Super-matching wave-absorbing material formed by utilizing sheeted cross-shaped metal unit structure

Abstract

The invention discloses a super-matching wave-absorbing material formed by utilizing a sheeted cross-shaped metal unit structure. The super-matching wave-absorbing material consists of three layers of materials as follows: the bottom layer is a metal copper sheet, the middle layer is an FR4 printed circuit board and the top layer is composed of a plurality of slotted and sheeted cross-shaped metal copper sheets which are arranged on the middle layer (namely, the FR4 printed circuit board) at equal intervals; and the four opened ends of each cross-shaped metal copper sheet are respectively connected with slotted gaps by resistors. By adjusting the size of the welding resistance value, the sheeted cross-shaped metal unit structure resonates in a specified working frequency, the absorbed energy is consumed on the resistors, and simultaneously the complete matching with the air is realized. For the wave-absorbing material, the structure is simple, the thickness is small, the weight is light, the wave-absorbing efficiency is high, and the wave-absorbing material forms supermatching with the air, can be widely used for various military fields such as invisibility of aircrafts, naval vessels, radars, tanks and the like, as well as the civil fields such as electromagnetic shielding and electromagnetic protection.

Description

technical field [0001] The invention relates to an electromagnetic wave absorbing material, in particular to a super-matching absorbing material made of sheet-shaped cross-shaped metal unit structure. Background technique [0002] Microwave absorbing material, referred to as microwave absorbing material, is a functionally compatible material that can effectively absorb incident radar waves and greatly attenuate its scattering. The new generation of absorbing materials requires strong attenuation capability, wide absorption frequency band, light weight, infrared and microwave absorption compatibility, and excellent comprehensive mechanical properties. Among them, the main application fields of absorbing materials are military and civilian fields. [0003] The field of military stealth is the most important application field of absorbing materials. With the rapid development of military high-tech, the detection, tracking and attack capabilities of the defense systems of a...

AI Technical Summary

Problems solved by technology

Foreign scholars proposed the use of photonic crystals to achieve ultra-thin absorbing structures, N. Engheta first proposed the idea of ​​using metamaterial to obtain ultra-thin absorbing materials. J, D. J. Kern et al. used lossy frequency selective surface (HZFSS) to realize ultra-thin broadband absorbing material, but the design method is relatively complicated and it is difficult to be applied in practice.

Images