Analysis, Design and Realization of a Near-Field Focused RF Power Transfer System

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Van Der Linden, R.^1 ; Visser, H.J.^1,2

Eindhoven University of Technology, Eindhoven, Netherlands^1

Holst Centre, Imec, Eindhoven, Netherlands^2

关键词: Average power;    Far field;    Full-wave electromagnetic simulation;    Linear array antennas;    Linear arrays;    Near fields;    Near-field focusing;    Yagi-Uda arrays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012118/pdf
DOI  :  10.1088/1742-6596/476/1/012118

来源: IOP

【 摘 要 】

This paper reports the analysis, design, prototyping and first measurement results of a linear array antenna consisting of Yagi-Uda elements, rotated and phased for focusing RF power in the near-field of the antenna. By employing Near Field Focusing more power may be transmitted before the EIRP limit is reached due to the inherent far-field difusing. A design based on four Yagi-Uda array elements is able to produce an average power density of 21.04dBm/m2at 2.45GHz in a box of 10×10×10cm3located 1m from the linear array face. The design has been verified through comparison with full-wave electromagnetic simulations. First measurements on a realized prototype confirm the functioning of the array.