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http://dx.doi.org/10.5515/KJKIEES.2019.30.3.195

Feedback Simplification Scheme for Wireless Power Transfer Systems Based on Beamforming with Phased Array Antenna  

Roh, Tae-Rae (School of Electronic Engineering, Soongsil University)
Kang, Gil-Mo (School of Electronic Engineering, Soongsil University)
Shin, Oh-Soon (School of Electronic Engineering, Soongsil University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.30, no.3, 2019 , pp. 195-201 More about this Journal
Abstract
The effectiveness of the phased array antenna in wireless power transfer systems is due to its ability to form a beam pattern towards the desired direction. To maximize the efficiency of wireless power transfer through beamforming, the transmitter must recognize the information on the optimal transmission path. To achieve this, the transmitter usually transmits pilot signals periodically and the receiver extracts the optimal beamforming weights using the pilot signals. The receiver then feeds the beamforming weights back to the transmitter. In general, the amount of feedback increases with the number of antennas, which causes feedback overhead when there is a large number of antennas. In this paper, we propose a feedback simplification scheme based on the far-field approximation method. The simulation results are provided to validate the impact of the simplified feedback on the beam pattern.
Keywords
Beamforming; Far-Field Approximation; Feedback Simplification; Linear Phased Array Antenna; Planar Phased Array Antenna;
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  • Reference
1 R. C. Hansen, Phased Array Antennas, New York, NY: John Wiley & Sons, 1998.
2 K. Huang, X. Zhou, "Cutting the last wires for mobile communications by microwave power transfer," IEEE Communications Magazine, vol. 53, no. 6, pp. 86-93, Jun. 2015.   DOI
3 S. F. Maharimi, M. F. Jamlos, M. F. A. Malek, and S. C. Neoh, "Impact of number elements on array factor in linear arrays antenna," in 2012 IEEE 8th International Colloquium on Signal Processing and its Applications, Melaka, Malaysia, Mar. 2012, pp. 296-299.
4 R. Mudumbai, J. Hespanha, U. Madhow, and G. Barriac, "Distributed transmit beamforming using feedback control," IEEE Transactions on Information Theory, vol. 56, no. 1, pp. 411-426, Jan. 2010.   DOI
5 M. Al-Husseini, H. Ghaziri, E. Yaacoub, and K. Y. Kabalan, "Rectangular and circular arrays with independently controlled beamwidth and sidelobe level," in 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, San Diego, CA, 2017, pp. 1395-1396.