High-speed signal connector and receptacle assembly equipped therewith and transceiver module assembly equipped therewith

A transceiver module assembly comprising:

• a transceiver module including an optical module board which has:
• on one electrode surface, a first group of contact pads, each contact pad of the first group of contact pads being electrically connected to a respective signal line among a first group of signal lines, the first group of signal lines including:
• a pair of transmission-side high-speed signal lines adjacent to each other and surrounded by a first grounding line,
• a pair of receiving-side high-speed signal lines adjacent to each other and surrounded by a second grounding line, and
• a group of low-speed control signal lines positioned between the pair of transmission-side high-speed signal lines and the pair of receiving-side high-speed signal lines;
• on the other electrode surface facing opposite to the one electrode surface, a second group of contact pads offset with respect to the first group of contact pads along a direction of arrangement of the first group of contact pads, each contact pad of the second group of contact pads being connected to a respective signal line among a second group of signal lines, the second group of signal lines including:
• a pair of power supply lines,
• a second pair of transmission-side high-speed signal lines,
• a third grounding line interposing between the pair of power supply lines and the second pair of transmission-side high-speed signal lines,
• a second pair of receiving-side high-speed signal lines, and
• a fourth grounding line;
• and
• a receptacle assembly including:
• a high-speed signal connector connected to the transceiver module;
• and a receptacle cage having a module accommodating portion including a module slot provided at one end and configured to allow passage of the transceiver module, the module accommodating portion for attachably and detachably accommodating the transceiver module, and a connector accommodating portion communicating with the module accommodating portion and accommodating the high-speed signal connector, wherein
• the high-speed signal connector comprises a housing including a connection end accommodating portion provided with a first group of contact terminals connected to a lower electrode surface at a connection end of the optical module board and a second group of contact terminals connected to an upper electrode surface at the connection end of the optical module board, and
• a distance from an innermost end with respect to the housing of a movable contact portion of each of the contact terminals constituting the first group of contact terminals to a mounting surface of a wiring board to which the housing is fixed is greater than a distance from an uppermost end with respect to the housing of an inclined surface portion of a fixed portion of each of the contact terminals constituting the second group of contact terminals to the mounting surface, the innermost end being located at a U-shaped curved portion of the movable contact portion, the inclined surface portion being inclined downward and inward with respect to the housing.