微型蓝牙LTCC平衡滤波器的设计与研究  

Design and Research of a Miniaturized LTCC Balance Filter for Bluetooth Application

作　　者：戴永胜[1] 冯媛[1] 尹洪浩[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》2012年第6期556-560,共5页Research & Progress of SSE

基　　金：国家重点基础研究发展计划973计划资助项目(2009CB320200);国家国防重点实验室基金资助项目(9140C1402021102)

摘　　要：提出一种基于低温共烧陶瓷(LTCC)技术实现的小型化平衡滤波器。该平衡滤波器频率范围为2.4～2.5GHz,可广泛应用于蓝牙通讯系统。在设计时利用垂直通孔互连工艺技术将滤波器和巴伦进行互连,并且集成在一个模块中,其中,蓝牙滤波器的设计采用半集总结构,Marchand巴伦采用独特的螺旋线宽边耦合带状线结构(SBCS),极大地缩小了巴伦尺寸。实现了具有阻抗变换功能的蓝牙波段微型平衡滤波器,其尺寸仅为2.5mm×2.0mm×1.2mm。测试结果表明,该平衡滤波器带内差损小于1.8dB,相位不平衡度小于±6°,均满足设计指标要求。This paper presents a miniaturized balance filter based on low temperature co-fired ceramic （LTCC）. Its frequency range is 2.4~2.5 GHz, and can be widely applied to bluetooth communication. Balun and filter are integrate as a whole in a single module by the vertical through-hole interconnect process technology. The bluetooth filter is designed by semi-lumped structure, and the Marchand balun is realized with spiral boardside coupling stripline （SBCS） which contributes dramatically to the reduction of the dimension. A miniaturized bluetooth band balance filter with the impedance transformation function have been achieved, as the size is only 2.5 mm 2.0 mm X 1.2 mm. Measurement results show that the balance filter insertion loss is less than 1.8 dB and phase difference is no more than± 6 which meet design requirements.

关 键 词：平衡滤波器 低温共烧陶瓷 蓝牙 阻抗转换 

分 类 号：TN713[电子电信—电路与系统]