Shielded USB connector system

A base unit for connecting an on-board electrical system to a mobile unit, comprising:

• a plug housing including a plurality of contacts for electrically contacting complementary contacts of the mobile unit;
• a coaxial connector;
• a shielded USB connector, comprising:
• two twin axial connectors including two inner contacts separated by a dielectric and further adapted to be connected to respective complementary connectors;
• two pairs of shielded connection lines, each pair being connected to a twin axial connector;
• and
• a shielded USB bridge for connecting the two pairs of connection lines to four cable terminations to form a USB line;
• and
• a printed circuit board for mounting the plug housing and the coaxial connector and for connecting said contacts to the on-board electrical system.

An adapter for connecting a mobile unit to a car-kit base unit, comprising:

• a USB cable comprising:
• two twin axial connectors including two inner contacts separated by a dielectric and further adapted to be connected to the complementary connector in the base unit;
• and
• two twin axial cables, each twin axial cable including an impedance controlled differential pair connected to a twin axial connector, the two twin axial cables being partially enveloped in an outer shield to form a double shielded USB cable;
• a receptacle housing including receptacle contacts for electrically contacting complementary contacts of the base unit;
• a coaxial connector;
• a guiding member for guiding the plug base unit during insertion;
• and
• a printed circuit board for mounting the receptacle housing, the coaxial connector and the receptacle guiding member.

A system, comprising:

• a base unit for connecting an on-board electrical system to a mobile unit, comprising:
• a plug housing including a plurality of plug contacts and a plurality of plug projections;
• a first coaxial connector;
• a shielded USB connector, comprising:
• a first pair of twin axial connectors including two inner contacts separated by a dielectric;
• two pairs of shielded connection lines, each pair being connected to one of the first pair of twin axial connectors;
• and
• a shielded USB bridge for connecting the two pairs of connection lines to four cable terminations to form a USB line;
• a printed circuit board for mounting the plug housing and the first coaxial connector, and for connecting the plug contacts to the on-board electrical system;
• an adapter comprising:
• a USB cable having:
• a second pair of twin axial connectors including two inner contacts separated by a dielectric;
• and
• two twin axial cables, each twin axial cable including an impedance controlled differential pair connected to one of the pair of second twin axial connectors, the two twin axial cables being partially enveloped in an outer shield to form a double shielded USB cable;
• a receptacle housing including receptacle contacts for electrically contacting the plug contacts of the base unit;
• a second coaxial connector;
• a guiding member for guiding the base unit during insertion;
• and
• a printed circuit board for mounting the receptacle housing, the second coaxial connector and the guiding member,
• wherein the plug housing projections in the base unit are adapted to be plugged into projections of the guiding member in the adapter and the connection lines included in the plug housing are adapted to be connected to the second pair of twin axial connectors.