Based on a series of simultaneous electromagnetic field equations contented with the boundary conditions, the characteristic equation of the circular groove guide loaded with dielectric is derived.

根据满足边界条件的一系列电磁场方程，推导出填充电介质的圆形槽波导的特征方程。

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Maxwell's equations conserve certain properties-the magnetic field intensity, the electric displacement field and the Poynting vector that describes the electric flux of an electromagnetic field.

麦克斯韦方程中有某些特性是恒定不变的——磁场强度、电位移场以及描述电磁场电通量的坡印廷矢量。

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By using the Maxwells equations and axial symmetry, the axial symmetric unstable electromagnetic field with unstable charge source and unstable current source is studied.

利用麦克斯韦方程组和场的轴对称性，分别对含不稳定电荷源和不稳定电流源的轴对称非静态空间电磁场进行了研究。

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