Release Date：2022-06-13 Author：WANG Xin, LI Wenbo, LU Mingyu Click：
A Radio-Frequency Loop Resonator for Short-Range Wireless Power Transmission
WANG Xin1, LI Wenbo2, LU Mingyu3
(1. Chongqing University, Chongqing 400044, China; 2. Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China; 3. West Virginia University Institute of Technology, Beckley, West Virginia 25801, USA)
Abstract: A microstrip loop resonator loaded with a lumped capacitor is proposed for short-range wireless power transmission applications. The overall physical dimensions of the proposed loop resonator configuration are as small as 3 cm by 3 cm. Power transmission efficiency of greater than 80% is achieved with a power transmission distance smaller than 5 mm via the strong coupling between two loop resonators around 1 GHz, as demonstrated by simulations and measurements. Experimental results also show that the power transmission performance is insensitive to various geometrical misalignments. The numerical and experimental results of this paper reveal a bandwidth of more than 50 MHz within which the power transmission efficiency is above 80%. As a result, the proposed microstrip loop resonator has the potential to accomplish efficient wireless power transmission and high-speed (higher than 10 Mbit/s) wireless communication simultaneously.
Keywords: loop resonator; lumped capacitive loading; radio frequency; short-range wireless power transmission
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