CAJ | 학술논문

本文从时谐电磁场情况下电介质的电极化物理过程出发，通过理论推导建立了介质损耗与复介电常数的关系。在此基础上，以电容器为例得到了时谐情况下的等效电路，进一步得到电容器中电介质的复介电常数实部和虚部与频率的关系，并通过指导本科生测量电介质介质损耗角正切得到复介电常数的频率特性。
본문종시해전자장정황하전개질적전겁화물리과정출발，통과이론추도건립료개질손모여복개전상수적관계。재차기출상，이전용기위례득도료시해정황하적등효전로，진일보득도전용기중전개질적복개전상수실부화허부여빈솔적관계，병통과지도본과생측량전개질개질손모각정절득도복개전상수적빈솔특성。
This paper deduced complex permittivity from physical meaning,and presents the relationship of the polar-ization loss and the complex permittivity through theoretical analysis,then obtains the equivalent circuit of capaci-tor. Finally,experiments are carried out by undergraduates to measure the dielectric loss and tangent of dielectric medium in self-made capacitor. The experimental results are coincident with theoretical ones.