Characteristics of backscattering at high angles of incidence of TM-polarization plane waves on an extended metal plate with a radio-absorbing coating based on the structure of an artificial magnetic conductor

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Abstract

The results of numerical calculation of backscattering at large angles of incidence of TM-polarization plane waves on an extended metal surface of finite dimensions with a radio-absorbing coating based on the structure of an artificial magnetic conductor are presented. It is shown that a coating of this type with a thickness of 1...2 mm makes it possible to lower by 10...30 dB the first (from large angles) maximum on the angular dependence of backscattering at ultrahigh frequencies in a band of the order of an octave.

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About the authors

Yu. N. Kazantsev

Kotelnikov Institute of Radioengineering and Electronics, RAS

Author for correspondence.
Email: yukazantsev@mail.ru

Fryazino Branch

Russian Federation, Vvedenskii Squar., 1, Fryazino, Moscow oblast, 141190

G. A. Kraftmakher

Kotelnikov Institute of Radioengineering and Electronics, RAS

Email: yukazantsev@mail.ru

Fryazino Branch

Russian Federation, Vvedenskii Squar., 1, Fryazino, Moscow oblast, 141190

V. P. Mal’tsev

Kotelnikov Institute of Radioengineering and Electronics, RAS

Email: yukazantsev@mail.ru

Fryazino Branch

Russian Federation, Vvedenskii Squar., 1, Fryazino, Moscow oblast, 141190

V. S. Solosin

Kotelnikov Institute of Radioengineering and Electronics, RAS; Institute of Theoretical and Applied Electrodynamics, RAS

Email: yukazantsev@mail.ru

Fryazino Branch

Russian Federation, Vvedenskii Squar., 1, Fryazino, Moscow oblast, 141190; Izhorskaya Str., 13, Moscow, 125412

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2. Fig. 1. Scheme of the RFP: 1 — frequency-selective grating, 2 — dielectric layer, 3 — metal screen.

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3. Fig. 2. Variants of frequency-selective array elements (dimensions in mm).

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4. Fig. 3. Frequency dependences of the reflection coefficient of TM-polarized plane waves from a metal surface with a RPP (see parameters in Table 1 for Fig. (a), (b) and (c)) at φ = 70 (1), 75 (2), 80 (3) and 85 degrees (4).

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5. Fig. 4. Metal plate with a plane TM wave incident on it.

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6. Fig. 5. Angular characteristics of backscattering from a metal plate 412 mm long and 51.5 mm wide at f = 3.5 (a), 4 (b), 4.407 (c), 5 (d), 6 (d) and 7 GHz (e): curve 1 — without a backscattering element, curve 2 — with a backscattering element 2 mm thick and ε = 5(1-j0.428).

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7. Fig. 6. Angular characteristics of backscattering from a metal plate 2060 mm long and 51.5 mm wide at f = 2.5 (a), 3.1 (b), 4 (c) and 5 GHz (d): curve 1 — without a backscattering plate, curve 2 — with a backscattering plate 2 mm thick and ε = 10.2(1-j0.661).

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8. Fig. 7. Angular characteristics of backscattering from a metal plate 6180 mm long and 51.5 mm wide at f = 3 (a), 4 (b), 5 (c) and 6 GHz (d): curve 1 — without a backscattering plate, curve 2 — with a backscattering plate 1 mm thick and ε = 10.2(1-j0.724).

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