【摘要】 利用熔融沉积型3D打印技术打印角锥结构，打印材料为PLA（热塑性塑料），制备角锥结构的复合吸波材料。制备的角锥样品为空心结构，单个角锥壁厚1 mm，高度≤20 mm，底座总面积200 mm×200 mm。研究角锥角度和角锥高度的变化对吸波性能的影响，用弓形法测试4～18 GHz波段范围的反射率。因为角锥结构吸波材料具有梯度渐变结构，同时具有介质损耗和干涉相消等多种吸波机理。结果发现角锥结构具有优异的吸波性能，角锥结构吸波性能随角锥角度（33°～73°范围之间）减小而增大，不同的角锥结构参数在C、X、Ku波段对吸波性能有不同的影响。更多还原

【Abstract】 The fused deposition 3D printing technology was used to print the pyramid structure. The printing material was PLA(thermoplastic plastic), and the composite absorbing material of pyramid structure was prepared. The prepared pyramid samples were hollow structures, with a single pyramid wall thickness of 1 mm, a height of 20 mm, and a total base area of 200 mm×200 mm. The influence of the angle and height of the pyramid on the absorption performance was studied. The reflectance of the 4～18 GHz band range was measured by the bow method. Because the angular pyramid absorbing material had gradient structure, it also had many absorbing mechanisms such as dielectric loss and interference cancellation. The results show that the angular pyramid structure has excellent absorbing performance. The absorbing performance of the angular pyramid structure increases with the decrease of the angular cone angle(33°～73°). Different angular pyramid structure parameters have different effects on the absorbing performance at C, X and Ku bands.更多还原