大学物理 ›› 2010, Vol. 29 ›› Issue (1): 13-13.

• 著者文摘 • 上一篇    下一篇

介质损耗与电磁能量

罗凌霄   

  1. 大理学院物理与电子信息学院,云南大理671003
  • 出版日期:2010-01-20 发布日期:2010-01-20

Medium loss and electromagnetic energy

  • Online:2010-01-20 Published:2010-01-20

摘要: 根据能流密度公式,推出时谐场中存在线性有损介质情形的坡印亭定理.与能量守恒定律结合,得到极化损耗、磁化损耗和焦耳损耗功率密度公式,以及有损介质中的电磁场能量密度公式.最后,推出上述各量的平均值公式.

关键词: 介质损耗, 功率密度, 电磁场能量密度

Abstract: Based on the energy-flux density formula, we deduce the Poynting theorem in the presence of simple harmonic field and loss medium. Combined with the law of conservation energy, we get the power density formula of polarization loss, magnetization loss and Joule loss and electromagnetic energy density formula in loss medium. Finally we get the average value formula of above-mentioned quantity

Key words: medium loss, power density, electromagnetic energy density

中图分类号: 

  • O442