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Wide-angle polarization-insensitive low RCS meta-material wave absorber

A wave absorber, wide-angle technology, applied in the direction of electrical components, antennas, etc., can solve the problems of incident angle and polarization sensitivity, and achieve the effect of compact arrangement

Inactive Publication Date: 2015-06-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2008, Landy [Landy N I, Sajuyigbe S, Mock J J, et al. Perfect metamaterial absorber, Physical Review Letters, 2008, 100(20): 207402.] proposed a perfect metamaterial absorber, but this super Material absorbers are sensitive to angle of incidence and polarization

Method used

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  • Wide-angle polarization-insensitive low RCS meta-material wave absorber

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Embodiment

[0025] A wide-angle polarization-insensitive low-RCS metamaterial absorber, as Figure 6 As shown, the absorber is composed of 10×10 basic units. A basic unit includes a metal floor, FR4 dielectric substrate and four double-slit resonant rings with rotational symmetry. The FR4 dielectric substrate is glued on the metal floor, and the rotational symmetry The four double-split resonant rings are bonded on the FR4 dielectric substrate; the double-split resonant rings include an outer split resonant ring and an inner split resonant ring; the metal floor is a metal copper plate;

[0026] The schematic diagram of the structure of four double split resonators with rotational symmetry is shown in figure 1 shown;

[0027] The dielectric constant of the FR4 dielectric substrate is 4.4, the thickness h=0.8mm, the side length of the outer opening resonant ring l=2.22mm, the metal line width w=2mm, the distance between the double opening resonant rings d=0.2mm, and the outer opening reson...

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Abstract

The invention relates to a wide-angle polarization-insensitive low RCS (Radar Cross Section) meta-material wave absorber. The wide-angle polarization-insensitive low RCS meta-material wave absorber is applied to great reduction of a target echo, thereby achieving the stealth characteristic of a target. A basic unit of the wave absorber consists of four double-opening resonant rings which are rotationally symmetric, the transmission number of a meta-material unit in a working band is 0, the minimum reflection coefficient is minus 18.75dB, the maximum wave absorption rate is 98.9 percent, and a perfect wave absorbing effect is achieved. The TE and TM polarization incident wave within a range of minus 60 degrees to 60 degrees can be absorbed, the maximum decrement of an RCS in the working band can reach 12.35dB, and the effective stealth of the radar target is achieved.

Description

technical field [0001] The invention relates to a wide-angle polarization-insensitive metamaterial wave absorber with low radar cross-section (RCS). The system is suitable for greatly reducing target echo and realizing target stealth and other characteristics. Background technique [0002] With the development of modern ultra-wideband and over-the-horizon radar technology, the survival and penetration capabilities of radar targets have been seriously threatened. In order to rapidly improve the low detectability of radar targets, various target stealth technologies have been studied in depth, and the key to achieve stealth is to minimize the radar cross section (RCS) of the target. [0003] To this end, researchers have conducted a lot of research and proposed several effective methods. At present, there are three basic ways to reduce RCS: directly absorbing the incident wave, counteracting the electromagnetic field generated by the target and guiding the incident wave to pr...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
Inventor 司黎明冯佳琦张庆乐胡伟东金宇婷吕昕
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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