Novel Beam-Forming Technology for WPT System to Flying Drone
Novel Beam-Forming Technology for WPT System to Flying Drone
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WPT系统到无人机的新型波束形成技术
DOI：
10.1109/wptc48563.2020.9295559
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
N. Shinohara
中科院分区：
文献类型：
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作者：
N. Shinohara
我们正在开发用于无人机的微波功率传输（MPT）系统，并设计最佳波束形式以最大化MPT效率，包括从发射天线到接收天线的波束效率和整流天线处的RF-DC转换效率。存在一些波束形成技术来增加波束效率，但是我们不介意接收天线表面处的波束图案。整流天线的RF-DC转换效率具有输入微波功率依赖性，并且具有用于最大效率的最佳微波输入功率。如果在最大波束效率的情况下在接收天线表面处存在振幅锥形，则其适合于信号传输而不适合于MPT，因为整流天线的RF-DC转换效率不是最大的。因此，我们提出了一种平顶波束模式来提高效率，即波束效率× RF-DC转换效率。我们采用Woodward Lawson方法来制作平顶梁。
We are developing the microwave power transfer (MPT) system for the flying drone and designing an optimum beam form to maximize the MPT efficiency, consisting of a beam efficiency from a transmitting antenna to a receiving antenna and an RF-DC conversion efficiency at a rectenna, rectifying antenna. Some beam-forming technologies exist to increase the beam efficiency but we do not mind the beam pattern at the receiving antenna surface. The RF-DC conversion efficiency of the rectenna has an input microwave power dependence and has an optimum microwave input power for maximum efficiency. If there is an amplitude taper at the receiving antenna surface in the maximum beam efficiency case, it is suitable for a signal transfer but not for the MPT because the RF-DC conversion efficiency of the rectenna is not maximum. We, therefore, propose a flat-top beam pattern to increase efficiency, which is beam efficiency × RF-DC conversion efficiency. We apply the Woodward Lawson method to make the flat-top beam.