Title :
A new configuration of coil antennas for efficient wireless power transmission systems compatible with different loads
Author :
Shi Pu ; Hon Tat Hui ; Cheng-Guo Liu ; Zhi-Peng Wu
Author_Institution :
Dept. of Phys., Wuhan Univ. of Technol., Wuhan, China
Abstract :
A new configuration of compact planar coil antennas is proposed for design of wireless power transmission (WPT) system. Within each antenna, the structures of one or more loop coil(s) placed outside and one spiral coil put inside are composed together and spaced closely. Based on this configuration, two cases of resonant mid-range WPT systems suitable with small and large load resistors can be both realized efficiently. It is shown that the maximum transfer efficiencies of the proposed WPT systems with loads of 320 mOhms and 50 Ohms arrive at around 49.1% and 56.9% respectively with resonant frequency of 19.22 MHz.
Keywords :
inductive power transmission; loop antennas; planar antennas; spiral antennas; WPT system; compact planar coil antennas; efficiency 49.1 percent; efficiency 56.9 percent; load resistors; loop coil; resonant mid-range WPT systems; spiral coil; wireless power transmission systems; Coils; Impedance; Loaded antennas; Resistors; Transmitting antennas; Wireless communication; coil; load resistance; transfer distance; transfer efficiency; wireless power transmission;
Conference_Titel :
Wireless Power Transfer Conference (WPTC), 2014 IEEE
Conference_Location :
Jeju
DOI :
10.1109/WPT.2014.6839606
