具有谐波抑制特性的LTCC带通滤波器新设计  

A New Design of LTCC Band-pass Filter with Harmonics Suppression

作　　者：戴永胜[1] 韩群飞[1] 尹洪浩[1] 左同生[1] 谢秋月[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：《电讯技术》2012年第12期1964-1968,共5页Telecommunication Engineering

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

摘　　要：提出了一种新型的具有多次谐波抑制功能的低温共烧陶瓷（眦c）微型带通滤波器，该滤波器电路由电感耦合的四阶谐振腔组成。在一般抽头式梳状线滤波器设计的基础上，引入了交叉耦合，通过改进其结构，形成了多个传输零点，并结合电路仿真以及三维电磁场仿真，辅之以DOE（DesignofEx—perirnent）的设计方法，设计出了一种尺寸小、频率选择性好、阻带宽的滤波器。实际测试结果与仿真结果吻合较好，中心频率为13．4GHz，其3dB带宽为200MHz，在15．5～35G比频率上的衰减均优于20dB，体积仅为3．2mm×1．6mm×1．2mm。所提方法对滤波器谐波抑制的设计具有指导作用。A novel low-temperature co-fired ceramics （LTCC） band-pass filter（BPF） with spurious responses suppression is proposed. The circuit of this filter is composed of 4-order resonant cavity by inductance coupling. The more transmission zeros are realized by adding modified cross-coupling. Based on the design of the tapped combline filter, combined with circuit simulation and 3-D EM（Electromagnetic） simulation, the filter which can achieve a small size, high selectivity, wide stop-band responses is designed with the help of DOE（design of ex- periment）. The measured results of the filter agree well with the electromagnetic simulation. Simulation and measured results show that the BPF has a central frequency of 13.4 GHz,the 3 dB bandwidth is 200 MHz,and the stop-band attenuation is more than 20 dB from 15.5 GHz to 35 GHz. The final size of the fabricated filter is only 3.2 mm× 1.6 mm×1.2 mm. The proposed method is of guidance for the design of filters with harmonics

关 键 词：带通滤波器 交叉耦合 低温共烧陶瓷 谐波抑制 

分 类 号：TN713[电子电信—电路与系统]