微型蓝牙LTCC平衡滤波器的设计与研究
|
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×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.
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×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.
引文
[1]Piatnistaf V,Jakku E,Leppaevuori S.Design of a 2-Pole LTCC filter for wireless communications[C].IEEE Transmission Wireless Communications,2004,3:379-381.
[2]Dai Yongsheng,Tang Xiongxin,Zhou Wenkan,etal.A miniaturized LTCC low-pass filter based on thelumped circuit model[C].International Conference onMicrowave and Millimeter Wave Technology(ICMMT),2010:1578-1580.
[3]杜泽保,朱,张海英,等.基于UWB系统的巴伦滤波器组合器件[J].微波学报,2010(S1):351-354.
[4]姚友芳.微型LTCC平衡滤波器的研究[D].南京理工大学学位论文,2010.
[5]Wang Lifa,Yang Ruixia,Wu Jingfeng.A compactLTCC balun for bluetooth/WLAN application[C].2010 6th International Conference on Wireless Com-munications Networking and Mobile Computing(WiCOM),2010:1-3.
[6]阎世强,林强.双耦合线巴伦设计[J].现代雷达,2008,30(1):77-79.
[7]Dai Yongsheng,Zhang Haishen,Qi Gaopin,et al.LTCC bandpass filter for bluetooth application withdual transmission zeros[C].International Conferenceon Microwave and Millimeter Wave Technology(ICMMT),2008:284-286.
[2]Dai Yongsheng,Tang Xiongxin,Zhou Wenkan,etal.A miniaturized LTCC low-pass filter based on thelumped circuit model[C].International Conference onMicrowave and Millimeter Wave Technology(ICMMT),2010:1578-1580.
[3]杜泽保,朱,张海英,等.基于UWB系统的巴伦滤波器组合器件[J].微波学报,2010(S1):351-354.
[4]姚友芳.微型LTCC平衡滤波器的研究[D].南京理工大学学位论文,2010.
[5]Wang Lifa,Yang Ruixia,Wu Jingfeng.A compactLTCC balun for bluetooth/WLAN application[C].2010 6th International Conference on Wireless Com-munications Networking and Mobile Computing(WiCOM),2010:1-3.
[6]阎世强,林强.双耦合线巴伦设计[J].现代雷达,2008,30(1):77-79.
[7]Dai Yongsheng,Zhang Haishen,Qi Gaopin,et al.LTCC bandpass filter for bluetooth application withdual transmission zeros[C].International Conferenceon Microwave and Millimeter Wave Technology(ICMMT),2008:284-286.