Abstract
In this paper the transformer coupling coefficient I is discussed. The transformer for the high frequency use is considered as a distoributed circuit. Therefore the transforner equivalent circuit is composed of a ideal transformer, a leakage inductance and two starage capacitance (see Fig. 2). The transformer coupling coefficient K is linked with the leakage inductance and indicate the transformer's loss efficiency of the transmitting power. The K's value depends on the transformer coastraction. The K's values are presented from the theoritical and testing point of view.
