The data transmission rate required for the earth observation satellites is in the order of Gbps because of the enhanced performance of the observation sensors. However, the data transmission rate is approaching to the capable limits due to the issues of increased loss caused by the connectors or wires connected. In addition, there is another issue of the transmission irruption due to the vibration during the satellite launch. The transmission technology using the non-contact connector which has high vibration tolerance against the lossy wire connection systems is proposed and this paper describes the advantages of the non-contact connector, consisting of Transmission Line Couplers (TLC). With the transmission characteristics analysis of the connector and the design concepts, analysis of actual measurement results reveal that 15 m cables transmission of 2.5Gbps and BER less than 10-12 is feasible.