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Electromagnetic Energy Balance Equations and Poynting Theorem

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posted on 2020-06-25, 15:42 authored by Gaobiao XiaoGaobiao Xiao

Poynting theorem plays a very important role in analyzing electromagnetic phenomena. The electromagnetic power flux density is usually expressed with the Poynting vector. However, since Poynting theorem basically focuses on the power balance in a system, it is not so convenient in some situations to use it for evaluating the electromagnetic energies. The energy balance issue for time varying fields is revisited in this paper, and a set of energy balance equations are introduced, and a modified method for evaluating power flux is proposed.


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Shanghai Jiao Tong University

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  • China

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