Abstract:Radar absorbing materials (RAM) can effectively inhabit the transmitted waves and the reflected waves widely applied in the field of stealth technology, electromagnetic shielding and compatibility, as well as wireless communications. Suffering from frequency dispersion of electromagnetic parameters, the traditional EAMs still be up against a challenge in further improvement of broadband absorption in the low frequency. Recently, with the development of metamaterial design, the achievement of broadband absorption based on metamaterial configurations exhibits more performance improvement due to its flexible capability of electromagnetic manipulation. The paper centers on the research progresses in radar absorbing materials based on metamaterial structure with the aid of development background, design principles and property characteristic. Specifically, the broadband radar absorbing metamaterials are in detail introduced based on the multiresonanceintegrated absorbing structure, metamaterial absorbing structure combined with traditional material, threedimensional array absorbing structure, as well as spoof surface plasmon polaritons absorbing structure. Furthermore, the paper looks forward to the future of the broadband radar absorbing meta-material.