微波衰减用随机复合超材料的电磁参数调控
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- 论文作者：范润华 ; 史志成 ; 张子栋 ; 钱磊 ; 党锋 ; 刘尧 ; 孙凯
- 年：2016
- 作者机构：山东大学材料加工教育部重点实验室;上海海事大学海洋学院材料系;中国海洋大学材料科学与工程研究院;
- 论文关键词：超材料 ; 微波衰减 ; 负介电常数 ; 负磁导率
- 会议召开时间：2016-08-23
- 会议录名称：2016真空电子学分会第二十届学术年会论文集（下）
- 语种：中文
- 分类号：TB33
- 学会代码：ZKDZ
- 会议名称：2016真空电子学分会第二十届学术年会
- 会议地点：中国福建厦门
- 主办单位：中国电子学会真空电子学分会、微波电真空器件国家级重点实验室
- 学会名称：中国电子学会真空电子学分会
- 页数：5
- 文件大小：740k
- 原文格式：D
- 会议级别：全国
摘要
近年来,基于超材料独特的负介电常数和负磁导率行为,使其在微波吸收与衰减领域得到了广泛的关注。负介电常数、负磁导率及其衍生的新颖特性在超材料中被发现后,随机复合超材料是否具有类似性质倍受关注。主要利用原位合成技术制备了金属陶瓷等异质复合材料,通过功能体优化筛选和显微结构有效剪裁,在射频频段获得了负介电常数和负磁导率。研究表明,自由电子的等离体振荡导致了负介电常数,逾渗行为具有决定性影响:亚逾渗组分复合材料的介电常数为正值,频散特征符合德拜弛豫;超过但仍接近逾渗阈值组分的复合材料,介电常数为负值,特征是法诺共振。负磁导率主要归因于磁共振。与典型的超材料相比,随机复合超材料在工艺技术方面具有优势,其双负性质的发现,为吸波、屏蔽、透波、无线输电等应用领域电磁参数调控提供了新的思路。
引文
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[2]黄吉平.从光学隐身衣到热学隐身衣——神奇的热学超构材料简介[J].物理教学,2015,5:001.
[3]齐美清,崔铁军.一种缩减雷达散射截面的编码超材料[C]//2015年全国微波毫米波会议论文集.2015.
[4]顾超,屈绍波,裴志斌,等.基于电阻膜的宽频带超材料吸波体的设计[J].物理学报,2011,60(8):662-666.
[5]刘凌云,胡长寿,郭彪.超材料吸波体吸波特性研究[J].材料导报,2010,24(5):1-3.
[6]程用志,聂彦,龚荣洲,等.基于超材料与电阻型频率选择表面的薄型宽频带吸波体的设计[J].物理学报,2012,61(13):134101-134101.
[7]Shelby R A,Smith D R,Schultz S.Experimental verification of a negative index of refraction[J].Science,2001,292(5514):77-79
[8]Gao M,Shi Z,Fan R,et al.High-Frequency Negative Permittivity from Fe/Al_2O_3 Composites with High Metal Contents[J].Journal of the American Ceramic Society,2012,95(1):67-70.
[9]Shi Z,Chen S,Sun K,et al.Tunable radio-frequency negative permittivity in nickel-alumina“natural”meta-composites[J].Applied Physics Letters,2014,104(25):252908.
[10]Shi Z,Chen S,Fan R,et al.Ultra low percolation threshold and significantly enhanced permittivity in porous metal-ceramic composites[J].Journal of Materials Chemistry C,2014,2(33):6752-6757.
[11]Sun K,Zhang Z D,Qian L,et al.Dual percolation behaviors of electrical and thermal conductivity in metal-ceramic composites[J].Applied Physics Letters,2016,108(6):061903.
[12]Sun K,Zhang Z,Fan R,et al.Random copper/yttrium iron garnet composites with tunable negative electromagnetic parameters prepared by in situ synthesis[J].RSC Advances,2015,5(75):61155-61160.
[13]Sun K,Fan R H,Zhang Z D,et al.The tunable negative permittivity and negative permeability of percolative Fe/Al_2O_3composites in radio frequency range[J].Applied Physics Letters,2015,106(17):172902.
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[24]Yan K,Fan R,Shi Z,et al.Negative permittivity behavior and magnetic performance of perovskite La_(1-x)Sr_xMnO_3 at high-frequency[J].Journal of Materials Chemistry C,2014,2(6):1028-1033.
[25]毕科,周济,赵宏杰,李勃.基于铁磁共振的超材料研究进展[J].科学通报,2013,58(19):1785-1795.
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[30]Liu B,Zhao X,Zhu W,et al.Multiple Pass-Band Optical Left-Handed Metamaterials Based on Random Dendritic Cells[J].Advanced Functional Materials,2008,18(21):3523-3528.
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