The arbitrary shaped time harmonic line current on an antenna can be divided into many small line segments of current.
The arbitrary shaped time harmonic line current on an antenna can be divided into many small line segments of current.
将正弦时变之线电流分割很多小段之电流，若每一小段之长度甚小于波长时，则每一小段之电流即可近似为一赫芝电偶极。