结构吸波材料多层阻抗渐变设计及应用
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摘要
对多层阻抗渐变的吸波结构设计思想进行了分析,介绍了多层阻抗渐变思想在吸波层板和泡沫两类结构吸波材料设计上的应用。理论计算与试验验证结果均表明,采用多层阻抗渐变设计能够使吸波层板和泡沫的吸波带宽向低频拓展,同时显著提高吸波泡沫的吸收强度。具有三个阻抗渐变吸收层的4 mm厚吸波层板在5~18 GHz频段反射率小于-10 d B;具有六个阻抗渐变吸收层的22 mm厚吸波泡沫在2~18 GHz频段反射率小于-10 d B,其中在6~18 GHz频段反射率小于-20 d B,8~12 GHz频段反射率小于-30 d B。多层阻抗渐变设计是提高结构吸波材料吸波性能的有效手段。
The design theory of absorbing structure with multilayer graded impedance is summarized and its application in design of absorbing laminate and foam is introduced in this paper. Both calculation and experiment show that design of multilayer graded impedance can extend absorbing bandwidth of the laminate and foam to low frequency and enhance absorbing efficiency of the foam. Reflectivity of the 4 mm thick laminate with three layers of graded impedance is less than- 10 d B between 5 GHz and 18 GHz. Reflectivity of the 22 mm thick foam with six layers of graded impedance is less than- 10 d B between 2 GHz and 18 GHz,is less than- 20 d B between 6 GHz and 18 GHz,and is less than- 30 d B between 8 GHz and 12 GHz. Design of multilayer graded impedance is an effective method for enhancing the absorbing properties of structural radar absorbing materials.
The design theory of absorbing structure with multilayer graded impedance is summarized and its application in design of absorbing laminate and foam is introduced in this paper. Both calculation and experiment show that design of multilayer graded impedance can extend absorbing bandwidth of the laminate and foam to low frequency and enhance absorbing efficiency of the foam. Reflectivity of the 4 mm thick laminate with three layers of graded impedance is less than- 10 d B between 5 GHz and 18 GHz. Reflectivity of the 22 mm thick foam with six layers of graded impedance is less than- 10 d B between 2 GHz and 18 GHz,is less than- 20 d B between 6 GHz and 18 GHz,and is less than- 30 d B between 8 GHz and 12 GHz. Design of multilayer graded impedance is an effective method for enhancing the absorbing properties of structural radar absorbing materials.
引文
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[8]谢炜,程海峰,楚增勇,等.以中空多孔碳纤维为主体的轻质吸波材料吸波性能研究[J].无机材料学报,2009,24(2):320-324
[9]邹春田,赵乃勤,师春生,等.活性碳纤维/树脂复合吸波材料的设计[J].功能材料与器件学报,2007,13(1):54-58
[10]车孟刚,杨建生,聂嘉阳,等.多层蜂窝夹芯结构吸波材料电匹配设计研究[J].宇航材料工艺,1989(4/5):74-78
[11]何山,熊克敏.雷达罩内用泡沫型吸波材料研究[J].航空材料学报,2001,21(3):19-23
[12]张立中.宽频结构型微波吸收材料的设计研究[J].导弹与航天运载技术,1995(4):48-54
[2]李承祖,田成林.多层吸波和多层透波材料阻抗匹配问题研究[J].国防科技大学学报,1991,13(4):66-73
[3]何燕飞,龚荣洲,何华辉.双层吸波材料吸波特性研究[J].功能材料,2004,35(6):782-784
[4]何燕飞,龚荣洲,李享成,等.多层复合吸波材料的制备及其吸波性能[J].无机材料学报,2006,21(6):1449-1453
[5]胡传炘.隐身材料技术[M].北京:化学工业出版社,2004
[6]黄远,李家俊,马铁军,等.一种新型结构吸波材料的设计与制备[J].兵器材料科学与工程,1999,22(4):7-12
[7]黄远,李家俊,马铁军,等.利用碳纤维毡制备结构吸波材料的研究[J].复合材料学报,2000,17(1):28-31
[8]谢炜,程海峰,楚增勇,等.以中空多孔碳纤维为主体的轻质吸波材料吸波性能研究[J].无机材料学报,2009,24(2):320-324
[9]邹春田,赵乃勤,师春生,等.活性碳纤维/树脂复合吸波材料的设计[J].功能材料与器件学报,2007,13(1):54-58
[10]车孟刚,杨建生,聂嘉阳,等.多层蜂窝夹芯结构吸波材料电匹配设计研究[J].宇航材料工艺,1989(4/5):74-78
[11]何山,熊克敏.雷达罩内用泡沫型吸波材料研究[J].航空材料学报,2001,21(3):19-23
[12]张立中.宽频结构型微波吸收材料的设计研究[J].导弹与航天运载技术,1995(4):48-54