非均匀结构超材料天线罩的研究
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摘要
提出了一种非均匀排列超材料结构.通过理论计算,该结构在Ku频段内的等效相对介电常数可以控制在0到1之间.该结构可用于天线罩提高天线的增益.分别对单个微带天线、2×2微带阵列天线、4×4微带阵列天线3种情况加载超材料天线罩的效果进行仿真.仿真结果表明:超材料天线罩对提高天线及天线阵增益的效果随着天线单元数的增加而减弱,如单个微带天线增益可提高6dB,而4×4微带阵列天线增益的提高只有1.6dB.
A kind of metamaterial with inhomogenous structure was designed.Its equivalent relative permittivity in Ku band can be controlled between 0and 1by theoretical calculation.This structure is used as a radome to improve the antenna gain.We put the metamaterial radome on the single microstrip antenna,2×2microstrip array antenna,4×4microstrip array antenna respectively and simulate them in HFSS.The simulation results show that the improvement on the single microstrip antenna and array antenna weaken as the increase of antenna unit,such as the enhancement of gain on the single microstrip antenna is 6dB,while the 4×4microstrip array antenna is only 1.5dB.
A kind of metamaterial with inhomogenous structure was designed.Its equivalent relative permittivity in Ku band can be controlled between 0and 1by theoretical calculation.This structure is used as a radome to improve the antenna gain.We put the metamaterial radome on the single microstrip antenna,2×2microstrip array antenna,4×4microstrip array antenna respectively and simulate them in HFSS.The simulation results show that the improvement on the single microstrip antenna and array antenna weaken as the increase of antenna unit,such as the enhancement of gain on the single microstrip antenna is 6dB,while the 4×4microstrip array antenna is only 1.5dB.
引文
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[2]Pendry J B,Holden A J,Robbins D J,et al.Magnetism from conductors and enhanced nonlinear phenomena[J].Microwave Theory and Techniques,IEEE Transactions on,1999,47(11):2075-2084.
[3]Pendry J B,Holden A J,Robbins D J,et al.Low frequency plasmons in thin-wire structures[J].Journal of Physics:Condensed Matter,1998,10(22):4785.
[4]Pendry J B.Negative refraction makes a perfect lens[J].Physical review letters,2000,85(18):3966.
[5]Baccarelli P,Burghignoli P,Lovat G,et al.Surface-wave suppression in a double-negative metamaterial grounded slab[J].Antennas and Wireless Propagation Letters,IEEE,2003,2(1):269-272.
[6]朱忠奎,罗春荣,赵晓鹏.一种新型的树枝状负磁导率材料微带天线[J].物理学报,2009,58(9):6152-6157.
[7]赵晓鹏,张燕萍,刘亚红,等.基于完全吸收超材料的高增益微带天线[J].电波科学学报,2012,2:035.
[8]保石,罗春荣,赵晓鹏.S波段超材料完全吸收基板微带天线[J].物理学报,2011,60(1):014101.
[9]Chacko B P,Augustin G,Denidni T A.A high-gain antenna based on zero-index metamaterial superstrate[C].Antennas and Propagation Society International Symposium(APSURSI),2013IEEE,Nanjing,2013.
[10]郭林燕,杨河林,李敏华,等.单方环结构左手材料微带天线[J].物理学报,2012,61(1):14102.
[11]Shavit R,Joffe R,Falek E.Planar Ka band antenna for satellite communication based on metamaterial technology[C].Tel Aviv:Microwaves,Communications,Antennas and Electronics Systems(COMCAS),2013IEEE International Conference on.IEEE,2013:1-3.
[12]蒲天乐,黄卡玛,王波.基于零折射率超材料的新型匹配高增益贴片天线[J].四川大学学报:工程科学版,2011,43(2):116-120.
[13]黄勇军,文光俊,李天倩,等.电磁超材料中负磁导率对负介电常数的影响[J].强激光与粒子束,2010,22(10):2457-2460.
[14]王甲富,屈绍波,徐卓,等.基于金属结构单元间耦合的左手材料的设计及实验验证[J].物理学报,2010,59(6):4018-4022.