This letter presents novel multitone wireless power transmission (WPT) approaches to enhance the induced voltages for wireless recharging. Effectiveness of the proposed approaches is demonstrated by using a dual-band (1.83/3.36 GHz) antenna of only 0.018 λ 2 in size. Power conversion efficiency (PCE) represents a major challenge for WPT, especially at low input power levels. Our results indicate that PCE is related to the distributions and the combinations of input power spectrum. Therefore, a novel multitone powering system is developed to achieve a high output voltage. Experimental results indicate that the induced voltage can increase by 3.8 times over that of multitone WPT. Furthermore, wireless multitone powering can produce a 1.92-V output, i.e., an improvement of 14%, with a small average power of-5.3 dBm at 1.83 GHz.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering