小型化多层带线谐振腔缺陷地结构LTCC宽带带通滤波器

利用多层宽边耦合带状线谐振结构实现小型化LTCC(LowTemperature Co-fired Ceramic)宽带滤波器。采用了两层、三层耦合带线谐振结构,利用这两种谐振结构可以有效减小滤波器的尺寸。利用四个谐振腔结构,实现较宽的频带和较强的选择特性;输出、输入引入电感反馈产生两个传输零点,利用DGS(Defected Ground Struc-ture)可使滤波器在阻带和镜像频率处产生较大的衰减。设计出侧面印刷互连和侧面通孔互连两种工艺结构的滤波器,利用LTCC工艺加工出侧面印刷互连的滤波器性能良好,测试性能和仿真结果基本吻合。

Miniature LTCC Broadband Bandpass Filters Using Multilayer Coupled Stripline Resonators with Defected Ground Structure

A novel multilayer coupled stripline resonator structure is introduced to realize miniature broadband bandpass filters.Two possible filter configurations are proposed in this paper: two-layer coupled stripline resonators with shielded layers connected by side metal printing and three-layer coupled stripline resonators with shielded layers connected by side metal vias.Wider band and good selectivity are obtained by exploiting four resonators.By using the defected ground structure(DGS),the filter exhibits a high rejection in stopband.The technology of low temperature co-fired ceramic(LTCC) is employed to manufacture the filters.Experiment results of one kind of the filters are presented and the measurement data are in agreements with the results of the simulation.