Title :
X-band wireless power transfer with two-stage high-efficiency GaN PA/ rectifier
Author :
Schafer, Scott ; Coffey, Mike ; Popovic, Zoya
Author_Institution :
Electr. Comput. & Energy Eng., Univ. of Colorado at Boulder, Boulder, CO, USA
Abstract :
A 2-stage X-band GaN MMIC operating as a power amplifier and rectifier is measured in a wireless power transfer link. The PA operates at 9.9 GHz in class-AB and achieves 10W of output power and >20 dB of gain. As a rectifier, the MMIC achieves over 52% RF-DC conversion efficiency at a power level of >8W. In a wireless powering link at a distance of 5 cm, the system achieves 10% DC-DC efficiency. The applications are bi-directional high power directional wireless power transfer (WPT).
Keywords :
III-V semiconductors; MMIC amplifiers; gallium compounds; microwave power amplifiers; microwave power transmission; rectifiers; wide band gap semiconductors; DC-DC efficiency; GaN; MMIC; PA; X-band wireless power transfer; class-AB; distance 5 cm; frequency 9.9 GHz; power 10 W; power amplifier; rectifier; wireless power transfer link; Logic gates; MMICs; Microwave transistors; Power measurement; Radio frequency; Wireless communication; MMIC; high-efficiency power amplifiers (PAs); load-pull; microwave rectifiers; wireless power conversion; x-band;
Conference_Titel :
Wireless Power Transfer Conference (WPTC), 2015 IEEE
Conference_Location :
Boulder, CO
DOI :
10.1109/WPT.2015.7140186
