期刊
2019 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM (IMS)
卷 -, 期 -, 页码 1140-1143出版社
IEEE
DOI: 10.1109/mwsym.2019.8700791
关键词
Wireless power transfer; RF energy harvesting
资金
- Ulla Tuominen foundation
- Academy of Finland [310991, 315858]
- Academy of Finland (AKA) [315858, 310991, 310991, 315858] Funding Source: Academy of Finland (AKA)
In this paper, we present a prototype test-bed for radio-frequency (RF) wireless power transfer (WPT) comprising a software-defined radio (SDR) transmitter and an energy harvesting receiver with a diode-based rectifier. The test-bed allows us to study the end-to-end efficiency of RF WPT when employing different co-phased multisine waveforms. In particular, we analyze the clipping and non-linear behaviours of the transmitter by experimentally evaluating how they affect the performance of waveforms. The experimental results indicate that transmitting impulse-like signals is actually not optimal for RF WPT in practice despite they would be ideal in terms of rectifier efficiency. Instead, the results highlight the superior performance of single-tone signals over co-phased multisines in terms of both end-to-end WPT efficiency and spectral purity.
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