本文關(guān)鍵詞： 人工磁導(dǎo)體(AMC) 部分反射與吸收表面(PRAS) 雷達(dá)散射截面積(RCS) 增益提高 小型化 微帶天線　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在電子戰(zhàn)與信息戰(zhàn)飛速發(fā)展的今天,以縮小目標(biāo)雷達(dá)散射截面積(RCS)、縮短探測距離為目的,提高我方軍事目標(biāo)戰(zhàn)斗力和生存能力的的低散射天線技術(shù)(俗稱"隱身"技術(shù)),已成為天線領(lǐng)域的重要課題。本文結(jié)合該領(lǐng)域研究熱點(diǎn),分析了圓極化、可重構(gòu)、低仰角等情況對(duì)天線隱身技術(shù)的性能要求。針對(duì)目前公開發(fā)表的研究成果中所存在的局限性,開展低散射高性能天線技術(shù)的研究工作。本文的創(chuàng)新點(diǎn)可以概括如下:1.提出部分反射吸波表面(PRAS)結(jié)構(gòu),驗(yàn)證其在微帶天線單元及陣列上的有效性:首次提出新型的可同時(shí)實(shí)現(xiàn)天線帶內(nèi)帶外隱身的PRAS結(jié)構(gòu),分析其工作原理,給出等效電路模型;將其應(yīng)用于C波段的微帶天線單元,可在5-13 GHz的頻率范圍內(nèi)實(shí)現(xiàn)帶內(nèi)25 dB、帶外15 dB的RCS縮減,并有效提高天線增益達(dá)4.5 dB;對(duì)PRAS結(jié)構(gòu)做出修正,將PRAS結(jié)構(gòu)分別應(yīng)用于2×2線極化微帶天線陣列和2×2圓極化微帶天線陣列。仿真結(jié)果表明,將PRAS結(jié)構(gòu)應(yīng)用于天線陣列時(shí),在保證天線陣正常工作的前提下,天線帶內(nèi)和帶外的RCS縮減效果依然顯著。經(jīng)實(shí)物測試,證實(shí)了PRAS結(jié)構(gòu)在天線帶內(nèi)外隱身和提高天線增益方面的良好性能。相關(guān)研究成果正在被IEEE Antenna and Wireless Propagation Letters期刊審核,已推薦出版。2.極化獨(dú)立人工磁導(dǎo)體(AMC)結(jié)構(gòu)的小型化研究及其在微帶高性能天線中的應(yīng)用:與參考單元相比,小型化的單元尺寸縮減可達(dá)50%,對(duì)應(yīng)電尺寸為0.09λ0×0.09λ0;對(duì)小型化的AMC單元進(jìn)行棋盤式配置應(yīng)用于微帶天線,可在有效縮減天線帶內(nèi)帶外RCS的同時(shí)實(shí)現(xiàn)天線增益的提高。這部分工作已被2016年International Symposium on Antenna and Propagation收錄。
[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.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN822

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