含源-负载耦合的准椭圆函数滤波器小型化优化设计  

Miniaturization Optimum Design of Quasi-elliptic Function Filter with Source-load Cross-coupling

作　　者：李平[1] 雷振亚[1] 谢拥军[1] 邢连发[1] 山团彪[1] 

机构地区：[1]西安电子科技大学天线与微波技术国家重点实验室,陕西西安710071

出　　处：《现代电子技术》2010年第19期15-18,21,共5页Modern Electronics Technique

基　　金：教育部新世纪优秀人才(NCET-04-0950)资助课题

摘　　要：提出一种新型含源-负载耦合的交叉耦合微带带通滤波器,该滤波器的传输特性由分布在介质上下表面的开环谐振器通过引入位于两介质层中间公共地板上的开缝耦合得到,且将位于顶层的源引入底层,实现了层间源、负载的容性耦合,确保了带外的传输零点,并对源、负载间的耦合进行了等效电路分析。与传统边缘耦合的平面结构滤波器相比,体积减小为原来的一半,且带外抑制良好。三维仿真软件HFSS用来计算该滤波器的耦合系数,并协同Ansoft公司的Designer,通过对参数的提取来迭代优化该滤波器,有效地减少了滤波器的优化时间。对滤波器进行了仿真与实测,其结果表明,实测与理论值、仿真值吻合较好。A novel microstrip band-pass filter with source-load coupling is presented in the paioer. The transmission characteristics of the filter can be satisfied through introducing the aperture in the common ground between two substrates. The source at the top-layer is introduced into the bottom-layer to realize the capacitive coupling of source and load between lay- ers, and ensure the transmission zeros of stop-band. The analysis of the equivalent circuit for the coupling between the source and load is performed. Compared to the traditional planar structures filters, the filter is half in size and has better out-of-band rejection performance. 3D simulation software HFSS is used to calculate the coupling coefficient of the filter, which is optimized in combination with Ansoft＇s Designer to improve its performances through parameter extraction, and reduce the optimization time effectively. The measured result is in good agreement with theoretical and simulated results.

关 键 词：开环谐振器 多层结构 小型化 参数提取 

分 类 号：TN713-34[电子电信—电路与系统]