Title :
Design of Retrodirective Antenna Arrays for Short-Range Wireless Power Transmission
Author :
Li, Ying ; Jandhyala, Vikram
Author_Institution :
Dept. of Electr. Eng., Univ. of Washington, Seattle, WA, USA
Abstract :
Application of retrodirective antenna arrays in wireless power transmission is proposed in this paper. The time reversal or phase conjugate theory and design considerations of the array factors are examined in GHz regime and meter range. The wireless power transmission efficiency is analyzed in the 2-D case with full-wave electromagnetic (EM) solution and validated by analytical array theory. The design factors of array size, array spacing, element size, and specific choice of the industrial, scientific and medical (ISM) band frequency are investigated to optimize the transmission focus. Design guidelines are provided for those factors and the impact of manufacturing variability is discussed. The proposed approach can also be extended to wireless power transfer with active retrodirective rectenna array and passive RFID systems.
Keywords :
active antenna arrays; antenna theory; directive antennas; inductive power transmission; rectennas; ISM band frequency; active retrodirective rectenna array; analytical array theory; array spacing; full-wave electromagnetic solution; passive RFID systems; phase conjugate theory; retrodirective antenna arrays; short-range wireless power transmission; wireless power transfer; wireless power transmission efficiency; Couplings; Dipole antennas; Moment methods; Phased arrays; Power transmission; Wireless communication; Retrodirective array; time reversal; variability design; wire antenna array; wireless power transmission;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2167897
