The Poynting vector that represent the flow of electromagnetic power density on a sphere from a linear dipole antenna is approximated by the summation of the field of segmented line current as Hertz dipoles.是什么意思_The Poynting vector that represent the flow of electromagnetic power density on a sphere from a linear dipole antenna is approximated by the summation of the field of segmented line current as Hertz dipoles.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句