【摘 要】
：
In this paper, a multi-band metasurface (MS) antenna array with low radar cross section (RCS) performance is pro-posed and measured. Firstly, a 4 × 4 antenna a
【机 构】
：
Information and Navigation College of Air Force Engineering University, Xi’an 710077, China
论文部分内容阅读
In this paper, a multi-band metasurface (MS) antenna array with low radar cross section (RCS) performance is pro-posed and measured. Firstly, a 4 × 4 antenna array is composed of four 2 × 2 Jerusalem cross structure antenna arrays working at different frequency bands, which is aimed at enhancing the bandwidth effectively. Then, each antenna can be seen as a unit of MS in spite of adding the feeding structure. Based on phase cancellation principle, the MS is arranged into a chessboard configuration in order to realize wideband RCS reduction. Thus, excellent radiation and scattering char-acteristics are obtained simultaneously. Simulated and measured results indicate that this work provides a novel method to achieve bandwidth expansion as well as wideband RCS reduction of the antenna array.
其他文献
Electrorheological (ER) fluid is a type of smart fluid whose shear yield stress relies on the exteal electrical field strength.The transition of ER fluid micros
幸福是什么？从古到今一直争论不休。康德感叹说：“不幸的是，幸福的概念是如此模糊，以至虽然人人都在想得到它，但是，谁也不能对自己所决定追求或选择的东西说得清楚明白，条理一贯。” 据盖洛甫2005-2009年民意调查显示，中国人的幸福指数在世界155个国家中与加纳、肯尼亚并列125位，排在阿富汗之后。按理说中国经过近30年的飞速发展，已跃升为世界第二大经济实体，人们的物质生活水平极大提高，甚至奢侈品
Frequency tunability has become a subject of conce in the field of high-power microwave (HPM) source research.However,little information about the corresponding
“JC”草莓引自日本,适应性广,具有丰富的营养价值、广阔的市场、很高的经济价值,适于很多地区大面积栽植。但传统的繁殖方式周期长、繁殖系数低、种苗退化快。因此,本试验以
Hybrid liquid/solid electrolytes (HLSEs) consisting of conventional organic liquid electrolyte (LE),polyacrylonitrile (PAN),and ceramic lithium ion conductor Li
The instabilities of indium-zinc oxide thin film transistors under bias and/or illumination stress are studied in this paper.Firstly,illumination experiments ar
The inhomogenous ocean waveguide,which leads the amplitude and phase of the signal arriving at a hydrophone array to fluctuate,is one of the causes that make th
慈姑（Sagittaria sagittifolia L.）是泽泻科慈姑属多年生宿根浅水草本植物,是我国重要的水生蔬菜,在我国各地均有种植,主要分布在长江流域及其以南各省,栽培面积每年在20000hm2
雄性不育系制种是甘蓝类蔬菜杂交种生产的主要途径。Ogura细胞质雄性不育败育彻底、转育容易，是甘蓝类蔬菜雄性不育系制种中应用最广泛的胞质不育类型。但Ogura细胞质雄性不育
The instantaneous reversible soft logic upset induced by the electromagnetic interference (EMI) severely affects the performances and reliabilities of complemen