Title :
Enhancement of Wireless Power Transmission by Using Novel Multitone Approaches for Wireless Recharging
Author :
Yang, Chin-Lung ; Tsai, Chi-Lin ; Yang, Yu-Lin ; Lee, Chieh-Sen
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
7/3/1905 12:00:00 AM
Abstract :
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 0.018λ2 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.
Keywords :
antennas; battery chargers; inductive power transmission; antenna; frequency 1.83 GHz; frequency 3.36 GHz; induced voltage; multitone approach; multitone powering system; power conversion efficiency; voltage 1.92 V; wireless power transmission; wireless recharging; Antennas; Dual band; Frequency measurement; Impedance; Power transmission; Rectifiers; Wireless communication; Double frequency matching; dual-band antenna; power conversion efficiency (PCE); wireless power transmission (WPT);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2176551