铁氧体多层结构电波吸收体的研究

Research on the Multilayer Ferrite EM Wave Absorption Material

用三种不同磁导率μｉ的铁氧体基复合电波吸收材料制成双层结构电波吸收体，在７～１２ＧＨｚ频段Ａ～ｆ曲线与单层基本相似，存在两个吸收峰，但第二峰移向高频，吸收量Ａ由２０ｄＢ增至３７ｄＢ；在吸收介质层与反射板之间以及在两个介质层之间涂以介电型介质膜，使第一吸收峰移向高频，吸收量分别增至２９ｄＢ和２７ｄＢ；对其作用机理进行探讨。

Make Double-layer EM wave absorption material with composite Ferrite-Foundation Em wave absorption materials which have different magnetic permeability in the range of 7～12GHz,The curve of A～f is similar to single-layer absorption material,two absorption peaks also be found,but the second peak moves to high frequency,the absorption quantity increase from 20 dB to 37dB,Plaster dielectric-medium film between absorption-medium layer and baffle-board and between two absorption-medium layer, We can find the first absorption peak moves to high frequency,The absorption quantity of two peaks increase to 29 dB and 27dB,This thesis is a discussion of its effect mechanism.