A compact via transmission line for a printed circuit board having preferred characteristic impedance and capable of miniaturizing the printed circuit board including a multilayer printed circuit board, and extending the frequency range of a via transmission line mounted on the printed circuit board, and a design method of the same. The present invention further relates to a corresponding device. 3 in the pressure range from 1 to 500 kPa, wherein the distillation is carried out in the presence of a liquid diluent which forms with the pentene nitrile isomers, under the same pressure conditions, azeotropes whose relative volatility alpha is higher than that of the pentene nitrile isomers to be separated. The blocks provide thermal resistance, and enable a reduction in number of fasteners required for assembly. The DFE generates feedback-equalized samples by combined operation of the adaptive and fixed elements. The second wireless transmitting and receiving unit receives the intensity information.