左右手传输线在无源器件中的应用

发布时间：2018-01-26 23:42

本文关键词： 无源器件多通带滤波器复合左右手传输线缺陷地结构多模式谐振　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：为了提高通信效率,减小设备体积,节约加工成本,现代通信技术对多频带工作提出了更高的要求。多频带滤波器是现代通信系统中的关键部件,因此,本文对多频带滤波器的研究是具有实际意义的。本文针对采用复合左右手传输线和缺陷地这两种结构的滤波器进行了研究,取得了一定的成果,主要的研究工作和创新点如下:1.提出了采用横向并联结构和T型复合左右手谐振器结构相结合的滤波器,利用其零阶和正1阶两点的谐振模式产生传输极点,减小插损,同时抑制负阶模式,增强了带外抑制,研制出了一支三通带和一支四通带滤波器。采用复合左右手材料制成的滤波器具有负折射率,平面透镜成像,反多普勒效应,反切伦科夫辐射,负光压等等优点,受到了许多国内外学者的研究。复合左右手传输线在复合左右手材料的基础上发展而来,具有负阶,零阶和正阶这三种谐振模式,能够很好的应用于多通带滤波器的设计中。2.提出了采用三角蘑菇型复合左右手谐振器结构和S型非对称缺陷地结构相结合的滤波器,进一步增强带外抑制,研制出了一支双通带滤波器。提出了采用交指电容蘑菇混合型复合左右手谐振器和开口谐振环型缺陷地结构相结合的滤波器,利用其正1阶谐振频率,抑制相邻的0阶和正2阶谐振模式,减小了带内插损,研制出了一支单通带滤波器。采用缺陷地结构的滤波器能够产生电磁带隙,具有带外抑制好,电路体积小,便于集成等优点。这种结构基于光子晶体的工作原理,在微带电路板底片上刻蚀周期或非周期的图案,改变微带线的分布电容和电感,使得特定频率的电磁波在传播过程中相消,形成传播禁带,能够提高滤波器通带与通带之间的隔离度。上述两种滤波器经过实测,达到了预期指标,验证了理论分析的正确性,完成了研究任务。
[Abstract]:In order to improve communication efficiency, reduce the volume of equipment and save processing cost, modern communication technology put forward higher requirements for multi-band operation. Multi-band filter is a key component in modern communication system. In this paper, the study of multi-band filter is of practical significance. In this paper, two kinds of filters with composite left-hand transmission line and defective ground are studied, and some achievements have been made. The main research work and innovation are as follows: 1. A filter combining the transverse parallel structure and the T-type composite left-right resonator structure is proposed. The resonant modes of zero order and positive first order are used to generate transmission poles, to reduce the insertion loss, and to suppress the negative order mode, so that the out-of-band suppression is enhanced. A three-way band filter and a four-pass band filter are developed. The filter made of composite left-hand material has negative refractive index, plane lens imaging, anti-Doppler effect and anti-Cherenkov radiation. The advantages of negative photovoltage have been studied by many scholars at home and abroad. The compound left-right hand transmission line is developed on the basis of the composite left-hand material, which has three resonant modes: negative order, zero order and positive order. It can be well used in the design of multi-pass band filter. A new filter combining triangular mushroom compound left-right resonator structure and S-type asymmetric defect ground structure is proposed to further enhance out-of-band suppression. A double pass band filter is developed. A hybrid left and right hand resonator with interDigital capacitance is proposed, which is combined with an open resonant ring defect ground structure, and its positive first order resonant frequency is used. A single pass band filter is developed by suppressing the adjacent 0 and 2 order resonant modes and reducing the band insertion loss. The filter with defective ground structure can produce electromagnetic band gap and has good suppression out of band. The structure is based on the principle of photonic crystal and etched periodic or aperiodic patterns on the microstrip circuit board to change the distribution capacitance and inductance of the microstrip line. The special frequency electromagnetic wave is eliminated in the process of propagation, and the propagation band gap can be formed, which can improve the isolation between the pass band and the pass band of the filter. The two kinds of filters have been measured and the expected targets have been achieved. The correctness of the theoretical analysis is verified and the research task is completed.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN811;TN713

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