Variable impedance coaxial connector interface device

A variable impedance interface device connecting a coaxial connector to an external component with a housing having a first end adapted to receive a coaxial connector and a second end having an interface where the housing is attachable to an external component, such as a printed circuit board. A cavity within the housing is defined by an inner surface and has a cavity first end and a cavity second end. The inner surface tapers between the cavity first end and the cavity second end. A mating position in the cavity has a certain dimension due to the taper of the inner surface, and defines a location at which a coaxial connector received by the housing positions. An impedance of the housing is based on the mating position and may be varied due to the impedance of the interface such that signal degradation at the interface is reduced.