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Wide-band RCS reduction super surface based on slit loading

A super-surface and broadband technology, applied in the direction of electrical components, antenna supports/mounting devices, antennas, etc., can solve the problems of high cost, high cost, increase target weight and thickness, etc., achieve good reduction effect, polarization insensitivity, The effect of simple structure

Pending Publication Date: 2018-08-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the aerodynamic limitations of fast-flying targets, achieving RCS reduction through shape design will cause a sharp drop in target maneuverability. At the same time, multi-layer coating RAM will increase the weight and thickness of the target. In addition, it can be compared with multi-band high-absorption RAM. Expensive, making it costly in targeted stealth applications
Relevant data show that the B-2 and F-22 need to replace the RAM every time they fly, and each replacement takes 35 hours, which is very expensive

Method used

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  • Wide-band RCS reduction super surface based on slit loading
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  • Wide-band RCS reduction super surface based on slit loading

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0032] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0033] Such as figure 1 As shown, the broadband RCS reduced metasurface is a two-dimensional finite-size structure, which is formed by the first AMC superunit and the second AMC superunit in a plane-staggered array;

[0034] The first AMC superunit and the second AMC superunit are respectively square AMC superunits arranged in a 3×3 chessboard form by the first AMC unit and the second AMC unit;

[0035] The first AMC unit and the second AMC unit are squares of the same size, and both...

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Abstract

The invention discloses a wide-band RCS reduction super surface based on slit loading, comprising a dielectric substrate, a metal patch for loading a gap and a metal floor. The metal patch loaded witha plurality of pairs of cross-shaped slits is printed on the upper surface of the dielectric substrate, and the metal floor is printed on the lower surface of the dielectric substrate. An artificialmagnetic conductor unit is designed to have a resonant frequency of 12 GHz, and the in-phase reflection relative bandwidth is 50%. At the same time, broadband AMC super units and double-ring AMC superunits are arranged according to a 3*3 chessboard manner at intervals. Each kind of AMC super units consists of 3*3 basic AMC units, and finally RCS reduction of 7.5 dB or more in the frequency rangeof 8 to 19.2 GHz is realized. The artificial magnetic conductor structure and the AMC-AMC checssboard-shaped electromagnetic stealth surface of the invention have the advantages of good robustness, polarization insensitivity and the like.

Description

technical field [0001] The invention relates to the field of radar stealth technology, in particular to a wideband RCS reduction metasurface based on slot loading. Background technique [0002] With the rapid development of detection technology and electromagnetic stealth technology, stealth characteristics have gradually become an important indicator to measure the performance of flying targets, and reducing the radar cross section (Radar Cross Section, RCS) of targets has become a key factor in modern warfare. The traditional stealth technology mainly realizes the reduction of RCS by changing the shape of the flying target and coating the radar absorbing material (RAM). 4 layers of RAM to maximize RCS reduction. F-22 Raptor is also used in a similar way to achieve radar stealth. However, due to the aerodynamic limitations of fast-flying targets, achieving RCS reduction through shape design will cause a sharp drop in target maneuverability. At the same time, multi-layer co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/18H01Q15/24
CPCH01Q1/18H01Q15/24
Inventor 葛越陈嘉卿陈晓锋于步云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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