WIRELESS POWER TRANSMISSION WITH CIRCULARLY POLARIZED RECTENNA

Design of a novel circularly polarized (CP) rectenna (rectifying antenna) at 925MHz for wireless power transmission (WPT) applications involving wireless power transfer to low power consumption wireless device is proposed. In order to build the rectenna, a CP wide-slot antenna and a finite ground coplanar waveguide (CPW) circuit both with good impedance matching, have been developed. In addition, the size of the wide-slot antenna is smaller than the conventional slot antenna up to 60% when the meander line structure is adopted. The rectenna is the voltage-doubler rectifier with the low-pass filter (LPF) for efficiency optimization and higher order harmonics re-radiation elimination. According to the measured results, the maximum RFto-DC conversion efficiency of the rectenna achieved 75% when the RF power of 15dBm is received with a load resistance of 2kΩ at free space. The experimental results prove that the proposed rectenna is suitable for the WPT applications.

[1]  Kai Chang,et al.  Compact 5.8-GHz Rectenna Using Stepped-Impedance Dipole Antenna , 2007, IEEE Antennas and Wireless Propagation Letters.

[2]  Zoya Popovic,et al.  Broadband Rectenna Arrays for Randomly Polarized Incident Waves , 2000, 2000 30th European Microwave Conference.

[3]  Itoh,et al.  A rectenna design with harmonic-rejecting circular-sector antenna , 2004, IEEE Antennas and Wireless Propagation Letters.

[4]  P. E. Glaser,et al.  An overview of the solar power satellite option , 1992 .

[5]  William C. Brown,et al.  The History of Power Transmission by Radio Waves , 1984 .

[6]  Kai Chang,et al.  5.8-GHz circularly polarized rectifying antenna for wireless microwave power transmission , 2002 .

[7]  Shouzheng Zhu,et al.  Slot-coupled circularly polarized square patch antenna for electronic toll collection system , 2008, 2008 International Conference on Microwave and Millimeter Wave Technology.

[8]  M. Kivikoski,et al.  Low-profile circularly polarized rectifying antenna for wireless power transmission at 5.8 GHz , 2004, IEEE Microwave and Wireless Components Letters.

[9]  C. Luo,et al.  Compact Circularly Polarized Rectenna With Unbalanced Circular Slots , 2008, IEEE Transactions on Antennas and Propagation.

[10]  Lixin Ran,et al.  SIGNAL DESCRIPTIONS AND FORMULATIONS FOR LONG RANGE UHF RFID READERS , 2007 .

[11]  Sebastien Rondineau,et al.  A conformal 10 GHz rectenna for wireless powering of piezoelectric sensor electronics , 2005, IMS 2005.

[12]  K. Lau,et al.  A novel wide-band circularly polarized patch antenna based on L-probe and aperture-coupling techniques , 2005, IEEE Transactions on Antennas and Propagation.

[13]  G. Yang,et al.  A new circularly polarized rectenna for wireless power transmission and data communication , 2005, IEEE Antennas and Wireless Propagation Letters.

[14]  Tzong Chee Yo,et al.  Stacked implantable rectenna for wireless powering the medical implants , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[15]  Pengfei Li,et al.  A Wireless Power Interface for Rechargeable Battery Operated Medical Implants , 2007, IEEE Transactions on Circuits and Systems II: Express Briefs.

[16]  Korany R. Mahmoud,et al.  DESIGN OPTIMIZATION OF A BOW-TIE ANTENNA FOR 2.45 GHz RFID READERS USING A HYBRID BSO- NM ALGORITHM , 2010 .

[17]  Kai Chang,et al.  A high conversion efficiency 5.8 GHz rectenna , 1997, 1997 IEEE MTT-S International Microwave Symposium Digest.

[18]  J. O. McSpadden,et al.  A dual polarized circular patch rectifying antenna at 2.45 GHz for microwave power conversion and detection , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[19]  Kai Chang,et al.  Passive 5.8-GHz radio-frequency identification tag for monitoring oil drill pipe , 2003 .

[20]  Kai Chang,et al.  Rectifying Antennas (Rectennas) , 2005 .

[21]  R. Zane,et al.  Recycling ambient microwave energy with broad-band rectenna arrays , 2004, IEEE Transactions on Microwave Theory and Techniques.