【摘要】：隨著無(wú)線通信技術(shù)的不斷發(fā)展與應(yīng)用,電子電氣產(chǎn)品與系統(tǒng)的電磁兼容性問(wèn)題顯得尤為重要。作為電磁兼容測(cè)試系統(tǒng)的重要組成部分—半電波暗室發(fā)揮著不可替代的作用。同時(shí),半電波暗室的性能也受到了越來(lái)越多的關(guān)注,特別是隨著工作在低頻段的電氣電子設(shè)備和系統(tǒng)的數(shù)量不斷增加,半電波暗室的低頻性能對(duì)于準(zhǔn)確評(píng)估其電磁兼容性起到了關(guān)鍵性的作用,因此,對(duì)半電波暗室的低頻性能研究具有重要的意義和廣闊的應(yīng)用前景。本文圍繞半電波暗室的性能指標(biāo)—場(chǎng)均勻性和歸一化場(chǎng)地衰減在低頻段的特性展開(kāi)研究。主要內(nèi)容如下:(1)基于鐵氧體與屏蔽室的特性分析,采用外推擬合的方法,得到了10kHz～30MHz頻段內(nèi)鐵氧體的電磁參數(shù),并理論分析了鐵氧體的吸波特性。以二階色散模型在軟件中進(jìn)行材料參數(shù)的設(shè)置,仿真分析了鐵氧體的反射率,根據(jù)理論、仿真和實(shí)測(cè)對(duì)比了鐵氧體的吸波特性,從側(cè)面驗(yàn)證數(shù)據(jù)的可行性。同時(shí),對(duì)屏蔽暗室的諧振特性進(jìn)行了分析,并通過(guò)仿真分析可知,鐵氧體能夠抑制屏蔽室的諧振,使半電波暗室在低頻段能夠很好的模擬開(kāi)闊場(chǎng)。(2)針對(duì)場(chǎng)均勻性的研究,闡述了實(shí)驗(yàn)原理與方法,根據(jù)場(chǎng)均勻性測(cè)試方法建立了暗室場(chǎng)均勻性的模型,分析對(duì)比了鋪設(shè)鐵氧體前后的暗室的場(chǎng)強(qiáng)分布,運(yùn)用FDTD算法對(duì)暗室的場(chǎng)均勻性進(jìn)行了仿真分析,并與某暗室內(nèi)場(chǎng)均勻性的實(shí)測(cè)值進(jìn)行了對(duì)比分析,結(jié)果表明仿真與實(shí)測(cè)值基本吻合。(3)對(duì)于NSA的研究,根據(jù)實(shí)驗(yàn)原理與方法,采用場(chǎng)地參考法對(duì)NSA運(yùn)用FDTD算法進(jìn)行了仿真分析。同時(shí),進(jìn)行了實(shí)測(cè)對(duì)比,對(duì)比結(jié)果表明,仿真與實(shí)測(cè)是吻合的,誤差是在可接受的范圍內(nèi)。
[Abstract]:With the development and application of wireless communication technology, the electromagnetic compatibility of electronic and electrical products and systems is becoming more and more important. As an important part of electromagnetic compatibility testing system, half-wave anechoic chamber plays an irreplaceable role. At the same time, more and more attention has been paid to the performance of half-wave anechoic cells, especially with the increasing number of electrical and electronic devices and systems working in low frequency band. The low-frequency performance of the half-wave anechoic chamber plays a key role in accurately evaluating its electromagnetic compatibility. Therefore, it is of great significance and broad application prospect to study the low-frequency performance of the half-wave anechoic cell. In this paper, the field uniformity and the characteristic of normalized site attenuation in low frequency band are studied. The main contents are as follows: (1) based on the characteristic analysis of ferrite and shielding chamber, the electromagnetic parameters of ferrite in 10kHz~30MHz band are obtained by extrapolation fitting method, and the wave absorption characteristics of ferrite are analyzed theoretically. The second order dispersion model is used to set the material parameters in the software, and the reflectivity of ferrite is simulated and analyzed. According to the theory, the characteristics of absorbing wave of ferrite are compared with the measured data, and the feasibility of the data is verified from the side. At the same time, the resonant characteristics of the shielded chamber are analyzed, and the simulation results show that the ferrite can suppress the resonance of the shielding chamber, so that the semi-anechoic chamber can well simulate the open field at low frequency. (2) the research on field uniformity. The experiment principle and method are expounded, the model of field uniformity of dark chamber is established according to the test method of field uniformity, the field intensity distribution of dark chamber before and after laying ferrite is analyzed and the field uniformity of dark chamber is simulated by FDTD algorithm. The results show that the simulation results are in good agreement with the measured values. (3) for the study of NSA, according to the experimental principle and method, The field reference method is used to simulate NSA using FDTD algorithm. At the same time, the experimental results show that the simulation is consistent with the actual measurement, and the error is within the acceptable range.
【學(xué)位授予單位】：南京信息工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN03

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 鞠文靜;周忠元;蔣全興;景莘慧;周香;;基于有限積分法的電磁兼容吸波材料反射率的建模仿真[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年03期

2 姜超;;5m法暗室的NSA測(cè)試方法研究[J];中國(guó)制造業(yè)信息化;2009年11期

3 孟東林;沙斐;王國(guó)棟;;近距離觀察電磁兼容暗室的場(chǎng)均勻性——電磁兼容暗室的有限元分析[J];微波學(xué)報(bào);2007年03期

4 楊栓平;程麗麗;;用于電磁兼容測(cè)量的電磁屏蔽半電波暗室[J];火控雷達(dá)技術(shù);2007年01期

5 李瑩瑩;聞?dòng)臣t;;電波暗室的分類(lèi)及半電波暗室的性能評(píng)價(jià)指標(biāo)[J];安全與電磁兼容;2005年S1期

6 趙金奎;;半電波暗室的技術(shù)要求[J];安全與電磁兼容;2005年S1期

7 孟東林;沙斐;王國(guó)棟;陳嵩;肖恒杰;;電波暗室用吸波材料的性能優(yōu)化和選用[J];安全與電磁兼容;2005年S1期

8 肖躍德;;NSA理論值的計(jì)算及其程序?qū)崿F(xiàn)[J];火控雷達(dá)技術(shù);2005年04期

9 王曉寧,周克生;用射線法預(yù)測(cè)電波暗室的性能[J];安全與電磁兼容;2000年04期

10 葛俊祥，，李玉星，印國(guó)泰;大型微波暗室電磁特性的理論分析與設(shè)計(jì)[J];電子學(xué)報(bào);1996年12期

相關(guān)博士學(xué)位論文 前1條

1 孟東林;混響室和電波暗室的低頻性能研究[D];北京交通大學(xué);2008年

相關(guān)碩士學(xué)位論文 前3條

1 俞梁英;3m法半電波暗室性能參數(shù)測(cè)試及輻射騷擾測(cè)試優(yōu)化設(shè)計(jì)研究[D];蘇州大學(xué);2010年

2 李英杰;電波暗室場(chǎng)均勻性測(cè)試的研究[D];北京交通大學(xué);2008年

3 曾立志;吸波材料抑制電磁干擾研究[D];西安電子科技大學(xué);2007年

本文編號(hào)：2403415