The performance of a microwave absorbing material (MAM) is often characterized by a negative reflection loss (RL) which is due to the material’s strong absorption and weak reflection of electromagnetic radiation. An absolute absorption can theoretically be achieved in a MAM that has equal permittivity and permeability (er=ur) to satisfy the impedance matching condition Z=Z0 (Z and Z0 are the intrinsic impedance of the material and the impedance of incident medium, respectively). |
