Abstract
In this study, a kind of strapped resonator is proposed to deal with high power wireless power transfer (WPT) in microwave regimes. In many specific applications, such as high power microwave wireless power transfer system (WPT), a coil resonator is not suitable due to the frequency limitations. The high cost of the high-permittivity dielectric resonators also limits their application. As a high Q resonator, the strapped resonator is often used in the anode structure of a magnetron. The field distribution of π and π + 1 modes allow the system to operate in dual-frequency mode. Numerical simulation and experimental validation show that with a certain distance, the system provides power transfer efficiency of more than 80% and 70% at 630 MHz and 970 MHz, respectively. Compared to the system based on dielectric resonators, the proposed system has higher power capacity. The leakage and radiation loss of the system is also discussed using numerical methods.
Highlights
Wireless power transfer (WPT) was first proposed by Tesla in the 19th century [1]
A wireless power transfer (WPT) system based on strapped resonators was proposed in this paper
Two resonance modes, the π and π + 1 modes, can be excited inside the strapping resonator, which allows the WPT system to operate in dual-frequency mode
Summary
Wireless power transfer (WPT) was first proposed by Tesla in the 19th century [1]. This idea did not draw the attention of researchers for nearly a century. Since the end of the 20th century, with the rapid development of electronic technology, a variety of consumer electronic products and medical electronic equipment has appeared in people’s daily lives. These electronic devices are usually highly dependent on their power supplies. In recent years, the concept of WPT has been revisited by researchers, and several
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