基于人工电磁材料的新型电磁隐身机制——电磁隐身斗篷

A Novel Electromagnetic Stealth Method—Electromagnetic Invisible Cloaks

电磁隐身是指通过缩减目标的散射截面来降低目标的可探测性。电磁隐身可大大提高武器装备的突防能力和生存率,在现代战争中具有极其重要的意义。2006年,英国物理学家Pen-dry等人提出了一种新型的电磁隐身机制——电磁隐身斗篷(Electromagnetic invisibility cloaks),它突破了传统隐身技术的设计思路,使得"完全隐身"成为可能,引起了国际电磁学和光学界的广泛兴趣。首先介绍了电磁隐身斗篷的机理和研究进展,然后基于变换光学理论(Transformation optics)研究了任意形状隐身斗篷的理论设计方法,并给出了相应的数值仿真结果。

The concept of the stealth technology is to lower the detected probability of one object by reducing the object＇s Radar Cross Section （RCS）. Stealth technology can highly improve the anti-defense ability and the survival rate of arm equipments, and plays important roles in modern wars. In 2006, professor Pendry et. al. proposed a novel stealth method -- Electromagnetic Invisibility Cloak. This is a notable breakthrough over the design concept of the conventional stealth technology, it makes the＂perfect invisibility＂ possible in theory, and attracts extensive attentions in electromagnetics and optics society. In this paper, a brief review over the theory and the research progress of the Invisibility Cloak was given first. Then, the theoretical method to design cloaks with arbitrary geometries was investigated based on Transformation Optics theorem, and the corresponding numerical results were presented.