小型化宽阻带抑制LTCC低通滤波器设计  

Design of a Miniaturized LTCC Low-pass Filter with Wide Stop-band Suppression

作　　者：郑琨[1] 王子良[1,2] 戴雷[1] 严蓉[1] 徐利[1] 陈昱晖[1] 

机构地区：[1]南京电子器件研究所,南京210016 [2]微波毫米波单片集成和模块电路重点实验室,南京210016

出　　处：《固体电子学研究与进展》2015年第2期156-160,共5页Research & Progress of SSE

摘　　要：设计了一款基于低温共烧陶瓷(LTCC)工艺的小型化宽阻带抑制低通滤波器,该滤波器的体积仅为3.2mm×1.6mm×1.0mm。设计时为了增强阻带的抑制作用,以具有一个传输零点的低通滤波器为原型,通过合理设置各个元件的外形及位置,有效地利用了结构内部的电磁耦合效应,额外形成了多个传输零点,产生了较好的宽阻带抑制效果。该滤波器截止频率为2.4GHz,通带内最大插入损耗为1dB,在3.8、6.2和7.15GHz处阻带抑制分别达到46、65和52dB。另外,从7.2GHz到12GHz阻带抑制均大于20dB,在电路中利用该滤波器可有效地防止寄生通带的产生,减少其他频段的信号干扰,增强电路的抗干扰能力。A miniaturized LTCC low-pass filter（LPF）with wide stop-band suppression was designed in this article and its size was only 3.2mm×1.6mm×1.0mm.A LPF prototype with a transmission zero was utilized here to enhance the inhibitory effect.In addition,the electromagnetic coupling effect inside the structure was effectively used by reasonably setting the shape and the location of the components,which lead to plurality of transmission zeros and excellent wide stop-band rejection.The cut-off frequency of the filter is 2.4GHz and the maximum pass-band insertion loss is only 1dB.The suppression of the stop-band at 3.8GHz,6.2GHz and 7.15 GHz is 46 dB,65dB and 52 dB respectively,indicating the effective suppression of the high-order harmonics.Moreover,the suppression from 7.2GHz to 12 GHz is greater than 20 dB.Such a wide stop-band range not only prevents the generation of spurious pass band effectively,but also reduces the signal interference of the other band in an applied circuit,so that the anti-intercerence ability of the circuit is enhanced.

关 键 词：低温共烧陶瓷 低通滤波器 宽阻带抑制 小型化 

分 类 号：TN713[电子电信—电路与系统]