CAJ | 학술논문

本文在研究了具有对称结构的理想磁性 Salisbury 屏的高频响应特性后指出，由于对金属磁性薄膜特性阻抗和电导率的要求之间存在矛盾，应用单层金属磁性薄膜不能构成具有很好地吸波性能的磁性Salisbury屏。对此，本文提出了周期结构的金属磁性Salisbury屏，证明了当铁磁性材料具有弛豫型共振磁谱时该磁性Salisbury屏和理想磁性Salisbury屏相似的反射率特性。根据实际纳米金属铁薄磁谱计算了周期性金属磁性 Salisbury 屏的反射率频谱，结果表明它具有较好的吸波性能和很好的吸收带宽。
본문재연구료구유대칭결구적이상자성 Salisbury 병적고빈향응특성후지출，유우대금속자성박막특성조항화전도솔적요구지간존재모순，응용단층금속자성박막불능구성구유흔호지흡파성능적자성Salisbury병。대차，본문제출료주기결구적금속자성Salisbury병，증명료당철자성재료구유이예형공진자보시해자성Salisbury병화이상자성Salisbury병상사적반사솔특성。근거실제납미금속철박자보계산료주기성금속자성 Salisbury 병적반사솔빈보，결과표명타구유교호적흡파성능화흔호적흡수대관。
We studied frequency response of ideal magnetic Salisbury screen and found that the screen realized by metallic ferromagnetic material might not have good performance since the conflict between the requirements for characteristic resistance and conductivity of the metallic films. To solve the problem, we proposed a periodic structured metallic magnetic Salisbury screen, and demonstrated that this kind of screen has a similar performance of ideal magnetic Salisbury screen as long as the permeability of ferromagnetic materials is of relaxation type. With reported permeability spectrum of nano-iron films, we calculated the reflectivity as a function of frequency of periodic magnetic Salisbury screen and found the screen has a broadband frequency range for absorbing microwaves well.