基于SIR的同轴腔体带通滤波器设计  

Coaxial cavity bandpass filter design based on SIR

作　　者：冯东旭[1] 夏哲雷[1] 凌访华[1] 

机构地区：[1]中国计量学院信息工程学院,浙江杭州310018

出　　处：《中国计量学院学报》2011年第2期149-153,共5页Journal of China Jiliang University

基　　金：浙江省科技厅重大科技(优先主题)专项(No.2008C01051-1)

摘　　要：基于阶跃阻抗谐振器SIR(stepped impedance resonators)的基本原理,采用λg/4型SIR作为基本谐振单元,设计了一款小型化同轴腔体带通滤波器.仿真结果显示,相比实际长度λg/4该滤波器尺寸压缩了56.7%,通带内回波损耗小于-17.5 dB,插入损耗小于0.1 dB,带外抑制度达到了-38.8 dB,满足了现代通信系统对滤波器小型化、低插入损耗、高选择性的要求,能够广泛应用于现代移动通信系统.According to the basic principle of stepped impedance resonators SIR,a miniaturization coaxial cavity bandpass filter was designed by using λg/4 type SIR as the basic harmonic unit.Simulation results show that the length was compressed 56.7% compared to the actual size λg/4,the passband return loss was less than 17.5 dB,insertion loss was less than 0.1 dB,band rejection reaches-38.8 dB.This filter fully meets the modern mobile communication systems requirements of miniaturization,low insertion loss,high selectivity,so it can be widely used in modern mobile communication systems.

关 键 词：同轴腔体滤波器 阶跃阻抗谐振器 仿真优化 

分 类 号：TB9-55[一般工业技术—计量学]