面向微波电力传输的低成本易部署柔性接收天线阵

文章提出了一种用于微波电力传输(MPT)系统的柔性能量接收天线阵列，具有面积大、成本低、易部署的特点。由于能量接收器表面通常为不平整状态，因此，传统刚性材质天线无法完成共形共面制备。为了适应各种外型的运用场景，文章采用柔性材料设计天线，其介质基板和辐射导体分别基于聚酰亚胺和新型液态金属镓铟合金（其中镓的占比为75.5％，铟的占比为245％）。由于MPT应用场景非常复杂多变，故对便携性提出要求。采用折叠/充气展开技术进行结构设计，以实现接收天线阵列收放的便捷性。使用三维电磁场仿真软件（CST）对设计的柔性接收天线从单元到阵列进行仿真，天线工作频点为58GHz。最大捕获效率超过55％，并且在弯曲工况下捕获效率超过35％。仿真结果证明了文章工作的有效性和正确性。

Low-cost and easy-to-deploy flexible harvesting antenna array for microwave power transmission

In this paper, a flexible energy harvesting antenna array for microwave power transmission (MPT) system is proposed, which has the characteristics of large-area, low-cost and easy-deployment. Since the surface of the energy harvester is usually uneven, the traditional rigid antenna cannot complete the conformal operation. Therefore, in order to adapt to more all kinds of application scenarios, the flexible materials to design antenna array is used in this paper. The dielectric substrate and radiation conductor are based on polyimide and new liquid metal gallium-indium alloy, respectively (the proportion of gallium is 75.5%, and the proportion of indium is 24.5%). Since the MPT application scenario is very complex and changeable, its portability is required. In order to realize the convenience of harvesting antenna array retracting and releasing, the structure design is carried out by using the curling folding/inflatable deployment technology. CST software is used to simulate the designed flexible harvesting antenna from unit to array, and the working frequency of the antenna is 5.8GHz. The maximum harvesting efficiency is more than 55%, and the harvesting efficiency is more than 35% under bending conditions The simulation results prove the validity and correctness of the work.