树枝状结构超材料在微带天线上的应用仿真

树枝状结构超材料在微带天线上的应用仿真

内容简介：针对普通微带天线增益低、方向性差的缺点,提出一种树枝状结构超材料微带天线模型,为提高性能,利用以有限积分为主的CST软件对树枝状结构负磁导率微带天线模型和树枝状结构左手材料覆层微带天线模型进行了仿真研究.仿真结果表明,相对于普通微带天线,负磁导率材料基板天线增益提高了,并使有效辐射功率得到提高.同时,树枝状结构左手材料覆层天线的增益提高了1.2dB,相当于天线的有效辐射功率提高了31.8%,E面和H面丰瓣半功率波束宽度分别收缩了45.8°和44.8°.树枝状结构负磁导率材料和左手材料可以抑制天线激发的表面波,对天线发射的电磁波进行会聚效率更高.新型天线可用于导弹、卫星及飞机飞行器等.

Abstract：To tackle the disadvantage of the mierostrip antenna,such as low gainand bad directivity,the novel dendritic structure micristrip antenna was designed.The performances of the dendritic structure negative permeability mierostirp antenna and the dendritic LHMs cover microstrip antenna were optimized and simulated using CST software.The result shows that compared to the conventional microstrip antenna,the gain of the antenna based on the negative permeability metamaterial substrate was increased by 2.7dB,that means its efficiency was increased by 86.2%,and the 3-dB beam width of E-plane can be reduced by 24.6°while the 3-dB beam width of H-plane can be reduced by 36.1 °.On the other hand,the gain of the antenna based on the LHMs cover was increased by 1.2dB,that means its efficiency Was increased by 31.8%,and the 3-dB beam width of E-plane can be reduced by 45.8°while the 3-dB beam width of H-plane can be reduced by 44.8°.We can draw the conclusion that dendrific strcture negative permeability metamaterials and the dendritic structure LHMs can restrain the surface wave of the antenna and converge the electromagnetism wave beam respectively.The new-style microstrip antenna can be used on missile,secondary planet and aeroplane.

作者：纪宁, 赵晓鹏,

关键词：树枝状结构, 负磁导率材料, 左手材料, 微带天线, 方向图,