Title :
A High-Efficiency Broadband Rectenna for Ambient Wireless Energy Harvesting
Author :
Chaoyun Song ; Yi Huang ; Jiafeng Zhou ; Jingwei Zhang ; Sheng Yuan ; Carter, Paul
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Liverpool, Liverpool, UK
Abstract :
This paper presents a novel broadband rectenna for ambient wireless energy harvesting over the frequency band from 1.8 to 2.5 GHz. First of all, the characteristics of the ambient radio-frequency energy are studied. The results are then used to aid the design of a new rectenna. A novel two-branch impedance matching circuit is introduced to enhance the performance and efficiency of the rectenna at a relatively low ambient input power level. A novel broadband dual-polarized cross-dipole antenna is proposed which has embedded harmonic rejection property and can reject the second and third harmonics to further improve the rectenna efficiency. The measured power sensitivity of this design is down to -35 dBm and the conversion efficiency reaches 55% when the input power to the rectifier is -10 dBm. It is demonstrated that the output power from the proposed rectenna is higher than the other published designs with a similar antenna size under the same ambient condition. The proposed broadband rectenna could be used to power many low-power electronic devices and sensors and found a range of potential applications.
Keywords :
UHF antennas; broadband antennas; dipole antennas; electromagnetic wave polarisation; energy harvesting; impedance matching; rectennas; ambient radiofrequency energy harvasting; ambient wireless energy harvesting; broadband dual-polarized cross-dipole antenna; broadband rectenna; frequency 1.8 GHz to 2.5 GHz; harmonic rejection property; power sensitivity measurement; two-branch impedance matching circuit; Broadband antennas; Broadband communication; Power harmonic filters; Radio frequency; Rectennas; Rectifiers; Wireless communication; Broadband rectifier; Rectenna; broadband rectifier; cross dipole antenna; energy harvesting; harmonic rejection; rectenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2015.2431719