本文介绍了一种基于平面肖特基势垒二极管的440GHz次谐波混频器,采用三维建模提取寄生参数的仿真方法,电路为石英基片悬置微带形式,反向并联二极管对倒置黏贴在基片上。电路中的无源结构以及二极管的线性寄生参数部分利用三维建模并进...本文介绍了一种基于平面肖特基势垒二极管的440GHz次谐波混频器,采用三维建模提取寄生参数的仿真方法,电路为石英基片悬置微带形式,反向并联二极管对倒置黏贴在基片上。电路中的无源结构以及二极管的线性寄生参数部分利用三维建模并进行有限元法分析,最后与二极管的非线性部分联合进行谐波平衡仿真,通过仿真优化获得二极管的最佳嵌入电路。最终,仿真结果显示在3.3m W的本振驱动功率下,射频频率420~460GHz范围内单边带变频损耗低于10d B,在437GHz附近取得最佳值7.3 d B。展开更多
Coating slurries for making anodes and cathodes of lithium batteries contain a large percentage of solid particles of different chemicals, sizes and shapes in highly viscous media. A thorough mixing of these slurries ...Coating slurries for making anodes and cathodes of lithium batteries contain a large percentage of solid particles of different chemicals, sizes and shapes in highly viscous media. A thorough mixing of these slurries poses a major challenge in the battery manufacturing process. Several types of mixing devices and mixing methods were examined. The conventional turbine stirrers or ball mill mixers could be adequately used for the preparation of anode slurries, but not suitable for cathode slurries. In this study, a newly three-dimensional mixer, in conjunction with a multi-stage mixing sequence was proposed. The mixing effectiveness was examined by means of rheological measurements and flow visualization techniques. Preliminary electrical performance results indicated that the battery obtained using the 3D mixing device with a multi-stage mixing sequence was more efficient to those obtained from conventional methods.展开更多
文摘本文介绍了一种基于平面肖特基势垒二极管的440GHz次谐波混频器,采用三维建模提取寄生参数的仿真方法,电路为石英基片悬置微带形式,反向并联二极管对倒置黏贴在基片上。电路中的无源结构以及二极管的线性寄生参数部分利用三维建模并进行有限元法分析,最后与二极管的非线性部分联合进行谐波平衡仿真,通过仿真优化获得二极管的最佳嵌入电路。最终,仿真结果显示在3.3m W的本振驱动功率下,射频频率420~460GHz范围内单边带变频损耗低于10d B,在437GHz附近取得最佳值7.3 d B。
文摘Coating slurries for making anodes and cathodes of lithium batteries contain a large percentage of solid particles of different chemicals, sizes and shapes in highly viscous media. A thorough mixing of these slurries poses a major challenge in the battery manufacturing process. Several types of mixing devices and mixing methods were examined. The conventional turbine stirrers or ball mill mixers could be adequately used for the preparation of anode slurries, but not suitable for cathode slurries. In this study, a newly three-dimensional mixer, in conjunction with a multi-stage mixing sequence was proposed. The mixing effectiveness was examined by means of rheological measurements and flow visualization techniques. Preliminary electrical performance results indicated that the battery obtained using the 3D mixing device with a multi-stage mixing sequence was more efficient to those obtained from conventional methods.
