Electromagnetic loss study of honeycomb structured absorbers with a metal substrate

The broad application prospect of the honeycomb structure wave absorber in industrial and civil fields makes researchers focus on studying its wave absorbing mechanism so as to optimize its structural design and improve its wave absorbing performance. Distinguishing from the equivalent circuit thinking to study the honeycomb structured absorber, a kind of symmetry operation is adopted in this paper for the honeycomb structured absorber from the electromagnetic wave propagation point of view. The reflection loss is assumed to be the result of the loss of the incident electromagnetic wave in the absorbing body and the superposition of multiple refractions, and the symmetry operation can separate the specific physical process of the refracted wave involved in the superposition. The separated electromagnetic wave vector superposition is compared with the simulated and experimental values to verify the correctness of the conjecture. The separation results show that the absorption properties are determined by the internal loss and the phase change caused by the surface structure, which is of positive significance for the optimization and design of honeycomb absorbers.