A Paper-based Lightweight Absorber with Ultra-wide Absorption Band

This work presents a novel lightweight absorber with ultra-wide absorption band. The proposed absorber is designed on one kind of periodic rectangle cellular structure made of aramid paper, which is placed above one thin metal film. Each cellular cell contains one rectangle cavity filled with air, while taper shaped resistive patterns are printed on the walls of the cavity to produce energy losses. Under the normal incidence, the simulated results show that the bandwidth for the absorber with reflection less than -10 dB has a wide absorption band (reflection <; -10dB) from 4.87 GHz to 30GHz, and the thickness of the absorber is only 10mm.