Variable impedance coaxial connector interface device

A variable impedance interface device for connecting a coaxial connector to an external component, the device comprising:

• a housing having a first end adapted to receive a coaxial connector and a second end having an interface, wherein the housing is attachable to an external component at the interface;
• a cavity within the housing and defined by an inner surface, the cavity having a cavity first end and a cavity second end, the cavity first end having a first diameter, and the cavity second end having a second diameter, the inner surface tapering from the first diameter to the second diameter;
• an opening for receiving a coaxial connector at the cavity first;
• a center conductor extending into the housing from the second end and toward the first end and into the cavity, wherein the center conductor is electrically insulated from the housing by a dielectric;
• and
• a plurality of mating positions in the cavity, a first of the plurality of mating positions having a first certain dimension defined by the taper of the inner surface, and a second of the plurality of mating positions having a second certain dimension defined by the taper of the inner surface, the second certain dimension different than the first certain dimension, wherein each of the plurality of mating positions defines a location at which the coaxial connector received by the housing positions, and wherein an impedance of the housing varies from the first of the plurality of mating positions to the second of the plurality of mating positions.