电磁波屏蔽材料梯度功能设计(Ⅰ)──基本原理及材料可行性初探

FUNCTIONALLY GRADIENT DESIGN OF ELECTROMAGNETIC SHIELDING MATERIAL

为了达到低反射、高吸收的屏蔽效果，提出了“双阻抗匹配层＋双阻抗过渡区＋高吸收区”的电磁波屏蔽材料梯度功能设计模型，详细阐述了设计思路和理论依据。以Ｎｉ／铁氧体复合材料为例，对屏蔽材料梯度功能设计的材料可行性进行了初探。结果表明：现有的导电屏蔽材料（Ｎｉ）和阻抗匹配材料（铁氧体）通过成份调整，能满足屏蔽材料梯度功能设计的要求。

In order to obtain a low reflection and high absorption shielding effect, in this paper a shielding ma-tenal's design model-SFGM (shielding functionally gradient material) design, i.e.: 'double impedancematching layer + double impedance transition layers + high absorption layer' is put forward, then itstheoretical basis and designing idea are expatiated in detail. Furthermore, Ni/ferrite composites aretaken as an example to explore the material feasibility of SFGM. Results showed that, the functionallygradient design of shielding material is practical.