摘要
平顶波束在无线能量传输中能够保证接收端功率密度的均匀性,对提高接收效率以及简化整流电路的设计具有重要意义。该文首先基于Orchard综合,控制Schelkunoff单位圆零点位置,得到了实现平顶波束的条件;然后通过引入Sinc函数,给出了平顶波束的解与平顶宽度的对应关系;最后利用微扰法编程计算,讨论了平顶宽度与矩形系数、波纹系数、副瓣电平之间的数值关系。以一款10元阵为例,实现了副瓣低于-22 d B且宽度很窄的平顶波束,验证了该文方法和结论的有效性。
Flat-topped beams can provide a uniform power density to the receiver in wireless power transmission, which is of great significance to improve the receiving efficiency and to simplify the design of rectifier circuit. This paper firstly studies the conditions of realizing flat-topped beam based on the Orchard synthesis by moving the zero points positions on the Schelkunoff’s unit circle; secondly, it introduces the Sinc function and gives the relationship between the solution and the width of a flat-topped beam; finally, it discusses the relationship between the width and three parameters, rectangle coefficient, ripple factor, and side lobes level by using perturbation method and numerous calculations. An example of ten-element array is given to illustrate the procedure of achieving the narrowest flat-topped beam with a side lobe level less than verifying the efficiency of the methods and conclusion in this paper.
作者
陈诚
黄卡玛
CHEN Cheng;HUANG Kama(College of Electronics and Information Engineering,Sichuan University,Chengdu 610064,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2018年第5期1115-1121,共7页
Journal of Electronics & Information Technology
关键词
天线
平顶波束
无线能量传输
Orchard综合
微扰法
Antenna
Flat-topped beams
Wireless power transmission
Orchard synthesis
Perturbation method
