电磁波反射折射能量守恒定律推导及应用

The Derivation and Application of Energy Conservation Law in Electromagnetic Wave Reflection and Refraction

电磁波在均匀分区媒质上发生折射和反射时的能量守恒定律一直是"电磁场理论"课程教学中一个缺乏充分论述且容易引起概念混淆的知识点。本文讨论了电磁波斜入射情况下的能量守恒问题,从功率的角度推导了能量守恒关系式,并介绍了天线罩增益损失的分析方法,这有助于学生直观理解和正确应用电磁波反射折射中的能量守恒定律。

The law of energy conservation of electromagnetic wave refraction and reflection in the uniform partition medium is a easily confused knowledge point which has been a lack of adequate instructions in Electromagnetic Field Theory course. In this paper,the problem of energy conservation in the condition of electromagnetic wave oblique incident is discussed,energy conservation equation is deduced from the aspects of power,and the analysis method of the radome gain loss is introduced. All of these can help students intuitive understanding and correct application of the energy conservation law of the electromagnetic wave reflection and refraction.