【摘要】：近些年來,超材料(Metamaterials)由于具有特殊的電磁特性在應用電磁學、固體物理學以及材料科學等方向受到越來越多的關注,已經(jīng)成為當下研究的熱點之一。所謂超材料是一些人工材料的總稱,能實現(xiàn)自然界中一般材料所不具備的且具有實用價值的電磁特性。人工磁導體(Artificial magnetic conductors,AMC)就是一種典型的超材料,其在反射帶隙內(nèi)具有理想磁表面的性質(zhì),基于此特性在制作低剖面天線以及改善天線輻射性能方面有著巨大優(yōu)勢和應用前景,因此研究AMC結構有著極高價值。 半波振子天線由于全向輻射導致定向增益較低,不利于實際應用。為改善其缺點,需要在天線一側加載反射面提高定向增益,為此本文以AMC結構應用于半波振子天線為背景,做了深入的探討和研究。 本文首先給出了AMC結構的反射帶隙形成機理,對影響反射帶隙的重要參數(shù)進行了詳細分析并得出相關結論。 其次設計了特定反射頻率的AMC結構并應用于偶極子天線,在這其中為探尋AMC最優(yōu)結構即天線定向增益達到最大,本文分別探討了AMC結構貼片元素正方形排列、矩形排列以及接地板對定向增益的影響,并在此基礎上提出了兩種新型元素排列方式。最優(yōu)AMC結構與加載理想電表面偶極子天線相比較,天線不僅實現(xiàn)了低剖面的實際應用需求,而且天線的定向增益提高了3.6dB。 最后為獲得更高增益天線,本文將最優(yōu)AMC結構應用于天線陣中。主要從兩方面進行了研究：(1)分析了平行與共軸振子二元陣加載AMC結構與理想電表面的帶寬以及定向增益的大小,從結果看加載前者的效果明顯優(yōu)于后者；(2)在相同的AMC結構上通過改變四元陣中天線單元的排列方式,尋求天線定向增益最大的排列方式。
[Abstract]:In recent years, the metamaterials have become one of the hot spots of the present study because of the special electromagnetic characteristics in the application of electromagnetics, solid physics and material science. The so-called metamaterial is a general term of some artificial materials, and can realize the electromagnetic characteristics that are not provided by the general materials in the natural world and have practical value. the artificial magnetic conductor (amc) is a typical supermaterial which has the property of the ideal magnetic surface in the reflected band gap, and has great advantages and application prospect in making the low-profile antenna and improving the radiation performance of the antenna based on the characteristic, So it is very valuable to study the AMC structure. The half-wave oscillator antenna is low in directional gain due to the omnidirectional radiation and is not beneficial to the actual In order to improve its disadvantages, it is necessary to load the reflecting surface on one side of the antenna to improve the directional gain. In this paper, the mechanism of the reflection band gap formation of the AMC structure is given, and the important parameters affecting the reflected band gap are analyzed in detail and the phase is obtained. In this paper, the AMC structure of the specific reflection frequency is designed and applied to the dipole antenna, in which, in order to find the optimal structure of the AMC, that is, the directional gain of the antenna reaches the maximum, the square arrangement, the rectangular arrangement of the patch elements of the AMC structure and the orientation of the ground plate are discussed in this paper. In this paper, two new types of elements are put forward based on the influence of gain the optimal amc structure is compared with the dipole antenna which is loaded with the ideal electric surface, the antenna not only realizes the practical application requirement of the low profile, but also the directional gain of the antenna is improved, 3.6dB. Finally, in order to get a higher gain antenna, the optimal AMC structure is presented in this paper It is applied in the antenna array. The main results are as follows: (1) The bandwidth of the loading AMC structure and the ideal electric surface of the parallel and coaxial vibrator binary array and the size of the directional gain are analyzed, and the effect of loading the former from the result is analyzed. and (2) searching for antenna directional gain by changing the arrangement mode of the antenna elements in the quaternary array on the same AMC structure,
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN823.27

【參考文獻】

相關期刊論文 前1條

1 閆敦豹;高強;付云起;張國華;袁乃昌;;改進的寬帶人工磁導體結構[J];電波科學學報;2005年05期

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本文編號：2445281