Analysis and applications of a frequency selective surface via a random distribution method

A novel frequency selective surface （FSS） for reducing radar cross section （RCS） is proposed in this paper. This FSS is based on the random distribution method, so it can be called random surface. In this paper, the stacked patches serving as periodic elements are employed for RCS reduction. Previous work has demonstrated the efficiency by utilizing the microstrip patches, especially for the reflectarray. First, the relevant theory of the method is described. Then a sample of a three-layer variable-sized stacked patch random surface with a dimension of 260 mm x 260 mm is simulated, fabricated, and measured in order to demonstrate the validity of the proposed design. For the normal incidence, the 8-dB RCS reduction can be achieved both by the simulation and the measurement in 8 GHz-13 GHz. The oblique incidence of 30° is also investigated, in which the 7-dB RCS reduction can be obtained in a frequency range of 8 GHz-14 GHz.     

用于大规模深度卷积分类网络DOA估计的标签分解方法

为了有效地解决使用深度神经网络求解波达方向(DOA)估计涉及到的大规模分类器的训练和部署实现,本文提出将传统的one-hot分类器分解为多个类别互质的小分类器,然后联合使用多个互质分类器的分类结果重构原始one-hot标签.首先使用标签分解,将原始标签分解为多个互质的小标签,小标签对应的类别为原始类别对质数取余数的结果...     

伞形印刷偶极子天线设计

针对数字阵列雷达设计了一种伞形印刷偶板子天线单元.该天线由微带集成巴伦馈电,具有宽频带、宽波束、易于集成等优点.通过仿真和测试,表明该天线有40％的相对带宽,E面波束宽度为80°,H面波束宽度为135°.