Radio absorption in structures like artificial magnetic conductors at large angles of incidence of TM-polarized waves

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Abstract

The frequency-angular characteristics of the reflection of TM-polarized waves from thin (thickness up to 1/200 wavelength) artificial magnetic conductor (AMC) and radio absorber (RA) based on band-reflecting and band-passing gratings are presented. It is shown that the operating frequency bands of the AMC and RA expand tens of times when the angle of incidence changes from 0 to 89 degrees. In this case, the value of the ratio (is the difference in wavelengths at the edges of the absorption band and is the thickness of the RA) increases to 30.

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About the authors

Yu. N. Kazantsev

Kotelnikov Institute of Radioengineering and Electronics Russian Academy of Sciences

Author for correspondence.
Email: yukazantsev@mail.ru

Fryazino branch

Russian Federation, Fryazino Moscow oblast, 141190

G. A. Kraftmakher

Kotelnikov Institute of Radioengineering and Electronics Russian Academy of Sciences

Email: yukazantsev@mail.ru

Fryazino branch

Russian Federation, Fryazino Moscow oblast, 141190

V. P. Mal'tsev

Kotelnikov Institute of Radioengineering and Electronics Russian Academy of Sciences

Email: yukazantsev@mail.ru

Fryazino branch

Russian Federation, Fryazino Moscow oblast, 141190

V. S. Solosin

Kotelnikov Institute of Radioengineering and Electronics Russian Academy of Sciences; Institute of Theoretical and Applied Electrodynamics

Email: yukazantsev@mail.ru

Fryazino branch

Russian Federation, Fryazino Moscow oblast, 141190; Moscow, 125412

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Supplementary files

Supplementary Files
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1. JATS XML
2. Fig. 1. IMP diagram: 1 – frequency-selective grating, 2 – dielectric layer of thickness D, 3 – metal screen, ϑ – angle of incidence of electromagnetic wave.

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3. Fig. 2. Three types of frequency-selective grating elements: band-reflecting 1 and 2 and band-pass 3.

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4. Fig. 3. Frequency-angular dependences of the phase of the reflection coefficient from the IMF based on gratings with elements of three standard sizes 1 (a), 2 (b) and 3 (c). The incidence angles ϑ are 89° (1), 88° (2), 87° (3), 85° (4), 83° (5), 80° (6), 60° (7) and 0° (8).

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5. Fig. 4. Frequency-angular dependences of the reflection coefficient from the RP IMF based on gratings with elements of three standard sizes 1 (a), 2 (b) and 3 at the optimal value of tgδ of the dielectric layer and ϑ = 80° (1), 85° (2), 87° (3), 88° (4) and 89° (5).

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6. Fig. 5. Frequency-angular dependences of the reflection coefficient from the RP IMF based on a grating with elements 1 at a fixed value of tgδ = 0.112 of the dielectric layer and ϑ = 85° (1), 86° (2), 87° (3), 88° (4) and 89° (5).

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7. Fig. 6. Rectangular waveguide, on the wide walls of which an RP IMP based on band-reflecting gratings with elements 1 is placed.

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8. Fig. 7. Frequency dependence of the transmission coefficients S1,2 and reflection coefficients S1,1 of a waveguide with a RP IMP based on band-reflecting gratings with elements 1.

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