In this paper, a high-efficiency and compact wireless power transfer (WPT) receiving antenna using an flexible printed circuits board (FPCB) with high-Q factor is proposed. The proposed high-efficiency and compact WPT receiving antenna consists of a spiral structure, a lumped element and via through the ground structure. In this paper, in order to design a miniaturized high-efficiency WPT receiving antenna, machine learning technology was used to optimally design the antenna pattern that affects the Q factor. The designed receiving antenna has improved wireless power transmission efficiency with high Q characteristics. The power transfer efficiency is above 88% from distance 10 mm and the resonant frequency is 110 MHz. The sizes of the receiving antenna and the NFC antenna are 30 × 40 mm and 20 × 30 mm, respectively. Machine learning was used to design and fabricate the composite module of a WPT receiving antenna and NFC antenna. Comparison of the experimental results of the proposed receiving antenna with a general receiving antenna confirms the improvement in transmission efficiency.

本文提出了一种使用具有高Q因子的柔性印刷电路板（FPCB）的高效紧凑型无线功率传输（WPT）接收天线。所提出的高效紧凑的WPT接收天线由螺旋结构，集总元件和穿过地面的过孔组成。在本文中，为了设计一种小型高效WPT接收天线，使用了机器学习技术来优化设计会影响Q因子的天线方向图。设计的接收天线具有高Q特性，提高了无线电力传输效率。距离10 mm时，功率传输效率高于88％，谐振频率为110 MHz。接收天线和NFC天线的尺寸分别为30×40 mm和20×30 mm。机器学习用于设计和制造WPT接收天线和NFC天线的复合模块。所提出的接收天线与普通接收天线的实验结果的比较证实了传输效率的提高。