人工磁导体吸波体设计及其应用
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摘要
对基于涡旋谐振环的人工磁导体(AMC)结构引入介质损耗,得到了一种"高吸波率"吸波体,实现了单一频点2 GHz下较强的窄带吸波;然后加载集总参数元件拓展吸波体的频带宽度,在低频超宽带1.7~2.2 GHz范围实现了90%以上的吸收率,并对其吸波机理进行了分析;最后将宽带吸波体敷设到开缝腔体内壁上抑制腔体谐振,解决了屏蔽腔体的高谐振问题,开辟了超材料的一个新的应用领域。
Introducing dielectric loss to the artificial magnetic conductor( AMC) based on vortex resonance,a perfect microwave absorber is achieved. The structure can realize strong microwave absorbing at the designed frequency which is 2 GHz. With lumped elements loaded to this structure,the frequency band is expand to a broadband range. Specifically,the absorptivity of the improved structure can achieve more than 90 percent at frequency band of 1. 7 ~ 2. 2 GHz. At the same time,the absorbing mechanism is analyzed. Finally,the designed broadband microwave absorber are applied to a slotted cavity,and the simulation results show that the absorber can restrain cavity resonance. The proposed microwave absorber design provides a method for shielding high resonant cavity,and develops a new application filed for metamaterials.
Introducing dielectric loss to the artificial magnetic conductor( AMC) based on vortex resonance,a perfect microwave absorber is achieved. The structure can realize strong microwave absorbing at the designed frequency which is 2 GHz. With lumped elements loaded to this structure,the frequency band is expand to a broadband range. Specifically,the absorptivity of the improved structure can achieve more than 90 percent at frequency band of 1. 7 ~ 2. 2 GHz. At the same time,the absorbing mechanism is analyzed. Finally,the designed broadband microwave absorber are applied to a slotted cavity,and the simulation results show that the absorber can restrain cavity resonance. The proposed microwave absorber design provides a method for shielding high resonant cavity,and develops a new application filed for metamaterials.
引文
1 Landy N I,Sajuyigbe S,Mock J J,et al.Perfect metamateria absorber.Physical Review Letters,2008;100:207402:1-4
2 Tao H,Landy N I,Bingham C M,et al.A metamaterial absorber fo the terahertz regime:design fabrication and characterization.Optic Express,2008;16:7181-7188
3 Tao H,Bingham C M,Pilon D,et al.A dual band terahert metamaterial absorber.Journal of Physics D:Applied Physics,2010;43:225102:1-5
4姚远.非对称开口六边形环及树枝状微波左手材料电磁特征研究.西安:西北工业大学,2007Yao Yuan.Microwave transmission behavior of the singl dissymmetrical hexagonal split-ring resonators and the form o bifurcation resonators.Xi’an:Northwestern Polytechnical University,2007
5屈绍波,王甲富,马华,等.超材料设计及其在隐身技术中的应用.北京:科学出版社,2013Qu Shaobo,Wang Jiafu,Ma Hua,et al.Design of metamaterials design and its application in stealth technology.Beijing:Science Press,2013
6 Chen X,Grzegorczyk T M,Wu B I,et al.Robust method to retrieve the constitutive effective parameters of metamaterials.Phys Rev E,2004;70:016608:1-7
7崔杨.矩形金属腔体屏蔽效能分析.西安:西安电子科技大学,2011Cui Yang.Shielding effectiveness analysis of rectangular metallic enclosure.Xi’an:Xidian University,2011
8邹澎,周晓萍.电磁兼容原理、技术和应用.北京:清华大学出版社,2007Zou Peng,Zhou Xiaoping.Electromagnetic compatibility principle,technology and application.Beijing:Tsinghua University Press,2007
9焦重庆,牛帅.开孔矩形腔体的近场电磁屏蔽效能研究.物理学报,2013;(11):234-242Jiao Chongqing,Niu Shuai.Shielding effectiveness of an aperture rectangular cativity against the near-field electromagnetic waves.Journal of Physics,2013;(11):234-242
10 Dawson L,Marvin A C,Alternative methods of damping resonances in a screened room in the frequency range 30 to 200 MHz.The 6th Int.Conf.EMC.York,England,Sept,1988:217-224
2 Tao H,Landy N I,Bingham C M,et al.A metamaterial absorber fo the terahertz regime:design fabrication and characterization.Optic Express,2008;16:7181-7188
3 Tao H,Bingham C M,Pilon D,et al.A dual band terahert metamaterial absorber.Journal of Physics D:Applied Physics,2010;43:225102:1-5
4姚远.非对称开口六边形环及树枝状微波左手材料电磁特征研究.西安:西北工业大学,2007Yao Yuan.Microwave transmission behavior of the singl dissymmetrical hexagonal split-ring resonators and the form o bifurcation resonators.Xi’an:Northwestern Polytechnical University,2007
5屈绍波,王甲富,马华,等.超材料设计及其在隐身技术中的应用.北京:科学出版社,2013Qu Shaobo,Wang Jiafu,Ma Hua,et al.Design of metamaterials design and its application in stealth technology.Beijing:Science Press,2013
6 Chen X,Grzegorczyk T M,Wu B I,et al.Robust method to retrieve the constitutive effective parameters of metamaterials.Phys Rev E,2004;70:016608:1-7
7崔杨.矩形金属腔体屏蔽效能分析.西安:西安电子科技大学,2011Cui Yang.Shielding effectiveness analysis of rectangular metallic enclosure.Xi’an:Xidian University,2011
8邹澎,周晓萍.电磁兼容原理、技术和应用.北京:清华大学出版社,2007Zou Peng,Zhou Xiaoping.Electromagnetic compatibility principle,technology and application.Beijing:Tsinghua University Press,2007
9焦重庆,牛帅.开孔矩形腔体的近场电磁屏蔽效能研究.物理学报,2013;(11):234-242Jiao Chongqing,Niu Shuai.Shielding effectiveness of an aperture rectangular cativity against the near-field electromagnetic waves.Journal of Physics,2013;(11):234-242
10 Dawson L,Marvin A C,Alternative methods of damping resonances in a screened room in the frequency range 30 to 200 MHz.The 6th Int.Conf.EMC.York,England,Sept,1988:217-224