A New Method to Calculate Electromagnetic Impedance Matching Degree in   One-Layer Microwave Absorbers
  A delta-function method was proposed to quantitatively evaluate the electromagnetic impedance matching degree. Measured electromagnetic parameters of {\alpha}-Fe/Fe3B/Y2O3 nanocomposites are applied to calculate the matching degree by the method. Compared with reflection loss and quarter-wave principle theory, the method accurately reveals the intrinsic mechanism of microwave transmission and reflection properties. A possible honeycomb structure with promising high-performance microwave absorption according to the method is also proposed. 
Zhi Ma, Chen-Tao Cao, Qing-Fang Liu, Jian-Bo Wang
cond-mat.mtrl-sci