Magnetic absorbing material (MAM) embedded with electric ring resonator (ERR) is demonstrated to broaden the absorbing bandwidth in low-frequency range. We obtained the relation between input impedance and absorption bandwidth under specific reflection threshold to verify the influence of the embedded ERRs on impedance matching characteristic. Numerical simulations were carried out and the results are in agreement with theoretical analysis. We investigated the absorption mechanism through analyzing the distributions of electric and magnetic fields. The incidence angle sensitivity under different polarization modes is also discussed. It is demonstrated that the MAM with embedded-ERR increased the bandwidth under −10 dB from 1.73–3.17 to 1.48–3.87 GHz and 1.47–4.07 GHz for the TE-incidence and TM-incidence, which is 1.66 and 1.81 times wider than that of MAM, respectively. The proposed structure could broaden the absorption bandwidth in low-frequency range by means of introducing dual-band resonance in a single-layer medium.

嵌入了电环谐振器（ERR）的吸磁材料（MAM）被证明可以扩大低频范围内的吸收带宽。我们获得了在特定反射阈值下输入阻抗与吸收带宽之间的关系，以验证嵌入式ERR对阻抗匹配特性的影响。进行了数值模拟，结果与理论分析相符。我们通过分析电场和磁场的分布来研究吸收机理。还讨论了不同偏振模式下的入射角灵敏度。事实证明，对于TE入射和TM入射，具有嵌入式ERR的MAM在-10 dB以下的带宽从1.73–3.17分别增加到1.48–3.87 GHz和1.47–4.07 GHz，分别为1.66和1。分别是MAM的81倍。所提出的结构可以通过在单层介质中引入双频带共振来拓宽低频范围内的吸收带宽。