小型的交叉耦合阶梯阻抗谐振器带通滤波器

一种小型的交叉耦合阶梯阻抗谐振器带通滤波器

内容简介：利用小型化的阶梯阻抗谐振器设计了一种交叉耦合带通滤波器.引入的交叉耦合结构在带外产生了一对传输零点以更好地抑制带外干扰信号而不影响通带特性.由于采用了小型化的阶梯阻抗谐振器,交叉耦合带通滤波器尺寸大为减小,同时寄生通带移向更高端.实验和仿真结果基本一致.

Abstract：A cross-coupled bandpass filter(BPF)using miniaturized stepped impedance resonator(SIR)and tapped input/output(I/O)ports is proposed.The cross-coupled structure is introduced to exhibit a single pair of transmission zeros near the passband at finite frequencies,which can be adjusted for better rejection of interference signal without sacrificing the passband response.The optimal design for miniaturized stepped impedance resonator is employed in order to reduce the size of filter.The spurious responses are shifted to higher frequency due to the SIR effect.The experimental results show good agreement with the simulation results.

作者：庞宏, 金海炎,

关键词：传输零点, 带通滤波器, 阶梯阻抗谐振器, 交叉耦合