活性碳毡对称振子阵列/树脂复合吸波材料的研究

Microwave Absorbing Properties of Activated Carbon-Fiber Felt Dipole Array/Epoxy Resin Composites

研究了含活性碳毡对称振子阵列吸波复合材料的微波吸收特性。结果表明:含振子阵列吸波材料的吸波性能与入射电场方向、振子两臂间的电阻、振子间的距离和阵列的位置密切相关。对称振子阵列对电磁波的吸收呈各向异性,振子与入射电场平行时,吸波性能较好;随振子两臂间电阻或振子间距的增大,材料的吸波性能先提高后降低,电阻和振子间距均存在最佳值;随振子阵列和试样下表面距离的减小,材料的吸波性能提高,振子与入射电场平行时,本实验条件下可获得有效带宽13GHz,最大吸收峰值-30.3dB的反射衰减。

Microwave absorbing properties of the composites containing activated carbon-fiber felt dipole arrays （ACFFDAs） were investigated. The results show that the absorbing performances of the composites containing ACFFDAs are affected greatly by the direction of the incident electric field, the resistance connecting the two arms, the space between dipoles and the position of the array in the sample. The microwave absorption of the composites containing ACFFDAs presents anisotropy. When the dipoles are parallel with the incident electric field, the composites show better absorbing effect. The absorbing properties rise at first and then fall with increasing the resistance connecting arms or the space between dipoles, that is, the resistance and the space have the optimum values respectively. The absorption effect is improved with decreasing the space between the dipole array and the bottom surface of the sample. In this work, when the dipoles are parallel with the incident electric field, the composite obtains a reflection loss below -10dB over 13GHz and the minimum value reaches -30.3dB.