柔性天线中异质多材料复合结构增材制造成形机理及性能调控

The microstrip antenna put forward higher requirements on its flexibility, broadband for smart wear and soft machinery. However, the existing etching and screen printing technology have many problems including complex process and high cost exist in the face of the multilayer structure. Based on the additive manufacturing technology, the subject proposes multiple materials melt micro-droplets stacking hybrid forming using for soft microstrip antenna processing, and the experimental platform of multi nozzles melt micro-droplets stacking hybrid forming is built. Aiming to the difficulty on the deformation during the stacking process of the high elastic state flexible material, he non-contact micro drop forming method was used to analyze the influence of forming parameters on the forming precision and mechanical strength, and summarize the morphological evolution and the dynamic change law of the heat exchange in the stacking process of the heterogeneous materials melt droplet. The mechanism of mixing layers’ gradient connection strengthening is proposed to solve the problem that the interface delamination is easily appeared in the process of heterogeneous materials stacking. The mixing layer is built between flexible substrate and the conductive in order to study on the relationship between interface delamination and layer gradient distribution. the control mechanism of the multilayer composite structure forming process based on the communication performance of the flexible microstrip antenna is expounded, and the control feedback method will be built. The research results will lay a scientific foundation for heterogeneous multi material mixing material manufacturing equipment and flexible antenna processing technology.

智能穿戴、软体机械用微带天线对其柔性化、宽频化提出了更高要求，现有刻蚀、丝网印刷等技术面对其多层复合结构时存在工艺复杂、成本高的问题。本项目基于增材制造技术，提出用于柔性维带天线制备的异质多材料熔融微滴堆叠混合成形新方法，并构建多喷头熔融微滴堆叠混合成形实验平台；针对高弹态柔性材料堆叠过程中易拖曳变形的难点，采用非接触式微滴成形方式，分析成形工艺参数对整体成形精度和力学强度的影响，并总结异质材料熔融微滴在堆叠过程中的形态演变及热交换动态变化规律；针对异质材料堆叠过程易产生界面剥离的问题，提出“混合层梯度连接强化”机理，构建柔性基底与导电贴片的混合层，研究混合层梯度分布和强化结构与界面抗剥离系数的基本关系；阐明基于柔性微带天线通信性能的多层复合结构成形工艺调控机制，初步建立起控制反馈方法。该课题研究成果将为异质多材料混合增材制造装备及柔性天线加工技术方面奠定科学理论基础。

智能穿戴、软体机械用微带天线、吸波结构对其柔性化、宽频化提出了更高要求，现有刻蚀、丝网印刷等技术面对其多层复合结构时存在工艺复杂、成本高的问题。本项目基于增材制造技术，提出用于微带天线、吸波结构制备的异质多材料堆叠混合成形新方法，并构建银墨水/树脂基材堆叠混合成形实验平台；采用非接触式微滴成形方式，分析成形工艺参数对整体成形精度的影响，并探明其微滴喷射、堆叠过程中相关参数对成形效果的影响，同时在频选吸波结构、高性能天线领域开展应用，解决了现有加工技术难以成形三维嵌入式吸波结构的制备难题，并对功能结构复合增材制造技术开展了系统、详实的研究，为增材制造技术在电磁功能器件制备方面的应用研发奠定了理论基础，以此项目研究为基础，实现增材制造技术在频率选择吸波结构、高性能天线领域开展应用。