Beeharry Thtreswar, Yahiaoui Riad, Selemani Kamardine, Ouslimani Habiba Hafdallah
Laboratoire Energétique Mécanique Electromagnétisme, Université Paris Nanterre, 92410 Ville d'Avray, France.
Constructions Mécanique de Normandie, Systems department, 50105 Cherbourg, France.
Materials (Basel). 2018 Sep 9;11(9):1668. doi: 10.3390/ma11091668.
In this article, a single layer co-polarization broadband radar absorber is presented. Under normal incidence, it achieves at least 90% of absorption from 5.6 GHz to 9.1 GHz for both Transverse Electric (TE) and Transverse Magnetic (TM) polarizations. Our contribution and the challenge of this work is to achieve broadband absorption using a very thin single layer dielectric and it is achieved by rotating the resonating element by 45 ∘ . An original optimized Underlined U shape has been developed for the resonating element which provides a broadband co-polarization absorption. The structure is 12.7 times thinner than the wavelength at the center frequency. To understand the absorption mechanism, the transmission line model of an absorber and the three near unity absorption peaks at 5.87 GHz, 7.16 GHz and 8.82 GHz have been used to study the electric and magnetic fields. The physical insight of how the three near unity absorption peaks are achieved has also been discussed. After fabricating the structure, the measurements were found to be in good agreement with the simulation results. Furthermore, with the proposed original UUSR resonating element, the operational bandwidth to thickness ratio of 6.43 is obtained making the proposed UUSR very competitive.
本文提出了一种单层同极化宽带雷达吸波器。在垂直入射情况下，对于横向电场（TE）和横向磁场（TM）极化，它在5.6 GHz至9.1 GHz范围内均实现了至少90%的吸收。我们这项工作的贡献和挑战在于使用非常薄的单层电介质实现宽带吸收，这是通过将谐振元件旋转45°来实现的。已为谐振元件开发了一种原始优化的带下划线的U形，它提供宽带同极化吸收。该结构比中心频率处的波长薄12.7倍。为了理解吸收机制，利用吸波器的传输线模型以及在5.87 GHz、7.16 GHz和8.82 GHz处的三个接近单位吸收峰来研究电场和磁场。还讨论了如何实现这三个接近单位吸收峰的物理见解。制作该结构后，发现测量结果与模拟结果吻合良好。此外，使用所提出的原始UUSR谐振元件，获得了6.43的工作带宽与厚度比，这使得所提出的UUSR具有很强的竞争力。
