抄録
Voltage and current of electricity or electro-magnetic wave are presented by complex functions. Since product of voltage and current represents power, power is presented by complex function. Real part of power presents energy, and imaginary part of power presents reactive power. Eigen oscillation is caused by reactive power. It is well known that unit element of distributed constant circuit has eigen oscillation. LC ladder circuit also has eigen oscillation. This paper shows the condition of a cascade matrix of the circuit having eigen oscillation.
