基于平均坡印亭矢量分析基本电振子的远区划分

摘要

针对天线远场的划分问题，提出了基本电振子远场条件的精确划分方法。通过计算基本电振子平均坡印亭矢量的大小与总能流密度比值，对基本电振子的远场区域的划分进行了分析，得出远区范围最小值可再准确的定义为kr ³15的结论。该方法对实际天线远场的划分具有一定的指导意义。%In view of partition of antenna far field, this paper proposes a method for precise partition of electric short dipole’s far field conditions. By calculating the ratio of the size of the electric short dipole’s average Poynting vector to the total energy flow density, it analyzes the partition of far-field area of electric short dipole and comes to a conclusion that the minimum of far area range can be defined more accurately as kr³15. This proposed method has a certain instructive significance in partition of real antenna far field.