基于界面电磁学的新型相控阵天线

界面电磁学是电磁学领域的一个前沿研究方向, 对于新型微波和天线器件设计具有重要的理论指导意义.文章对界面电磁学进行了简要介绍, 包括其发展历程、学科定位, 以及关键研究内容.还进一步提出了基于界面电磁学的相控阵天线设计新思路, 并给出了多个相控阵天线设计实例, 包括采用旋转式电磁表面的微马达相控阵、采用电调数字表面的超大口径相控阵(10 240单元)、超高频率相控阵(96 GHz)和透射式相控阵.最后介绍了新型相控阵在微波/毫米波安检成像系统中的应用, 实验结果证明了全电调快速空间成像的可行性与成像精度.

Novel phased array antennas based on surface electromagnetics

As a new research frontier in electromagnetics (EM), surface electromagnetics (SEM) provides important theoretical guidelines for novel microwave and antenna devices. This paper presents a brief overview of surface electromagnetics, including development history, scientific importance, and critical research topics. Furthermore, a novel SEM-based design methodology is proposed for phased array antennas, and several examples are presented, including a micromotor-controlled phased array using rotatable EM surface, a super-large phased array (10 240 elements), a very high frequency phased array (96 GHz), and a transmission-type phased array, all using electronic-tunable EM surfaces. Finally, the proposed phased array is applied in a microwave/millimeter wave security imaging system, and experimental results demonstrate the feasibility and accuracy of the fast all-electronic space imaging system.