different linear polarizations. 

When solving the tasks defined, the HFSS and Octave programs were used to calculate monostatic co-RCS of full-wave and impedance models of the MCs respectively. The experiment was carried out in the anechoic chamber of the Southern Federal University. Calculated and measured monostaic co-RCS reduction levels of the developed digital 2-bit anisotropic MCs (type I and type II) were at least 12,5 - 13,5 dB at different consonant polarizations in the band from 10,2 to 17,5 GHz and above. The measured frequency response and frequency response calculated by the finite element method and the physical optics method are in good agreement, which indicates the adequacy of the proposed models.

Thus, on the basis of the obtained experimental and numerical results, it can be concluded that the proposed 2-bit digital metacovers are applicable to reduce the monostatic co-RCS of flat areas of metal objects by at least 12.5 dB in the band from 10.2 to 17.5 GHz and above.

Semenikhin A.I., Blagovisnyy P.V., Malinka A.V., Tektinov A.O. Experimental and numerical studies of the monostatic RCS reduction efficiency of the non-absorbing digital 2 bit planar meta-covers. Radiotekhnika. 2020. V. 84.  № 10(20). P. 64−76. DOI: 10.18127/j00338486-202010(20)-08 (In Russian).

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