Phased Array Technique for Wireless Power Transmission

A phased array is composed of an array of antenna elements that are excited individually. Via tuning the phase profile and amplitude profile of the excitations, a phased array is capable of generating a narrow electromagnetic beam and steering the beam without any mechanical adjustments. Phased arrays have widespread applications in wireless communication and radar. The phased array technique may also be employed to transmit power (in contrast to information/signal) wirelessly over long distances (on the order of meters, ten meters, or longer). Nevertheless, employing phased arrays for wireless power transmission encounters various technical challenges that are typically not present in wireless communication or radar applications. As one of the primary challenges, the well-established far-zone condition is usually not satisfied when a phased array is employed as a wireless power transmitter. This presentation intends to comprehensively address the technical complications associated with the near-zone condition when the phased array technique is applied for wireless power transmission. Specifically, a closed-form formulation is derived to estimate the electromagnetic radiation as well as the power transmission efficiency when a phased array is employed to transmit wireless power under the condition of near-zone (rather than far-zone). 陆明宇分别于1995年和1997年获得清华大学电气工程学士和硕士学位，并于2002年获得伊利诺伊大学厄巴纳-香槟分校电气工程博士学位。从2002年到2005年，他是伊利诺伊大学厄巴纳-香槟分校电磁学实验室的博士后研究员。2005年至2012年，他在德克萨斯大学阿灵顿分校电气工程系担任助理教授。他于2012年加入西弗吉尼亚大学理工学院电气与计算机工程系，目前是一名教授。他的研究兴趣包括无线能量传输、物联网、雷达系统、天线设计和计算电磁学。2001年，他在马萨诸塞州波士顿举行的IEEE国际天线与传播研讨会学生论文竞赛中获得一等奖。2006年至2011年，他担任IEEE 沃思堡分会天线和传播分会主席。他目前担任IEEE西弗吉尼亚分部的财务主管。