Transition from a coaxial transmission line to a printed circuit transmission line

摘要

A transition piece (16) for coupling a coaxial transmission line to a printed circuit (PC) transmission line (14). The coaxial transmission line terminates in a conductive pin (18) projecting through a conductive coaxial ground plane (12). The transition piece consists of a conductive plate (34) which is adapted to be fixed between the coaxial ground plane and a PC ground plane (22) of the PC transmission line. The plate is in electrical contact with both the coaxial and PC ground planes while the conductive pin contacts a conductive strip (20) of the PC transmission line. Furthermore, the plate has an opening (32) which is shaped and aligned with the pin so that a transition-impedance of the transition piece is substantially equal to a line impedance of the coaxial and PC transmission lines.