Title :
Beamforming power emitter design with 2×2 antenna array and phase control for microwave/RF-based energy harvesting
Author :
Sheng-Fan Yang ; Tzuen-Hsi Huang ; Chun-Cheng Chen ; Chun-Yi Lu ; Pei-Jung Chung
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
In this paper, a 915-MHz RF-power emitter with an antenna array controlled by phase shifters is proposed to make directional energy beam point to the energy harvesting (EH) receiver. For the beamforming request, a 2×2 patch antenna array and tunable 360° reflection-type phase shifters are designed. Measurement results show the energy transmission efficiency can be improved by 3.9 times higher than that of single patch antenna at one meter away under the same input power level. Furthermore, by applying ±15° beamforming control, transmission efficiency is increased by 2.7 times when receiving antenna placed at the angle of +24°.
Keywords :
UHF antennas; UHF phase shifters; array signal processing; energy harvesting; microstrip antenna arrays; phase control; EH receiver; Microwave-RF-based energy harvesting; beamforming power emitter design; energy transmission efficiency; frequency 915 MHz; patch antenna array; phase control; reflection-type phase shifter; Antenna measurements; Array signal processing; Arrays; Microwave antenna arrays; Patch antennas; Phase shifters; Wireless power transfer (WPT); antenna array; beamforming; energy harvesting;
Conference_Titel :
Wireless Power Transfer Conference (WPTC), 2015 IEEE
Conference_Location :
Boulder, CO
DOI :
10.1109/WPT.2015.7140129
