The T-square fractal two-dimensional phononic crystal model is presented in this article.A comprehensive study is performed for the Bragg scattering and locally resonant fractal phononic crystal.We find that the band ...The T-square fractal two-dimensional phononic crystal model is presented in this article.A comprehensive study is performed for the Bragg scattering and locally resonant fractal phononic crystal.We find that the band structures of the fractal and non-fractal phononic crystals at the same filling ratio are quite different through using the finite element method.The fractal design has an important impact on the band structures of the two-dimensional phononic crystals.展开更多
For decades,the rapid development of wireless communication has provided people a smarter way of living.However,a significant increase in electromagnetic pollution is an unavoidable consequence.Evading radar detection...For decades,the rapid development of wireless communication has provided people a smarter way of living.However,a significant increase in electromagnetic pollution is an unavoidable consequence.Evading radar detection in modern warfare has also become an important prerequisite for survival on the battlefield.This review provides a comprehensive overview of the current status and types of electromagnetic absorption metamaterials,especially their design and preparation methods.Moreover,this review focuses on the strategies used to optimize the absorber absorption performance.Finally,this review presents a viewpoint on future research on electromagnetic absorption metamaterials,the main challenges that need to be addressed and the possible solutions.展开更多
基金Project supported by the Technology Research and Development Funds of Shenzhen City,China (Grant No. JC201005260129A)
文摘The T-square fractal two-dimensional phononic crystal model is presented in this article.A comprehensive study is performed for the Bragg scattering and locally resonant fractal phononic crystal.We find that the band structures of the fractal and non-fractal phononic crystals at the same filling ratio are quite different through using the finite element method.The fractal design has an important impact on the band structures of the two-dimensional phononic crystals.
基金the National Natural Science Foundation of China(Grant No.11774278)the Fundamental Research Funds for Central Universities(No.2012jdgz04)。
文摘For decades,the rapid development of wireless communication has provided people a smarter way of living.However,a significant increase in electromagnetic pollution is an unavoidable consequence.Evading radar detection in modern warfare has also become an important prerequisite for survival on the battlefield.This review provides a comprehensive overview of the current status and types of electromagnetic absorption metamaterials,especially their design and preparation methods.Moreover,this review focuses on the strategies used to optimize the absorber absorption performance.Finally,this review presents a viewpoint on future research on electromagnetic absorption metamaterials,the main challenges that need to be addressed and the possible solutions.
