微型LTCC四级带通滤波器的设计  

The Design of a Miniature LTCC Bandpass Filter

作　　者：严浩嘉 李博文[1] 戴永胜[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《固体电子学研究与进展》2017年第3期191-194,共4页Research & Progress of SSE

基　　金：国家重点基础研究发展973计划资助项目(2009CB320201);国家国防重点实验室基金资助项目(9140C1402021102)

摘　　要：提出了一种微型LTCC四级带通滤波器的实现方法。该带通滤波器由四个性能良好的谐振器组成,通过交叉耦合实现传输零点从而达到良好的阻带衰减。通过电路仿真以及电磁场三维仿真软件进行三维建模,对模型进行加工测试,滤波器的测试结果与电磁仿真结果相匹配。四级带通滤波器的中心频率为5.25GHz,带宽为500 MHz,通带范围内插入损耗均优于1.59dB,在0~4.65GHz频率以及6.33GHz频率以上的带外衰减均优于40dB,尺寸仅为2.5mm×3.2mm×1.5mm。本设计采用了带状线分布式结构来实现滤波器的微型化。An implementation method of a miniature LTCC four-order bandpass filter was presented.The bandpass filter is composed of four excellent resonators.Through cross coupling,transmission zero is realized so as to lead to good stopband attenuation.Three-dimensional modeling was performed via the circuit simulation and three-dimensional electromagnetic field simulation software.After fabrication of the filter,it is shown that the measurement results and simulation ones are consistent.This four order bandpass filter has a central frequency of 5.25 GHz with a bandwidth of 500 MHz.Within the scope of pass band,its insertion loss is more than 1.59 dB.The out-of-band attenuations at 0~4.65 GHz and above 6.33 GHz are both more than 40 dB.The size of filter is only 2.5mm×3.2mm×1.5mm.Strip line distributed structure is adopted in this design to realize the miniaturization of filter.

关 键 词：带通滤波器 带状线 微型化 低温共烧陶瓷 传输零点 

分 类 号：TN713[电子电信—电路与系统]