Abstract
Research on wireless power transmission by a rectenna using millimeter waves and subterahertz waves is gaining attention. It is expected that energy harvesters at high frequencies will be developed for use with future 5 G. High-power wireless power supply to various applications will be possible because of miniaturization of the rectenna. As described herein, we investigate earlier studies of millimeter-wave wireless power supply, selecting and explaining salient examples of millimeter-wave high power wireless power supply.
Highlights
Wireless power supply is gaining attention as a new power supply source
Results show that the larger the rectenna power density becomes, the greater the amount of DC power that can be sent to a limited area
This paper introduced cutting edge millimeter wave and subterahertz wave wireless power transmission
Summary
Wireless power supply is gaining attention as a new power supply source. Especially, with the miniaturization of applications, great demand has arisen for technological development to supply sufficient power to limited areas wirelessly. They proposed a WPT system combining transmission and reception The mainstream of current millimeter-wave rectenna research includes energy-harvesting applications, which achieve high efficiency with low power operation. Such rectenna development is being undertaken for RFID, with wireless sensors for IoT, etc. Systems) [17,18] As another major factor with which the high-power wireless power supply experiment in the millimeter wave band is not actively conducted, the maximum output power of the oscillation source greatly decreases as the frequency increases [19].
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