US Patent 7591684 Electrical connector

An electrical connector comprises a longitudinal insulating housing defining a plurality of grooves and a plurality of contacts received in the groove. Each contact has a contacting arm, a retaining portion retained into the insulating housing and a soldering portion. The contacts comprises a plurality of signal contacts and grounding contacts, at least one signal contacts defining a signal group and at least one grounding contact defining a grounding group, each signal group and each grounding group are alternately arranged.