微波电调滤波器设计

发布时间：2018-03-07 02:01

本文选题：电调　切入点：阶梯阻抗谐振器　出处：《西安电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：现代无线通信系统的发展日益受到频谱资源紧缺等问题的制约,微波滤波器的应用也日趋广泛。多频、扩跳频和动态频率分配等频谱技术的应用,希望射频器件尤其是滤波器能满足快速电调或可重构的需要。因此,设计性能良好的电调或可重构滤波器,对于理论研究和工程应用都具有重要意义。本文主要研究两种新型微波电调滤波器的基本原理与设计方法,一种是微带四通带电调滤波器,另一种是VHF背腔螺旋谐振器电调滤波器,主要工作包括:1.研究整理了电调可重构滤波器的发展背景,并且对电调滤波器的发展现状做出了简要的叙述,表明了研究电调可重构滤波器所具有的重要理论意义和实践意义;2.对滤波器的一些概念、主要类型以及每个类型的特性、低通原型滤波器的设计方法及其变换过程进行了详细分析,并分析了电调方式;3.采用双层阶梯阻抗谐振器(SIR),设计了工作在4.0G/5.1G/7.1G/8.5G的紧凑型四通带滤波器,并通过加载变容管和外部偏置电路,实现其中第三/第四通带的快速连续电调,利用IE3D与ADS软件进行联合仿真研究了调谐机理与调谐范围,并对该滤波器进行加工测试;4.采用短路枝节加载谐振器(SLR),设计了一款工作2.4G/3.5G/4G/5.2G的四通带微带滤波器,引入变容管电调技术后实现了2.4G与4G通带的连续可调;5.基于螺旋腔体滤波器和背腔谐振器,设计了工作在VHF频段两阶螺旋滤波器,背腔谐振器产生带外传输零点可以显著提高带外抑制。在螺旋滤波器左右两端接入PIN开关电容矩阵,通过控制PIN开关导通与截止来调整接入电路的电容值,从而改变滤波器的中心频率。仿真设计了30-88MHz频段内中心频率和带外传输零点同步调节的电调滤波器,为下一步工程应用提供了参考。
[Abstract]:The development of modern wireless communication system is constrained by the shortage of spectrum resources and other issues, the application of microwave filters has become more and more widely. The application of spread spectrum and frequency hopping multi frequency, and dynamic frequency distribution of spectrum technology, hope RF devices especially filter can meet the need of fast tuning or reconfiguration. Therefore, the performance of power transfer or reconfigurable filter, has important significance for theory research and engineering applications. The basic principle and design method of this paper mainly studies two kinds of new microwave tunable filter, a microstrip four electrically tunable filter, the other is a VHF cavity backed spiral resonator tunable filter, the main work includes: 1. study electric adjustable background reconstruction filter, and the development status of the electric tunable filter has made the brief narration, shows the power transfer can have important physical reconstruction filter The theory and practical significance; some concepts of 2. filters, main types and characteristics of each type, a detailed analysis of the design method of prototype lowpass filter and its transformation process, and analyzes the power transfer mode; 3. double stepped impedance resonator (SIR), working in the compact 4.0G/5.1G/7.1G/8.5G four bandpass filter design and, by loading the varactor and external bias circuit, which realizes third / fourth band fast continuous electric adjustment, CO simulation of tuning mechanism and tuning range by using IE3D and ADS software, and process test of the filter; 4. by short circuited stub loaded resonator (SLR), designed a 2.4G/3.5G/4G/5.2G four band microstrip filter, introducing varactor tunable power transfer technology to achieve the 2.4G and 4G band; 5. based on spiral cavity filter and cavity resonator design The work in the VHF band two order spiral resonator filter, back band transmission zeros can significantly improve the band rejection filter. In the spiral around both ends of PIN access switch capacitance matrix, by controlling the PIN switch turn-on and off the capacitor to adjust the access circuit value, thereby changing the center frequency of the filter. The simulation design of a 30-88MHz band in the center frequency and band tunable filter with transmission zeros synchronous regulation, provides the reference for the next step of the engineering application.

【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713

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