玻璃纤维板阵列增多层吸波复合结构  

A multilayered microwave absorbing composite structure enhanced by fiberglass enforced epoxy laminate array

作　　者：麻晢乂培 黎嘉乐 姜超 MA Zhe-yi-pei;LI Jia-le;JIANG Chao(Powder Metallurgy Research Institute,Central South University,Changsha 410083,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]Powder Metallurgy Research Institute,Central South University,Changsha 410083,China [2]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China

出　　处：《Journal of Central South University》2024年第2期384-398,共15页中南大学学报（英文版）

基　　金：Project(202045002)supported by the Initial Research Funding for Special Associate Professor of Central South University,China;Project(2021RC3003)supported by the Science and Technology Innovation Talents Program of Hunan Province,China;Project(2022-JCJQ-ZD-01-1)supported by the Basic Strengthening Research Sub-project of China;Project(CX 20220163)supported by the Postgraduate Innovation Project of Hunan Province,China。

摘　　要：本文将电路模拟吸波阵列与玻璃纤维介质板(FEPL)阵列结合,采用真空热压成型工艺制备了一种具有超宽带强吸波性能的多层复合结构。整个FEPL阵列复合结构的表面密度约为2.4 kg/m^(2),厚度约为10.0 mm。仿真和测量结果均表明,FEPL阵列可以明显改善吸波结构的斜入射角的稳定性,提高电磁吸收率,拓宽吸收带宽。在斜入射角40°~60°范围内,FEPL阵列显著提高了吸波复合结构的吸收性能,同时将相对带宽(FBW)拓宽了约9.1%;此外,它还将复合吸波结构正入射角的平均反射系数从−14.4 dB降低到了−25.7 dB,降低了约11.3 dB。本文所提出的玻璃纤维板阵列增多层吸波复合结构性能优异,制备工艺简单,适合实际工程应用。A multilayered composite structure with ultra-wideband and strong microwave absorbing performance has been developed,which is prepared through vacuum bag molding process,and the fiberglass enforced epoxy laminate(FEPL)array on its surface is fabricated by computer numerical control(CNC)carving method.The surface density of the whole composite structure with FEPL array is about 2.4 kg/m^(2),and the thickness is about 10.0 mm.Both simulation and measurement results confirm that FEPL array can considerably improve stability of the incidence angle,increase absorptivity,and broaden the absorption bandwidth.The FEPL array enhances the oblique incidence performance of the composite structure ranging from 40°to 60°,while simultaneously expanding the fractional bandwidth(FBW)by approximately 9.1%.Moreover,it achieves a notable reduction in the average reflection coefficient at normal incidence,decreasing it by about 11.3 dB from−14.4 dB to−25.7 dB.High performance and simple preparation processes for composite structure indicate that it is suitable for practical engineering applications.

关 键 词：超宽带 微波吸收复合材料 玻璃纤维板阵列 电路模拟吸波体 

分 类 号：TB33[一般工业技术—材料科学与工程]