We design a perfect field concentrator from a singular radial mapping. Such a device can be implemented using alternating radial slices of zero index metamaterials and perfect electric conductors. Numerical simulation...We design a perfect field concentrator from a singular radial mapping. Such a device can be implemented using alternating radial slices of zero index metamaterials and perfect electric conductors. Numerical simulations are performed to verify its functionality.展开更多
传统的Vivaldi天线具有超宽带优点,但存在定向性较差,且在工作频带的两端增益下降严重的问题。文中提出了一种高增益的Vivaldi天线,通过对传统微带线馈电结构的Vivaldi超宽带天线加载零折射率超常介质和轴向边缘梳状结构的矩形槽缝结构...传统的Vivaldi天线具有超宽带优点,但存在定向性较差,且在工作频带的两端增益下降严重的问题。文中提出了一种高增益的Vivaldi天线,通过对传统微带线馈电结构的Vivaldi超宽带天线加载零折射率超常介质和轴向边缘梳状结构的矩形槽缝结构,提高了天线在整个工作频段内的增益。对所提出的天线进行了设计、优化和仿真分析,并制作天线样品,仿真和测试结果吻合良好。测试与仿真结果表明,在4~11 GHz的工作频段内,天线的回波损耗优于-10 d B;与传统Vivaldi天线相比,在整个工作频段内天线增益均有所提高,其中在工作频率的低端（4~6 GHz）天线增益提高2.5 d B,高端（9~11 GHz）增益提高1.5 d B。展开更多
基金the National Natural Science Foundation of China(91850206,11974261)the Shanghai Science and Technology Committee(18ZR1442900)+2 种基金Science and Technology Innovation Group of Shanxi Province,China(201805D131006)Key Research and Development Program of Shanxi Province,China(201903D121026)The Central Government guides local science and Technology Development Fund projects(Grant No.YDZJSX2021B011)。
文摘We design a perfect field concentrator from a singular radial mapping. Such a device can be implemented using alternating radial slices of zero index metamaterials and perfect electric conductors. Numerical simulations are performed to verify its functionality.
文摘传统的Vivaldi天线具有超宽带优点,但存在定向性较差,且在工作频带的两端增益下降严重的问题。文中提出了一种高增益的Vivaldi天线,通过对传统微带线馈电结构的Vivaldi超宽带天线加载零折射率超常介质和轴向边缘梳状结构的矩形槽缝结构,提高了天线在整个工作频段内的增益。对所提出的天线进行了设计、优化和仿真分析,并制作天线样品,仿真和测试结果吻合良好。测试与仿真结果表明,在4~11 GHz的工作频段内,天线的回波损耗优于-10 d B;与传统Vivaldi天线相比,在整个工作频段内天线增益均有所提高,其中在工作频率的低端（4~6 GHz）天线增益提高2.5 d B,高端（9~11 GHz）增益提高1.5 d B。
