微带天线单元及阵列的隐身技术研究

发布时间：2018-02-25 08:05

本文关键词： 人工磁导体(AMC) 部分反射与吸收表面(PRAS) 雷达散射截面积(RCS) 增益提高小型化微带天线　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：在电子战与信息战飞速发展的今天,以缩小目标雷达散射截面积(RCS)、缩短探测距离为目的,提高我方军事目标战斗力和生存能力的的低散射天线技术(俗称"隐身"技术),已成为天线领域的重要课题。本文结合该领域研究热点,分析了圆极化、可重构、低仰角等情况对天线隐身技术的性能要求。针对目前公开发表的研究成果中所存在的局限性,开展低散射高性能天线技术的研究工作。本文的创新点可以概括如下:1.提出部分反射吸波表面(PRAS)结构,验证其在微带天线单元及阵列上的有效性:首次提出新型的可同时实现天线带内带外隐身的PRAS结构,分析其工作原理,给出等效电路模型;将其应用于C波段的微带天线单元,可在5-13 GHz的频率范围内实现带内25 dB、带外15 dB的RCS缩减,并有效提高天线增益达4.5 dB;对PRAS结构做出修正,将PRAS结构分别应用于2×2线极化微带天线阵列和2×2圆极化微带天线阵列。仿真结果表明,将PRAS结构应用于天线阵列时,在保证天线阵正常工作的前提下,天线带内和带外的RCS缩减效果依然显著。经实物测试,证实了PRAS结构在天线带内外隐身和提高天线增益方面的良好性能。相关研究成果正在被IEEE Antenna and Wireless Propagation Letters期刊审核,已推荐出版。2.极化独立人工磁导体(AMC)结构的小型化研究及其在微带高性能天线中的应用:与参考单元相比,小型化的单元尺寸缩减可达50%,对应电尺寸为0.09λ0×0.09λ0;对小型化的AMC单元进行棋盘式配置应用于微带天线,可在有效缩减天线带内带外RCS的同时实现天线增益的提高。这部分工作已被2016年International Symposium on Antenna and Propagation收录。
[Abstract]:With the rapid development of electronic warfare and information warfare, the aim is to reduce the radar cross section area of the target and shorten the detection range. The low scattering antenna technology (commonly known as "stealth" technique), which improves the combat effectiveness and survivability of our military targets, has become an important subject in the field of antenna. The performance requirements of antenna stealth technology in cases such as low elevation angle. The innovation of this paper can be summarized as follows: 1. A partial reflection absorbing surface (PRASS) structure is proposed. To verify its effectiveness in microstrip antenna elements and arrays, a new PRAS structure, which can simultaneously realize the in-band and out-of-band stealth of the antenna, is proposed for the first time, and its working principle is analyzed, the equivalent circuit model is given, and applied to the C-band microstrip antenna unit. In the frequency range of 5-13 GHz, the RCS can be reduced by 25 dB in band and 15 dB out of band, and the gain of antenna can be increased to 4.5 dB. The structure of PRAS is modified. The PRAS structure is applied to 2 脳 2 linear polarized microstrip antenna array and 2 脳 2 circular polarized microstrip antenna array respectively. The simulation results show that when the PRAS structure is applied to the antenna array, it can ensure the normal operation of the antenna array. The results of in-band and out-of-band RCS reduction are still significant. Physical tests show that the PRAS structure has good performance in stealth and gain improvement. Related research results are being reviewed by IEEE Antenna and Wireless Propagation Letters journals. Recommended publication .2. miniaturization of polarization-independent artificial magnetic conductor (AMCC) structures and their applications in microstrip high-performance antennas: compared with reference cells, The miniaturized unit size can be reduced to 50 and the corresponding electrical size is 0.09 位 0 脳 0.09 位 0.The chessboard configuration of the miniaturized AMC unit is applied to the microstrip antenna, The antenna gain can be improved while effectively reducing the RCS in and out of the band. This part of the work has been included in the International Symposium on Antenna and Propagation in 2016.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822

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