Far-field Wireless Power Transfer (WPT) has emerged as a potential power source for the Internet of Things (IoT) and Wireless Sensor Network (WSN). The expansion of the power transfer range is one of the key challenges to make the technology viable. In this letter, we experimentally study a channel-adaptive joint beamforming and waveform architecture to expand the power transfer range. WPT experiments have been conducted in a variety of wireless channels at various distances in a realistic indoor environment. The measurement data have been fitted using a simple analytical model to analyze the output DC power and achievable range improvement depending on the signal design schemes and the number of tones and antennas. The model shows a clear relationship between signal design versus output DC power and achievable range, and highlight the significant benefit of the proposed architecture to expand the power transfer range.

中文翻译：

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使用联合波束成形和波形架构扩展无线功率传输范围：室内环境中的实验研究


远场无线功率传输 (WPT) 已成为物联网 (IoT) 和无线传感器网络 (WSN) 的潜在电源。扩大电力传输范围是使该技术可行的关键挑战之一。在这封信中，我们实验研究了通道自适应联合波束成形和波形架构，以扩大功率传输范围。 WPT 实验已在真实室内环境中不同距离的各种无线信道中进行。测量数据已使用简单的分析模型进行拟合，以根据信号设计方案以及音调和天线的数量来分析输出直流功率和可实现的范围改进。该模型显示了信号设计与输出直流功率和可实现范围之间的清晰关系，并强调了所提出的架构在扩展功率传输范围方面的显着优势。