The 3rd pathway of producing honeycomb-structured radar absorbing materials (HRAMs) is innovated using novel paper-based composites (PBCs) produced by a papermaking process. The PBCs consist of short-cut carbon fibers (CFs), aramid fibers (AFs), and aramid fibrils (AFBs). Thus they integrate the radar absorbing agent (CFs) into the honeycomb frames (mainly AFs and AFBs), performing as a duel-functional material for radar absorption and structural reinforcement. The PBCs containing 3 wt % of 3 mm long CFs have the maximal dielectric loss tangent and absorbance for 10 GHz microwave. The HRAMs made of PBCs consisting of 3 wt % of CFs have a low density of 28 kg/m³, and excellent microwave absorption at frequencies from 2 to 18 GHz. The HRAM with a thickness of 30 mm achieves the reflection loss < −10 dB in broad bands of 2–2.5 GHz and 4.4–18 GHz. The honeycomb model and the electromagnetic simulation method have been developed for computer-assisted design of HRAMs made of PBCs. The simulation is capable of estimating the electromagnetic behavior of HRAMs, based on the known electromagnetic parameters of corresponding PBCs. The combination of materials innovation and computer-assisted structural design will significantly accelerate the development of HRAMs.

使用通过造纸工艺生产的新型纸基复合材料（PBC），创新了生产蜂窝状雷达吸收材料（HRAM）的第三条途径。PBC由短碳纤维（CFs），芳纶纤维（AFs）和芳纶纤维（AFBs）组成。因此，它们将雷达吸收剂（CF）集成到蜂窝框架（主要是AF和AFB）中，充当用于雷达吸收和结构加固的双重功能材料。对于10 GHz微波，包含3 wt％的3 mm长CF的PBC具有最大的介电损耗角正切和吸收率。由PBC组成的HRAM由3 wt％的CF组成，密度低至28 kg /m³，在2至18 GHz的频率下具有出色的微波吸收性能。厚度为30 mm的HRAM在2–2.5 GHz和4.4–18 GHz的宽带中实现<-10 dB的反射损耗。已经开发出蜂窝模型和电磁仿真方法用于由PBC制成的HRAM的计算机辅助设计。该模拟能够基于相应PBC的已知电磁参数来估计HRAM的电磁行为。材料创新和计算机辅助结构设计的结合将大大加速HRAM的开发。