毫米波宽带超表面MIMO天线北大核心CSCD

本文设计了一款毫米波宽带超表面MIMO天线。基于特征模分析设计了宽带超表面天线单元，从而使其组成的MIMO天线具有宽带特性。为了改善天线的隔离度，在天线单元之间引入了金属化通孔以及隔离金属条带。天线整体仅使用了一层介质基板，通过同轴探针进行馈电，结构简单且易于集成，具有低剖面的优点。仿真结果显示，在21.3～31GHz(37%)频段内，天线匹配良好，隔离度不低于20dB，并且带内最高可实现增益可达8.1dBi。

Angle Correction Method of Ship Target RCS Dynamic Measurement Data

RCS dynamic measurement can obtain the target RCS in the real environment, which is one of the important means to study the characteristics of the target and the environment. Aiming at the problem that the RCS measurement data cannot directly correspond to the target measurement angle in the dynamic measurement of ship target RCS because of the attitude and position of the target are constantly changing, two methods for correcting the angle of the measurement data are proposed in this paper. The two methods use coordinate system conversion and angle calculation to obtain the time series of the measurement angle, and comprehensively process the time series of the RCS measurement data to obtain the corresponding relationship between the measurement data and the angle, which supports ship target RCS reduction and feature simulation research. The effectiveness and correctness of the proposed methods are verified by experiments.