A New Design for Two-layer Thin Wideband Radar Absorber

With the rapid development of electronic and communication technology, electromagnetic wave absorption and interference shielding has been becoming more and more important in electromagnetic (EM) applications. Today, radar absorber has been an one of the most efficient ways to address problems resulting from electromagnetic pollution and interference. What’s more, in order to cover a wider frequency range, we design a two-layer absorber rather than a single-layer absorber. In this work, we propose a novel two-layer thin wideband radar absorber with two types of materials, Ni0.8Co0.2Fe2O4 nanofibers (NCFO NFs) and Ni-C hybrid nanofibers (Ni-C NFs). And we use NCFO NFs as the matching layer and Ni-C NFs as the matching layer to achieve the better microwave absorption. It has better performance at the radar working frequency, 2.0–18.0 GHz. In addition, it can achieve a wide bandwidth, covering the 82.5% of X-band and the 100% of Ku-band, with a total thickness of 3.0 mm.