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频率可重构的单极子天线设计 被引量:2
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作者 成根 段美玲 +1 位作者 李文妮 韩丽萍 《测试技术学报》 2017年第2期148-152,共5页
本文设计了一种频率可重构的单极子天线.天线由一个阶梯型馈线、两个L型枝节和一个矩形接地板组成.两个理想开关加载在馈线与枝节之间,通过控制开关状态改变天线的表面电流分布,从而实现频率可重构.天线的尺寸为35mm×40mm.仿真和... 本文设计了一种频率可重构的单极子天线.天线由一个阶梯型馈线、两个L型枝节和一个矩形接地板组成.两个理想开关加载在馈线与枝节之间,通过控制开关状态改变天线的表面电流分布,从而实现频率可重构.天线的尺寸为35mm×40mm.仿真和测量结果表明:该天线可以在两个单频模式(2.4GHz和5.2GHz)以及一个双频模式(2.4GHz/5.2GHz)之间切换.天线在不同模式下都具有稳定的辐射方向图. 展开更多
关键词 阶梯型馈线 频率可重构 单频模式 双频模式 单极子天线
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The Participatory, Payable, Profitable, and Potent (4p's) Insured Education System Model (IESM)" Analyses of Frequency and Variance by Categories (One-Way ANOVA)
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作者 Seniha Celikhan 《Journal of Modern Accounting and Auditing》 2014年第6期708-718,共11页
The biggest problem in the world as well as in Turkey is to increase efficiency of human capital, which can only be achieved by educating all people in accordance with their capacities and demands. And, the biggest pr... The biggest problem in the world as well as in Turkey is to increase efficiency of human capital, which can only be achieved by educating all people in accordance with their capacities and demands. And, the biggest problem in education is finance. In order for everybody to have education, there is a need to develop a finance system which will help overcome the financial problems faced by households or individuals. For this purpose, the participatory, payable, profitable, and potent (4p's) insured education system model (IESM) is developed. This paper focuses on principles of the IESM and the analyses of frequency and variance by categories (one-way ANOVA). 展开更多
关键词 INSURANCE education user competition auto-control PROFIT
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