C波段超宽带微型LTCC带通滤波器设计  

Design of C‑band Ultra‑wideband Micro LTCC Bandpass Filter

作　　者：施超 叶强 罗昌桅 SHI Chao;YE Qiang;LUO Changwei(College of Information Engineering,China Jiliang University,Hangzhou,310018,CHN)

机构地区：[1]中国计量大学信息工程学院,杭州310018

出　　处：《固体电子学研究与进展》2022年第2期119-123,共5页Research & Progress of SSE

摘　　要：基于低温共烧陶瓷(Low temperature co-fired ceramic,LTCC)技术设计了一款C波段超宽带、高抑制的带通滤波器,并通过LTCC技术对滤波器进行加工制作,满足了小体积、高性能、密集封装的应用需求。滤波器整体上采用了低通滤波器与高通滤波器串联的结构实现超宽通带,并引入传输零点来增加带外抑制,采用垂直叉指电容和双层螺旋电感来减少滤波器体积。最终实现的滤波器通带的中心频率为5.3 GHz,带宽为3 GHz,通带内插损小于0.8 dB,在DC~3 GHz处抑制达到了36 dB,在8~14 GHz处抑制达到了35 dB,通带回波损耗为12 dB。滤波器体积为:1.8 mm×1.0 mm×0.7 mm。A C-band ultra-wideband and high rejection bandpass filter based on low temperature co-fired ceramic(LTCC)technology was designed in this paper.The filter was processed by LTCC technology,which met the application requirements of small size,high performance and dense packaging.The structure of low-pass filter and high‑pass filter in series was adopted in the whole filter to obtain ultra-wide passband,transmission zeros were introduced to increase out-of-band suppression performance of the filter,and vertical interdigital capacitors and double-layer spiral inductors were adopted to reduce the size of the filter.Finally,the center frequency of the filter is 5.3 GHz,the passband insertion loss is less than 0.8 dB,the rejection reaches 36 dB at DC-3 GHz,35 dB at 8-14 GHz,and the passband return loss is 12 dB.The volume of the filter is:1.8 mm×1.0 mm×0.7 mm.

关 键 词：带通滤波器 低温共烧陶瓷 传输零点 双层螺旋电感 超宽带 

分 类 号：TN713[电子电信—电路与系统]