文档介绍：东海科学技术学院
毕业论文(设计)
题目:通信系统用带通滤波器设计及其
PSPICE仿真分析
系: 机电系
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通信系统用带通滤波器设计及其PSPICE仿真分析
摘要
带通滤波器在通信系统中的应用极为广泛,由于计算机技术及各类技术的发展,致使滤波器的技术发展也因此上了一个崭新的台阶,并且朝高精度、低功耗、小体积方向发展。滤波器的单片集成在70年代后期被研制出来并得到应用,往后的时间学者们都致力于提高各类新型滤波器性能的研究。时至今日主要致力于把各类滤波器应用到产品的开发和研制。在各类通信系统中,滤波器的应用极为广泛,其优劣直接决定产品质量。因此设计出满足条件且又性能优良的带通滤波器显得尤为迫切。
本论文的主要工作在于研究和设计性能优良的带通滤波器。本论文验证以中心频率为120MHz的带通滤波器为例,介绍了基于贝塞尔函数来进行带通滤波器的设计,在满足要求的同时也在经济性和制造程度上达到优良。论文使用OrCAD公司的PSPICE软件对所设计的带通滤波器进行仿真研究,结果显示该带通滤波器通带起伏小,阻带衰减大,在群延迟特性图中可看出,在通带内延迟基本比较稳定,且表现出最稳定的群延迟特性。文中还分别介绍了滤波器综合设计法的基本知识,包括工作参数、归一化数值等。
关键词:带通滤波器;仿真;频率;PSPICE
Abstract
Band-pass filter in munications system is very extensive, computer technology and the development of various techniques, filter technology development so that a new step and high-precision, low-power, small-footprint direction. Filter monolithic in the late 1970s were developed and widely over the time scholars are working to improve the various properties of the new filter. Today primarily devoted to the various types of filters applied to the product's development and research. Among the various types munication systems, the filter application is very extensive, its merits directly determines the quality of products. Therefore designed to satisfy the condition and performance of the band-pass filter it is urgent.
This major work is to study and design of band-pass filter. This thesis validation to center frequency to 120MHz of band-pass filter, for example, describes based on Bessel functions for band-pass filter design, meet the requirements, but also in economic and manufacturing extent achieve excellence. Thesis using PSPICE pany's software on the design of band-pass filter for simulation, results show the bandpass filter passband litlle, stopband decay, in the Group delay characteristics can be seen in the figure, the band delay basic relatively stable, and showed the most stable group delay characteristics. The article also describes the filter integrated