Joint Impact of Input Power, PAPR, and Load Resistance on the Receiver Efficiency of Multisine Waveforms in RF Energy Harvesting

Nachiket Ayir, T. Riihonen
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引用次数: 2

Abstract

The receiver efficiency in radio-frequency (RF) energy harvesting (EH) is affected by numerous parameters such as the average RF input power and peak-to-average power ratio (PAPR) of the waveform, the EH circuit components, and the load. In this paper, we experimentally study the dependence of RF-to-DC efficiency on these parameters. We present a test-bed, comprising a signal generator and an off-the-shelf energy harvesting receiver with a diode-based rectifier, for evaluating the RF-to-DC efficiency for varying input RF power, load resistance and a number of co-phased baseband multisine waveforms (viz. PAPR). The experimental results suggest that the RF-to-DC efficiency of multisine waveforms in RF EH is significantly affected by the average input RF power and the load resistance. The high-PAPR multisine waveforms are preferable for RF EH only for a certain range of average input RF power and load resistance. In particular, for the considered rectifier, a single-sinusoid waveform yields the highest RF-to-DC efficiency for low-resistance and high average input RF power region, while high-PAPR baseband multisines are optimal for high-resistance and low average input RF power region.
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射频能量收集中输入功率、PAPR和负载电阻对多正弦波形接收机效率的共同影响
射频(RF)能量收集(EH)中的接收器效率受到许多参数的影响,如波形的平均射频输入功率和峰均功率比(PAPR)、EH电路元件和负载。在本文中,我们实验研究了RF-to-DC效率与这些参数的关系。我们提出了一个测试平台,包括一个信号发生器和一个基于二极管的整流器的现成能量收集接收器,用于评估不同输入RF功率,负载电阻和许多同相基带多正弦波形(即PAPR)的RF- dc效率。实验结果表明,射频EH中多正弦波形的RF-to- dc效率受到射频平均输入功率和负载电阻的显著影响。只有在一定的平均输入射频功率和负载电阻范围内,高papr的多正弦波形才更适合于射频EH。特别是,对于所考虑的整流器,单正弦波形在低电阻和高平均输入射频功率区域产生最高的RF- dc效率,而高papr基带多波在高电阻和低平均输入射频功率区域是最佳的。
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