Balanced-transmission cable-and-connector unit

A balanced-transmission cable-and connector unit comprising:

• a junction substrate;
• a plug to balance transmission connected to one end of said junction substrate;
• a cable to balance transmission connected to the other end of said junction substrate;
• and
• a shielding cover covering said junction substrate, a portion of said plug connected to said junction substrate and a portion of said cable connected to said junction substrate,
• wherein:
• said cable comprises a plurality of sub-cables, each of which comprises a pair of leads to balance transmission,
• said plug comprises a pair of first and second signal contacts corresponding to the pair of leads of each of said plurality of sub-cables, respectively,
• said plurality of sub-cables being exposed from the end of said cable and connected to said other end of said junction substrate, and
• a length of a first signal transmitting path from said first signal contact to said cable via said junction substrate and an exposed sub-cable of said plurality of sub-cables is substantially equal to a length of a second signal transmitting path from said second signal contact to said cable via said junction substrate and another exposed sub-cable of said plurality of sub-cables.

A connector to balance transmission comprising:

• a cable to balance transmission;
• a plug to balance transmission;
• a junction substrate, to one end of which said plug is connected, and to the other end of which the cable to balance transmission is connected;
• and
• a shielding cover covering said junction substrate, a portion of said plug connected to said junction substrate and a portion of said cable connected to said junction substrate,
• wherein:
• said cable comprises a plurality of sub-cables, each of which comprises a pair of leads to balance transmission,
• said plug comprises a pair of first and second signal contacts corresponding to the pair of leads of each of said plurality of sub-cables, respectively, and
• a length of a first signal transmitting path from said first signal contact to said cable via said junction substrate is substantially equal to a length of a second signal transmitting path from said second signal contact to said cable via said junction substrate.

A connector to balance transmission comprising:

• a plug to balance transmission;
• a junction substrate, to one end of which said plug is connected, and to the other end of which a cable to balance transmission is connected;
• and
• a shielding cover covering said junction substrate, a portion of said plug connected to said junction substrate, and a portion of said cable connected to said junction substrate,
• wherein:
• said cable comprises a plurality of sub-cables, each of which comprises a pair of leads to balance transmission,
• said plug comprises a pair of first and second signal contacts corresponding to the pair of leads of each of said plurality of sub-cables, respectively,
• said plurality of sub-cables being exposed from the end of said cable and connected to said other end of said junction substrate, and
• a length of a first signal transmitting path from said first signal contact to said cable via said junction substrate and an exposed sub-cable of said plurality of sub-cables is substantially equal to a length of a second signal transmitting path from said second signal contact to said cable via said junction substrate and another exposed sub-cable of said plurality of sub-cables.

A plug to balance transmission, comprising:

• a housing made of synthetic resin;
• alternately arranged ground contacts and pairs of signal contacts;
• and
• two shielding plates incorporated into said housing oppositely,
• wherein:
• each pair of said pairs of signal contacts has first and second leg portions between which an end of a printed-circuit board is inserted, where lengths of said first and second leg portions of each pair of said pairs of signal contacts being equal to one another,
• each of said ground contacts has leg portions between which said end of said printed-circuit board is inserted, and
• said two shielding plates have leg portions between which said end of said printed-circuit board is inserted.

A plug to balance transmission, comprising:

• a housing made of synthetic resin;
• alternately arranged ground contacts and pairs of signal contacts;
• and
• two shielding members incorporated into said housing oppositely,
• wherein:
• each pair of said pairs of signal contacts has first and second leg portions between which an end of a printed-circuit board is inserted, where lengths of said first and second leg portions of each pair of said pairs of signal contacts being equal to one another,
• each of said ground contacts has leg portions between which said end of said printed-circuit board is inserted, and
• said two shielding members have shielding-plate portions which are inserted into said housing, and covering portions which cover said first and second leg portions of each pair of said pairs of signal contacts and said leg portions of each of said ground contacts when said shielding-plate portions are inserted into said housing.

A balanced-transmission cable-and-connector unit comprising:

• a junction substrate comprising electric conductors;
• a plug connected to said junction substrate;
• and
• a cable also connected to said junction substrate,
• wherein:
• said plug comprises pairs of signal contacts, the signal contacts of each pair thereof being located on an obverse surface and a reverse surface of said junction substrate, respectively,
• said cable comprises a plurality of sub-cables, each of said plurality of sub-cables comprising a pair of leads, and
• said junction substrate has a multi-layer structure and connects using the electric conductors the pair of leads of each one of said plurality of sub-cables of said cable with a respective pair of said pairs of signal contacts of said plug through signal transmitting paths, respectively, using an internal portion of said junction substrate, where lengths of said signal transmitting paths being substantially equal to one another.

A connector to balance transmission comprising:

• a plug;
• and
• a junction substrate comprising electric conductors, to which said plug and a cable to balance transmission are connected;
• wherein:
• said plug comprises pairs of signal contacts, the signal contacts of each pair thereof being located on an obverse surface and a reverse surface of said junction substrate, respectively,
• said cable comprises a plurality of sub-cables, each of said plurality of sub-cables comprising a pair of leads, and
• said junction substrate has a multi-layer structure and connects using the electric conductors the pair of leads of each one of said plurality of sub-cables of said cable with a respective pair of said pairs of signal contacts of said plug through signal transmitting paths, respectively, using an internal portion of said junction substrate, where lengths of said signal transmitting paths are substantially equal to one another.

A balanced-transmission connector comprising:

• a plug part to be connected to a jack;
• a balanced transmission cable;
• a junction substrate of an electrical connection between said plug part and said balanced-transmission cable;
• and
• a shielding cover covering said plug part and said junction substrate, wherein
• said balanced-transmission cable comprises a plurality of sub-cables, each of which comprises a pair of leads to balance transmission,
• said plug comprises a pair of first and second signal contacts corresponding to the pair of leads of each of said plurality of sub-cables, respectively, and
• said connector has a configuration symmetrical with respect to a virtual grand plane of signals transmitted by said connector having opposite polarities.