期刊
SENSORS
卷 22, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/s22114144
关键词
radio frequency energy harvesting; antenna; rectenna; rectifier; impedance matching network; voltage multiplier
资金
- Research University Grant, Universiti Kebangsaan Malaysia, Geran Universiti Penyelidikan (GUP) [GUP-2021-026]
Radio frequency energy harvesting is a potential technology that provides wireless power for battery-free devices. This review explores the sources of RF energy and its conversion into usable voltage, as well as the power and design considerations for RF-EH technology. The latest applications of RF-EH are also presented.
Radio frequency energy harvesting (RF-EH) is a potential technology via the generation of electromagnetic waves. This advanced technology offers the supply of wireless power that is applicable for battery-free devices, which makes it a prospective alternative energy source for future applications. In addition to the dynamic energy recharging of wireless devices and a wide range of environmentally friendly energy source options, the emergence of the RF-EH technology is advantageous in facilitating various applications that require quality of service. This review highlights the abundant source of RF-EH from the surroundings sources, including nearby mobile phones, Wi-Fi, wireless local area network, broadcast television signal or DTS, and FM/AM radio signals. In contrast, the energy is captured by a receiving antenna and rectified into a working direct current voltage. This review also summarizes the power of RF-EH technology, which would provide a guideline for developing RF-EH units. The energy harvesting circuits depend on cutting-edge electrical technology to achieve significant efficiency, given that they are built to perform with considerably small current and voltage. Hence, the review includes a thorough analysis and discussion of various RF designs and their pros and cons. Finally, the latest applications of RF-EH are presented.
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