This work fabricated absorption-dominated and low reflection microwave shielding material in X band (8.2–12.4 GHz). Short chopped carbon fibers (CFs) were aligned vertically on short chopped CF felt with the help of electrostatic flocking technique, and epoxy resin was chosen as matrix to support such structure. Vertical alignment of chopped CFs efficiently reduces surficial reflection to let microwave penetrate and be dissipated inside the shielding structure of CF. Pitch-based CFs with different length were flocked on polyacrylonitrile-based CF felt with different flocking density. It showed that after 28.5 g/m² of 8 mm CFs being flocked on CF felt, the average reflection (0.4 dB) decreases by 95% compared to CF felt, while the average shielding effectiveness (32.3 dB) and absorption (31.9 dB) increase by 25% and 85% respectively. Such improvement is attributed to multi-cooperated shielding mechanism, in which internal multi-reflection among flocking CFs and quarter-wavelength attenuation play essential roles.

这项工作制造了X波段（8.2-12.4 GHz）中吸收为主的低反射微波屏蔽材料。借助于静电植绒技术，将短切短的碳纤维（CFs）在短切短的CF毡上垂直对齐，并选择环氧树脂作为支撑这种结构的基质。切碎的CF的垂直排列有效地减少了表面反射，使微波穿透并消散在CF的屏蔽结构内。将不同长度的基于沥青的CF植绒在植绒密度不同的聚丙烯腈基CF毡上。结果表明28.5 g / m ^2之后在CF毡上植绒的8毫米CF中，与CF毡相比，平均反射（0.4 dB）降低了95％，而平均屏蔽效率（32.3 dB）和吸收（31.9 dB）分别提高了25％和85％。这种改进归因于多重合作的屏蔽机制，其中植绒CF之间的内部多重反射和四分之一波长衰减起着至关重要的作用。