为满足第五代移动通信技术(5th Generation Mobile Communication Technology,5G)对高速数据速率的要求,提出一种新型5G全频段客户前置设备(Customer Premise Equipment,CPE)内置高增益天线。采用顶部开槽单极子与对称分支结构地面设计...为满足第五代移动通信技术(5th Generation Mobile Communication Technology,5G)对高速数据速率的要求,提出一种新型5G全频段客户前置设备(Customer Premise Equipment,CPE)内置高增益天线。采用顶部开槽单极子与对称分支结构地面设计,实现了紧凑型5G高增益全向天线,通过匹配微带线获得良好阻抗带宽。仿真和实测结果表明,该天线具有良好的全向辐射特性,频段可覆盖N7(2500~2570 MHz)、N38(2570~2620 MHz)、N41(2496~2690 MHz)、N48(3550~3700 MHz)、N77(3300~4200 MHz)、N78(3300~3800 MHz)和N79(4400~5000 MHz)等5个通信频段。其中,低频段效率为60%,高频段效率达到70%,测试结果与仿真结果基本一致。展开更多
In the process of tobacco production, the moisture content of tobacco leaves directly affects the quality of tobacco leaf. Since the water content in the leaf is low, it needs to process with the conditioning treatmen...In the process of tobacco production, the moisture content of tobacco leaves directly affects the quality of tobacco leaf. Since the water content in the leaf is low, it needs to process with the conditioning treatment for a short time beforetobacco grading, so as to improve the tobacco moisture content and reduce breakage, as well as ensure the quality and yield of tobacco, ahd meet the requirements of the follow-up process of tobacco. Therefore, a comprehensive overview was given to the pre-conditioning method for tobacco leaf, and the current application status of tobacco leaf pre-conditioning equipment in China was explored.展开更多
基金Supported by the Project of Zhengzhou Tobacco Company of Henan Province(201415)~~
文摘In the process of tobacco production, the moisture content of tobacco leaves directly affects the quality of tobacco leaf. Since the water content in the leaf is low, it needs to process with the conditioning treatment for a short time beforetobacco grading, so as to improve the tobacco moisture content and reduce breakage, as well as ensure the quality and yield of tobacco, ahd meet the requirements of the follow-up process of tobacco. Therefore, a comprehensive overview was given to the pre-conditioning method for tobacco leaf, and the current application status of tobacco leaf pre-conditioning equipment in China was explored.