互补开口谐振环在微波器件中的应用

发布时间：2018-05-24 15:07

本文选题：微带天线 + CSRR　；参考：《山东科技大学》2017年硕士论文

【摘要】：左手材料由于同时具有负介电常数和负磁导率而表现出奇异的电磁特性,自从被人工合成研制成功后,左手材料成为物理与电磁学界的主要研究对象。左手材料的主要实现形式有:开口谐振环(Split Ring Resonator,SRR)、互补开口谐振环(Complementary Split Ring Resonator, CSRR)。基于它们的平面结构,单元尺寸小,易于通过微带技术实现等优点,SRR和CSRR受到广泛的关注,并应用于天线及滤波器等微波器件中。现在,微型化的微波器件成为不懈的追求。由于互补开口谐振环结构更加容易制造,因此,其在实际应用中更受追捧。基于CSRR结构的电磁性能,本文主要研究微带天线阵间的互耦,并在天线阵中加载CSRR来抑制耦合。此外,通过该结构设计了一款低通滤波器,取得了小型化、高性能的效果。本文的主要工作包括:(1)阐述了左手材料的基础知识,并介绍了 CSRR的基本结构组成,详细分析了该结构的电磁性能,介绍了 FEM和MOM两种数值分析方法,并结合Matlab编程验证了其可行性、实用性。(2)首先设计了一个7.55GHz的微带贴片天线阵,简单介绍了微带天线阵之间的相互耦合形成过程。然后,利用CSRR结构与缺陷地结构相结合,加载到微带贴片天线阵间。通过改变天线阵接地板上的电场分布,实现了抑制天线阵互耦效应的效果。在谐振中心频率处,S12可达-47.6dB,取得了很好的抑制效果。该结构加工方便,而且不影响介质板大小,有益于天线的小型化。(3)简单介绍了滤波器的基础性能后,根据CSRRDGS结构,设计了一款低通滤波器。设计并分析了 CSRRDGS结构和等效电路,基于HFSS软件仿真了不同参数对该结构的影响。将对称性的开路枝节,加载到微带线两端。CSRRDGS结构的阻带带宽,得到了一定程度的拓展。在此基础上,设计了级联不同CSRRDGS个数的低通滤波器,并取得了良好的效果。
[Abstract]:Left-handed materials exhibit singular electromagnetic properties due to their negative permittivity and negative permeability. Since they were synthesized and developed, left-handed materials have become the main research objects in physics and electromagnetics. The main realization forms of Left-handed materials are as follows: split Ring resonator and complementary Split Ring Resonator, Split Ring Resonator,. Because of their planar structure, small unit size and easy to be realized by microstrip technology, SRR and CSRR have attracted wide attention, and have been applied to microwave devices such as antennas and filters. Now, miniaturized microwave devices have become the unremitting pursuit. Because the structure of complementary open resonant ring is easier to manufacture, it is more popular in practical application. Based on the electromagnetic performance of CSRR structure, the mutual coupling between microstrip antenna arrays is studied in this paper, and CSRR is loaded into the antenna array to suppress the coupling. In addition, a low-pass filter is designed through this structure, which achieves miniaturization and high performance. In this paper, the basic knowledge of left-handed materials is introduced, the basic structure of CSRR is introduced, the electromagnetic properties of the structure are analyzed in detail, and two numerical analysis methods, FEM and MOM, are introduced. A microstrip antenna array of 7.55GHz is designed, and the mutual coupling process between microstrip antenna array is briefly introduced. Then, the CSRR structure is combined with the defective ground structure and loaded into the microstrip patch antenna array. By changing the distribution of electric field on the floor of antenna array, the effect of restraining the coupling effect of antenna array is realized. At the resonant center frequency, the S12 can reach -47.6dB, and the inhibition effect is very good. The structure is easy to process and does not affect the size of the dielectric plate. It is beneficial to the miniaturization of the antenna. After introducing the basic performance of the filter, a low-pass filter is designed according to the CSRRDGS structure. The CSRRDGS structure and equivalent circuit are designed and analyzed. The influence of different parameters on the structure is simulated based on HFSS software. The symmetrical open-circuit section is loaded into the stopband bandwidth of the CSRRDGS structure at both ends of the microstrip line, which is extended to a certain extent. On this basis, the low pass filter with different number of cascaded CSRRDGS is designed, and good results are obtained.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822;TN713

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