Electrical connector transmitting high frequency signals

An electrical connector comprising:

• an insulative housing forming opposite upper and lower surfaces in a vertical direction and including a plurality of passageways extending therethrough in the vertical direction;
• a plurality of contacts retained in the corresponding passageways, respectively;
• each of said contacts including:
• an upstanding section retained to the housing, a downwardly deflectable spring arm extending from an upper region of the upstanding section above the upper surface with a contacting region, and a mounting leg extending from lower region of the upstanding section around the lower surface;
• and
• a plurality of solder balls attached under the mounting legs, respectively;
• wherein
• each contact further includes an extension extending downwardly from two opposite lateral outmost side edges of the spring arm toward the upstanding section;
• wherein
• the extension is essentially located between the spring arm and the upper surface of the housing in the vertical direction, and the extension is at least partially overlapped with the upstanding section in the vertical direction;
• wherein
• the upstanding section includes a first retaining section from which the spring arm extends, and a second retaining section opposite to the first retaining section with the corresponding passageway therebetween transversely, the extension downwardly extending toward and cooperating with the second retaining section to form capacitance effect therebetween.

An electrical connector comprising:

• an insulative housing forming opposite upper and lower surfaces in a vertical direction and including a plurality of passageways extending therethrough in the vertical direction;
• a plurality of contacts retained in the corresponding passageways, respectively;
• each of said contacts including:
• a retaining section,
• a spring arm extending from the retaining section in a cantilevered manner with a contacting region,
• a mounting leg extending from a lower region of the retaining section around the lower surface;
• and
• a plurality of solder balls attached under the mounting legs, respectively;
• wherein
• each contact further includes an extension extending from the retaining section and beside the spring arm;
• wherein
• the spring arm is downwardly deflectable while the extension is stationary;
• wherein
• the spring arm and the extension are at least partially overlapped with each other in the vertical direction to form capacitance effect.