The analytical expressions of the electromagnetic field generated by the DC electric dipole in the upper space for the two-layer mode were obtained by using the method of mirror image. 将任意分布的电流源产生的电磁场看作是电偶极子产生的电磁场的叠加,利用镜像法推导了上半空间中的垂直直流电偶极子在两层媒质中产生电磁场的解析解。
Associating problems encountered in teaching of an introduction to electromagnetic fields, two viewpoints concerning spherical mirror method and calculation of electric field energy are pointed out. 结合“电磁场导论”课程教学中遇到的问题,指出有关球面镜像、电场能量计算的两点看法。
Electromagnetic Design of Scan Mirror Motor 扫描镜电机的电磁设计
The Q factor of an electromagnetic open resonator due to the mirror reflection loss, mirror diffraction loss and coupling aperture loss has been analyzed in detail, and more precise formulae for calculating the Q factor are obtained. Finally a calculating example is given. 本文对电磁开腔镜面反射损耗、镜面衍射损耗、耦合孔损耗在各种模式下引起的品质因数进行了深入的理论分析,得到了品质因数更为精确的计算公式,最后给出了计算实例。