An overview of technical challenges and advances of inductive wireless power transmission

This paper focuses on the actual technical challenges that must be addressed in the field of inductive magnetic coupling at low-frequency (LF) and high-frequency (HF) bands for wireless power transmission (WPT), with special focus on smart objects applications. Inductive coupling is the most common operating principle for WPT, because of the high efficiency and the relatively high amount of energy that can be transferred. This paper will present some important applications that can benefit from this technology. Some of the actual challenges that must be addressed for a proper implementation of WPT in the mentioned applications as well as the actual trends will be discussed. Finally, research projects that have successfully dealt or are currently dealing with these problems will be presented.