In this work, we study the use of Bessel-Gauss beam launchers for wireless power transfer (WPT) applications. The power transfer efficiency between two radiating apertures is investigated in the radiative near field. A spectral Green's function approach is used to derive the power efficiency under a simultaneous conjugate impedance match. The transverse electromagnetic (TEM) mode of a coaxial cable, as well as Bessel beam (BB) and Bessel-Gauss beam (BGB) field distributions, are considered as aperture distributions. Numerical results demonstrate that a BGB field distribution is the optimal choice for WPT due to its limited spectrum and reduced diffraction of the radiated beam. We synthesized a Bessel-Gauss launcher that exhibits power efficiency exceeding 50% for distances larger than 30λ. These results show that non-diffracting beams can pave the way toward efficient near-field WPT systems with extended operating ranges.

中文翻译：

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用于无线功率传输的贝塞尔-奥斯光束发射器


在这项工作中，我们研究了贝塞尔-高斯光束发射器在无线功率传输 (WPT) 应用中的使用。在辐射近场中研究两个辐射孔径之间的功率传输效率。频谱格林函数方法用于导出同时共轭阻抗匹配下的功率效率。同轴电缆的横向电磁 (TEM) 模式以及贝塞尔光束 (BB) 和贝塞尔-高斯光束 (BGB) 场分布被视为孔径分布。数值结果表明，BGB 场分布由于其有限的光谱和减少的辐射光束衍射而成为 WPT 的最佳选择。我们合成了一种贝塞尔-高斯发射器，在距离大于 30λ 时，其功率效率超过 50%。这些结果表明，非衍射光束可以为具有扩展工作范围的高效近场 WPT 系统铺平道路。