基于左手传输线滤波器研究

发布时间：2018-01-09 01:08

本文关键词：基于左手传输线滤波器研究　出处：《天津大学》2016年博士论文　论文类型：学位论文

【摘要】：左手材料由于其独特的电磁特性,近些年已经成为电磁领域热门的研究课题之一。然而,目前对于左手传输线的研究还处于探索阶段,还有很多理论与实践的工作需要补充。本文在对CMOS传输线波导特性进行详细分析的基础上,设计并制作了基于双重行为(Dual-Behavior)谐振器的带通滤波器与右手梳状滤波器,基于左手传输线的双通带滤波器、梳状滤波器与双模滤波器。首先,通过对CMOS工艺中的传统微带传输线与人工合成的互补传导传输线的波导特性的萃取,论证了运用CMOS工艺制作太赫兹滤波器的可行性,并设计制作了基于双重行为谐振器的带通滤波器与右手梳状滤波器。其次,本文提出了一种新型的双通带谐振器,以及基于该谐振器的双通带滤波器。该双通带谐振器由开路的左手传输线与开路右手传输线并联构成,在此谐振器中,开路右手传输线在其四分之波长频率处引入一个传输零点;左手传输线在其电角度小于π/4时,与右手传输线形成并联谐振,引入传输极点;在其电角度为π/4与π/2时分别等效为串联谐振和并联谐振,引入传输零点与传输极点;左手传输线自身的高通波导特性,可以滤除不需要的低频信号。此外,左手传输线具有较大的慢波系数,这极大地缩小了谐振器的尺寸。再次,本文提出了基于左手传输线的梳状滤波器架构。与传统的基于右手传输线的梳状滤波器相比,左手梳状滤波器的谐振器中的左手传输线一侧加载接地电容,而另一侧开路。通过对加载负载电容的左手谐振器的谐振特性、左手谐振器之间的耦合特性、以及左手梳状滤波器的输入/输出耦合结构的系统分析,详细阐述了左手梳状滤波器的设计方法。同时,由于左手传输线的独特波导特性,左手梳状滤波器的寄生通带位于其主通带的低频侧。最后,本文提出了基于左手传输线的双模滤波器架构。该左手双模滤波器工作于负阶谐振模式。左手环形谐振器的谐振频率可以由左手传输线的波导特性、左手传输线单元结构的周期、以及谐振器中所包含的单元结构的数目计算得到。左手环形谐振器的双模特性可以通过调节微扰电容大小、微扰电感长度与插入右手传输线来激发。本文还对左手环形谐振器的电流分布进行了研究。在进行滤波器设计时,为了获得较大的耦合系数,本文将三种微扰方式有机的结合在一起,制作出了具有传统右手双模滤波器很难实现的带宽的双模滤波器。
[Abstract]:The left hand material because of its unique electromagnetic properties, in recent years has become one of the hot topics in electromagnetic fields. However, current studies on the left-handed transmission line is still in the exploratory stage, there are many theoretical and practical work needs to be added. This paper detailed analysis of CMOS waveguide transmission line characteristic, designed and fabricated based on double act (Dual-Behavior) band-pass filter and comb filter resonators of the right hand, left hand transmission line Dual Band Bandpass Filter Based on comb filter with dual mode filter. Firstly, extraction by traditional waveguide microstrip transmission line of CMOS technology and synthesis of the complementary transmission transmission line, demonstrates the feasibility of making use of terahertz filter CMOS process, making the band-pass filter and the right hand comb filter design based on dual behavior resonator. And secondly, this paper. A new type of dual band resonator, the resonator and the double pass band filter. Based on the dual band resonator composed of left-handed transmission lines open and open the right hand transmission line connected in parallel, the resonator, open the right hand transmission line at a wavelength of four frequency into a transmission zero; left-handed transmission line the electrical angle is less than /4, the formation of resonance with a right-handed transmission line is introduced in the power transmission pole; angle /4 and Pi Pi /2 were equivalent to the series and parallel resonant, introducing the transmission zeros and poles; high pass waveguide characteristics of left-handed transmission line itself, can filter the low frequency signal. In addition, the left hand transmission line with slow wave coefficient, which greatly reduces the dimensions of the resonator. Thirdly, proposed a comb filter architecture based on left-handed transmission line. With the traditional right-handed transmission line based on the The left hand side comb filter compared to transmission line loading left comb filter resonators in the grounded capacitor, and the other side of the open circuit. Through the resonant characteristics of the resonator loaded the capacitance of the left hand, left hand coupling between the resonators, and the analysis of the system left comb filter input / output coupling structure, elaborates the design method of the left hand comb filter. At the same time, due to the unique optical properties of left-handed transmission line, parasitic left comb filter pass band is located in the main through low frequency side band. Finally, the proposed dual-mode filter architecture based on left-handed transmission line. The left hand dual-mode filters work in a negative order resonant modes. Waveguide resonant frequency of left ring resonator the left-handed transmission line cycle, left-handed transmission line unit structure, and the number of elements contained in the resonator structure calculation Get a dual-mode ring resonator. Left-handed properties can be adjusted by the perturbation capacitance, inductance and micro disturbance insert right-handed transmission line length to inspire. The left hand ring resonator is studied. The current distribution in the filter design, in order to obtain a large coupling coefficient, the three perturbation mode combination together, making a dual-mode filter is difficult to achieve with traditional right dual-mode filter bandwidth.

【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TN713

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