低阻抗槽线技术及其应用

发布时间：2018-08-20 11:30

【摘要】：槽线是由位于介质基片一侧的接地导体面上的一条细缝构成,另一侧没有金属导体,是一种平面结构传输线。随着微波集成电路的发展,槽线传输线可能越来越受到欢迎。然而,传统槽线的特性阻抗一般较高,制约了槽线的很多用途。考虑到槽线的这一弊端,本文采用了金属化过孔和贴片加载技术,提出了一种低特性阻抗的槽线传输线,该传输线的特性阻抗相比于传统槽线会大大降低,并且特性阻抗可以在较大范围内变化。论文的主要工作包括:1)提出了一种金属化过孔和贴片加载的槽线传输线,该传输线是在槽缝两侧蚀刻两排周期性金属化过孔,金属化过孔阵列等效为金属壁,并且在介质基板另一侧对称地加载两个金属贴片,从而进一步降低槽线的特性阻抗;分析了该新型低阻抗槽线的特性阻抗和传播常数的定义;利用电磁仿真软件HFSS计算了这种新型低阻抗槽线的特性阻抗、传播常数;研究了其传输特性。2)提出了一种金属化过孔和贴片加载的缝隙天线结构。该天线采用阶跃阻抗谐振器(SIR)原理,实现天线的小型化。设计出两种不同厚度的小型化阶跃阻抗缝隙天线,并且比较了这两种缝隙天线的性能。3)设计了一种双频带阶跃阻抗缝隙天线,这种缝隙天线同时具有磁流缝隙和电流贴片的辐射,第一频带为缝隙的辐射,第二频带为贴片的辐射,而且具有小型化的特点,有很强的应用价值。
[Abstract]:The slot line is composed of a thin slot on the ground conductor surface on one side of the dielectric substrate and no metal conductor on the other side. It is a plane structure transmission line. With the development of microwave integrated circuits, slot transmission lines may become more and more popular. However, the characteristic impedance of the traditional slot line is generally high, which restricts many applications of the slot line. Considering the drawback of slot line, this paper uses metallization through hole and patch loading technology, and puts forward a kind of low characteristic impedance slot line transmission line. The characteristic impedance of this transmission line is much lower than that of traditional slot line. And the characteristic impedance can vary in a wide range. The main work of this paper includes: (1) A kind of metallized and patch loaded slotted transmission line is proposed. The transmission line is etched on both sides of the slot with two rows of periodically metallized overholes, and the metallized perforated array is equivalent to the metal wall. Two metal patches are loaded symmetrically on the other side of the dielectric substrate to further reduce the characteristic impedance of the slot line, and the definitions of the characteristic impedance and propagation constant of the new low impedance slot line are analyzed. The electromagnetic simulation software HFSS is used to calculate the characteristic impedance and propagation constant of this new type of low impedance slot line. The antenna is miniaturized by the step impedance resonator (SIR) principle. Two miniaturized step impedance slot antennas with different thickness are designed, and the performance of these two slot antennas is compared. 3) A dual-band step impedance slot antenna is designed. This kind of slot antenna has the radiation of magnetic current slot and current patch, the first frequency band is slot radiation, the second band is patch radiation, and it has the characteristics of miniaturization, so it has strong application value.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN811

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