Multicore cable-with-connector

A multicore cable-with-connector comprising:

• a first coaxial wire;
• a second coaxial wire;
• a third coaxial wire;
• a fourth coaxial wire;
• a fifth coaxial wire;
• a sixth coaxial wire;
• a seventh coaxial wire;
• an eighth coaxial wire;
• and
• a connector connected to one end of the first coaxial wire, one end of the second coaxial wire, one end of the third coaxial wire, one end of the fourth coaxial wire, one end of the fifth coaxial wire, one end of the sixth coaxial wire, one end of the seventh coaxial wire, and one end of the eighth coaxial wire,
• wherein the first coaxial wire includes
• a first central conductor;
• a first insulating layer provided on a periphery of the first central conductor;
• a first outer conductor provided on a periphery of the first insulating layer;
• and
• a first insulating jacket provided on a periphery of the first outer conductor,
• wherein the second coaxial wire includes
• a second central conductor;
• a second insulating layer provided on a periphery of the second central conductor;
• a second outer conductor provided on a periphery of the second insulating layer;
• and
• a second insulating jacket provided on a periphery of the second outer conductor,
• wherein the third coaxial wire includes
• a third central conductor;
• a third insulating layer provided on a periphery of the third central conductor;
• a third outer conductor provided on a periphery of the third insulating layer;
• and
• a third insulating jacket provided on a periphery of the third outer conductor,
• wherein the fourth coaxial wire includes
• a fourth central conductor;
• a fourth insulating layer provided on a periphery of the fourth central conductor;
• a fourth outer conductor provided on a periphery of the fourth insulating layer;
• and
• a fourth insulating jacket provided on a periphery of the fourth outer conductor,
• wherein the fifth coaxial wire includes
• a fifth central conductor;
• a fifth insulating layer provided on a periphery of the fifth central conductor;
• a fifth outer conductor provided on a periphery of the fifth insulating layer;
• and
• a fifth insulating jacket provided on a periphery of the fifth outer conductor,
• wherein the sixth coaxial wire includes
• a sixth central conductor;
• a sixth insulating layer provided on a periphery of the sixth central conductor;
• a sixth outer conductor provided on a periphery of the sixth insulating layer;
• and
• a sixth insulating jacket provided on a periphery of the sixth outer conductor,
• wherein the seventh coaxial wire includes
• a seventh central conductor;
• a seventh insulating layer provided on a periphery of the seventh central conductor;
• a seventh outer conductor provided on a periphery of the seventh insulating layer;
• and
• a seventh insulating jacket provided on a periphery of the seventh outer conductor,
• wherein the eighth coaxial wire includes
• an eighth central conductor;
• an eighth insulating layer provided on a periphery of the eighth central conductor;
• an eighth outer conductor provided on a periphery of the eighth insulating layer;
• and
• an eighth insulating jacket provided on a periphery of the eighth outer conductor,
• wherein a first differential signal is transmitted to the first coaxial wire and the fifth coaxial wire,
• wherein a second differential signal is transmitted to the second coaxial wire and the sixth coaxial wire,
• wherein a third differential signal is transmitted to the third coaxial wire and the seventh coaxial wire,
• wherein a fourth differential signal is transmitted to the fourth coaxial wire and the eighth coaxial wire,
• wherein the connector includes a substrate having a first surface, a second surface that is an opposite side of the first surface, and a third surface that is a surface at a front end in a connector insertion direction and that connects the first surface and the second surface,
• wherein the substrate includes
• a first pad provided on the first surface and to which the first central conductor is connected;
• a second pad provided on the first surface and to which the second central conductor is connected;
• a third pad provided on the second surface and to which the third central conductor is connected;
• a fourth pad provided on the second surface and to which the fourth central conductor is connected;
• a fifth pad provided on the first surface and to which the fifth central conductor is connected;
• a sixth pad provided on the first surface and to which the sixth central conductor is connected;
• a seventh pad provided on the second surface and to which the seventh central conductor is connected;
• an eighth pad provided on the second surface and to which the eighth central conductor is connected;
• a first ground pad provided on the first surface and to which the first outer conductor and the fifth outer conductor are connected;
• a second ground pad provided on the first surface and to which the second outer conductor and the sixth outer conductor are connected;
• a third ground pad provided on the second surface and to which the third outer conductor and the seventh outer conductor are connected;
• a fourth ground pad provided on the second surface and to which the fourth outer conductor and the eighth outer conductor are connected;
• and
• a ground layer provided between the first surface and the second surface,
• wherein in a top view of the first surface, the first pad and the second pad are arranged in a first direction parallel to the third surface,
• wherein the third pad and the fourth pad are arranged in the first direction,
• wherein in a second direction perpendicular to the first surface, the first pad faces the third pad,
• wherein in the second direction perpendicular to the first surface, the second pad faces the fourth pad,
• wherein the connector includes
• a first ground guard including a capacitor that is provided between the first pad and the second pad on the first surface and that is connected to the ground layer;
• and
• a second ground guard including a capacitor that is provided between the third pad and the fourth pad on the second surface and that is connected to the ground layer,
• wherein in the first direction, the first pad is provided between the first ground guard and the fifth pad,
• wherein in the first direction, the second pad is provided between the first ground guard and the sixth pad,
• wherein in the first direction, the third pad is provided between the second ground guard and the seventh pad,
• wherein in the first direction, the fourth pad is provided between the second ground guard and the eighth pad,
• wherein when viewed in the first direction,
• a projected image of the first ground guard overlaps 50% or more of a projected image of a first layered structure composed of the first pad and a portion of the first central conductor overlapping the first pad in the top view of the first surface,
• the projected image of the first ground guard overlaps 50% or more of a projected image of a second layered structure composed of the second pad and a portion of the second central conductor overlapping the second pad in the top view,
• a projected image of the second ground guard overlaps 50% or more of a projected image of a third layered structure composed of the third pad and a portion of the third central conductor overlapping the third pad in the top view, and
• the projected image of the second ground guard overlaps 50% or more of a projected image of a fourth layered structure composed of the fourth pad and a portion of the fourth central conductor overlapping the fourth pad in the top view,
• wherein in the second direction perpendicular to the first surface, the ground layer includes
• a first ground portion between the first pad and the third pad;
• and
• a second ground portion between the second pad and the fourth pad.