基于界面电磁学的新型相控阵天线

Novel phased array antennas based on surface electromagnetics

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(96GHz)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.

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.