Key points are not available for this paper at this time.
Numerous IoT sensors will be required in the pursuit of a smart society. As these sensors will be installed in various places, a wireless power supply is essential. Wireless power transfer utilizing communication radio waves has attracted interest as a potential solution, but since the power of a communication radio wave is relatively small, the generated power needs to be increased before we can expand the usage of wireless power transfer. While there has been extensive research on ways of controlling the radio transmission time and improving the efficiency of the radio frequency-direct current converter, control of the communication radio frequency has rarely been studied. In this work, we investigate how the generated power can be improved by controlling the communication radio frequency. The results demonstrate that it is possible to achieve a more efficient wireless power transfer system by selecting the appropriate frequency. Our findings will enable the expansion of use cases—for example, an acceleration sensor and a blood pressure sensor can be run using a single universal software radio peripheral.
Imae et al. (Wed,) studied this question.