本文選題：復(fù)合吸波結(jié)構(gòu)　切入點(diǎn)：頻率選擇表面　出處：《北京工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文主要對(duì)多層FSS(Frequency Selective Surface,FSS)復(fù)合吸波結(jié)構(gòu)的分析計(jì)算及優(yōu)化方法進(jìn)行了研究。從探究電磁波在復(fù)合吸波結(jié)構(gòu)中的傳播機(jī)理出發(fā),研究復(fù)合吸波結(jié)構(gòu)反射系數(shù)的廣義散射矩陣級(jí)聯(lián)快速求解法,根據(jù)各個(gè)因素對(duì)多層FSS復(fù)合吸波結(jié)構(gòu)頻響特性的影響規(guī)律,利用優(yōu)化算法設(shè)計(jì)具有低反射系數(shù)、寬吸收頻帶、較薄厚度的多層FSS復(fù)合吸波結(jié)構(gòu)。論文首先將多層FSS復(fù)合吸波結(jié)構(gòu)分解為多個(gè)獨(dú)立的子系統(tǒng),分別研究電磁波在子系統(tǒng)內(nèi)部、介質(zhì)內(nèi)部的傳輸機(jī)理以及子系統(tǒng)界面處的邊界條件�；谟邢拊ê蛷V義散射矩陣級(jí)聯(lián)的理論基礎(chǔ),推導(dǎo)得到多層FSS復(fù)合吸波結(jié)構(gòu)反射系數(shù)的廣義散射矩陣級(jí)聯(lián)快速求解法的計(jì)算公式。進(jìn)一步利用此方法對(duì)多層FSS復(fù)合吸波結(jié)構(gòu)的具體實(shí)例進(jìn)行分析計(jì)算,通過對(duì)比全三維數(shù)值法的計(jì)算結(jié)果,驗(yàn)證了廣義散射矩陣級(jí)聯(lián)快速求解法的正確性。在以上研究的基礎(chǔ)上,論文研究了FSS分別為Y形、十字形和耶路撒冷形時(shí),各個(gè)影響參數(shù)對(duì)復(fù)合吸波結(jié)構(gòu)吸收性能的影響規(guī)律。首先設(shè)計(jì)一種十字形FSS結(jié)構(gòu)單元,疊加到兩層吸波材料中組成復(fù)合吸波結(jié)構(gòu),通過分析復(fù)合吸波結(jié)構(gòu)的頻響特性,驗(yàn)證了FSS可以明顯拓寬復(fù)合結(jié)構(gòu)的吸波帶寬、增強(qiáng)吸收性能。進(jìn)一步研究介質(zhì)厚度、FSS尺寸、不同極化方式下入射角度等參數(shù)對(duì)復(fù)合結(jié)構(gòu)吸收性能的影響。為了得到吸收性能比較理想的復(fù)合吸波結(jié)構(gòu),基于各個(gè)影響參數(shù)對(duì)多層FSS復(fù)合吸波結(jié)構(gòu)反射系數(shù)的影響規(guī)律,合理設(shè)置各個(gè)參數(shù)的邊界值,利用差分進(jìn)化算法對(duì)兩層FSS復(fù)合吸波結(jié)構(gòu)的各個(gè)參數(shù)進(jìn)行優(yōu)化設(shè)計(jì),得到了在工作頻段范圍內(nèi),吸收性能良好的復(fù)合吸波結(jié)構(gòu)。
[Abstract]:This paper focuses on the multi FSS (Frequency Selective Surface, FSS) composite absorption calculation and optimization method are analyzed. From the research on the electromagnetic wave structure of wave absorbing composite wave propagation mechanism in structure, study the generalized scattering matrix composite absorbing reflection structure coefficient with fast solution method, according to the influence of various factors on the multilayer FSS composite microwave frequency response characteristics of wave structure, using optimization algorithm with low reflection coefficient, wide absorption band, multilayer FSS composite wave absorbing structure with thin thickness. Firstly, the multilayer FSS composite absorbing structure is divided into several independent subsystems respectively on the electromagnetic wave in the subsystems, and sub the system boundary conditions at the interface transmission mechanism inside the medium. The theoretical basis of finite element method and the generalized scattering matrix is deduced based on cascaded, multilayer FSS composite absorption coefficient generalized reflection structure The calculation formula of the scattering matrix of the cascade fast solution method. Further by using the method of multilayer FSS composite absorbing concrete example wave structure analyzed by calculation results of numerical method, verified the correctness of the generalized scattering matrix cascading fast solution method. In the research on the basis of the research of FSS respectively. Y shaped cross and Jerusalem, the impact of various parameters on composite absorbing structure absorption capability are analyzed. The first design of a cruciform structure units of FSS, added to the composite wave absorbing structure of two layer absorbing materials, through the analysis of the frequency response characteristics of wave absorbing composite structure, FSS can be verified obviously broaden the absorbing bandwidth of composite structure, enhanced absorption performance. Further study of medium thickness, the size of FSS, the influence of different polarizations of incident angle and other parameters on the absorption properties of composite structures in order to get. The absorption properties of composite absorbing structure is ideal, the impact of various parameters affecting the regularity of multilayer FSS absorbing composite structure based on reflection coefficient, a reasonable set of parameters of the boundary value, using the differential evolution algorithm of two layer FSS composite absorption parameters of wave structure optimization design, has been working in the frequency range. Absorption of composite absorbing structure with good performance.

【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB34

【共引文獻(xiàn)】

相關(guān)期刊論文 前2條

1 呂冬翔;劉立國(guó);丁國(guó)文;;新型FSS縫隙陣列結(jié)構(gòu)的分析與仿真設(shè)計(jì)[J];電子元件與材料;2011年11期

2 陳曉輝;張海巖;;頻率選擇表面的研究與應(yīng)用現(xiàn)狀[J];材料導(dǎo)報(bào);2013年19期

相關(guān)碩士學(xué)位論文 前2條

1 李松坡;基于超材料的頻率選擇表面的研究[D];華東師范大學(xué);2010年

2 呂冬翔;帶通FSS在天線系統(tǒng)中應(yīng)用的仿真設(shè)計(jì)[D];山東大學(xué);2012年

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本文編號(hào)：1643852