基于横向滤波器理论的小型超宽带差分带通滤波器  

Compact Differential Ultra-Wideband Bandpass Filter Based on Transversal Filter Concepts

作　　者：杨立生 冯文杰[2] 

机构地区：[1]正德职业技术学院电子与信息技术系,江苏南京211106 [2]南京理工大学通信工程系,江苏南京210094

出　　处：《电子学报》2012年第12期2539-2543,共5页Acta Electronica Sinica

摘　　要：本文提出了一种基于横向滤波器理论的小型超宽带差分滤波器结构.由于输入/输出端口之间具有两条不同电长度的传输路径,使得差模信号的通带两端具有两个传输零点并且具有良好的谐波抑制特性.四条1/4波长的短路线被用来改善差模信号的通带特性.另外,共模信号可以很容易在整个频段上得到抑制.加工结构模型的测试结果表明:差模信号的相对带宽为102%,带内的回波损耗大于15dB.实验测试结果与理论仿真结果吻合较好.A compact differential ullra-wideband （UWB） bandpass filter based on transversal filter concepts is proposed. Two transmission zeros and good harmonic suppression can be achieved for the differential mode, due to the two Iransmission paths with different lengths for input/output ports.Four quarter-wavelength shorted lines are added to improve the passband transmission characteristic for the differential mode. In addition, the common mode can be prone to be suppressed in the whole frequency band. A prototype with fractional bandwidth 102% and return loss greater than 15 dB for differential mode is designed and fabricated for demonslration; the measured results closely approach the theoretical expectations.

关 键 词：超宽带(UWB) 差模 横向滤波器理论 共模 

分 类 号：TN13[电子电信—物理电子学]