INVITED PAPER Special Section on Analog Circuits and Their Application Technologies Transmission Line Coupler : High-Speed Interface for Non-Contact

This paper describes transmission line couplers for noncontact connecters. Their characteristics are formulated in closed forms and design methodologies are presented. As their applications, three different types of transmission line couplers, two-fold transmission line coupler, single-ended to differential conversion transmission line coupler, and rotatable transmission line coupler are reviewed. key words: transmission line coupler, non-contact connecter, interface, transceiver