多传输零点基片集成波导双通带滤波器-上海大学学报.PDF

第 20 卷 第 3 期 （自然科学版） Vol. 20 No. 3 2014年6月 JOURNAL OF SHANGHAI UNIVERSITY (NATURAL SCIENCE) June 2014 DOI: 10.3969/j.issn.1007-2861.2013.07.024 多传输零点基片集成波导双通带滤波器 程孝奇, 李国辉, 鉴 浩, 彭太维 (上海大学 特种光纤与光接入 网省部共建重点实验室, 上海 200072) 摘摘摘要要要: 提 出一种新型 的基片集成波导(substrate integrated waveguide, SIW)双通带滤波器. 该滤波器 由2 个不 同中心频率、不 同带宽的滤波器组成, 共用输入输 出端 口, 并采用矩形基片 集成波导谐振腔结构, 通过在源与负载之间引入 电耦合产生多个传输零点, 从而大大提高了滤 波器 的选择特性. 设计 了一款工作在 Ku 波段的基片集成波导双通带滤波器, 两通带带宽分别 为 220 和 120 MHz. 利用 Ansoft HFSS 建立滤波器模型并进行全波仿真. 仿真结果表 明, 该滤 波器带外衰减陡峭, 结构紧凑. 实测结果与仿真结果吻合 良好. 关关关键键键词词词 : 传输零点; 双通带滤波器; 基片集成波导; 电耦合 中中中图图图分分分类类类号号号 : TN 713+ .5 文文文献献献标标标志志志码码码 : A 文文文章章章编编编号号号 : 1007-2861(2014)03-0330-07 Substrate Integrated Waveguide Dual-Band Filter with Multi-transmission Zeros CHENG Xiao-qi, LI Guo-hui, JIAN Hao, PENG Tai-wei (Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China) Abstract: A novel dual-band filter based on the substrate integrated waveguide (SIW) is proposed. The filter is composed of two filters with different center frequencies and bandwidths. The two filters share the same input and output ports and use a rectangu- lar substrate integrated waveguide cavity structure. Multi-transmission zeros have been obtained by electrical coupling between the source and the load, greatly improving the frequency-selective characteristics of the filter. A Ku-band substrate integrated waveguide dual-band filter is designed, with bandwidths of 220 and 120 MHz for the two pass-bands. A model with full-wave simulation is